# How to Compare Window Proposals for a New Home Source: https://brictale.com/build/materials/compare-new-home-window-proposals Published: 2026-09-08 Audience: Homeowner Published by Brictale, a consumer home-intelligence publication. https://brictale.com ## Short answer Choose the proposal that names each opening’s exact product and ratings, proves the product fits the project jurisdiction, assigns rough-opening and water-management work, and records maintenance and warranty handoffs. Return any proposal with missing identifiers, unsupported ratings, unclear installation responsibility, or no inspection and service record. A lower price is not comparable until scope and evidence match. --- # How to Compare Window Proposals for a New Home Choose the proposal that names each opening’s exact product and configuration, ties performance values to that product, identifies the applicable climate-zone and project-jurisdiction checks, and assigns every installation and service handoff. Compare the whole documented scope—not a brand name or one low number. Return incomplete proposals for clarification before ordering, signing a change, or letting framing proceed around an unverified opening. This guide is for a new home in the United States before the window order is final. The project jurisdiction is not supplied in this brief. Record the actual city or town, county or equivalent, and state before treating any code, permit, wind, impact, egress, or inspection requirement as applicable. A national product page cannot tell you what that named authority having jurisdiction (AHJ) has adopted. This article explains what to ask, who should verify it, and what record should pass to the next person; it does not remotely approve an opening, installation, structural attachment, or code compliance. ## 1. Make the opening schedule the unit of comparison Compare window proposals one opening at a time, using the home’s coordinated opening schedule as the baseline, because a proposal total can hide different counts, sizes, operations, glass packages, accessories, installation conditions, and exclusions. The homeowner should own the comparison copy; the designer or architect should confirm the design intent; the builder or general contractor should reconcile it with framing and sequencing; and the window dealer or installer should identify the exact product and installation path. ### Start with prerequisites, not a brand shortlist Before you compare Proposal A with Proposal B, gather the documents that define the thing being priced: - The latest floor plans and elevations, with opening marks that stay stable across revisions. - A window schedule showing each opening mark, rough opening or framed condition, nominal and unit dimensions, sill height, head height, orientation, room, and operation. - The project jurisdiction: city or town, county, state, and the building department or AHJ contact used for the code check. If the home is in a special local zone, record the named program or agency rather than writing “coastal” or “high wind” as a conclusion. - The design professional’s requirements for daylight, ventilation, emergency escape and rescue, privacy, acoustics, solar control, shading, and any specialty glazing. These are design inputs, not automatic promises made by a product label. - The wall assembly and exterior finish assumptions: sheathing, water-resistive barrier, rainscreen or siding, masonry, trim, overhangs, exterior insulation, and interior air-sealing approach. - The sequencing plan: when rough openings are inspected, when units arrive, who protects them, who installs them, and what work must be complete before exterior cladding covers the water-management details. - Any written builder allowance, alternates, owner selections, and exclusions that could change the window count or scope. If the opening schedule is not stable, the proposals are not yet comparable. Ask each proposer to identify which schedule revision they used and to mark every deviation. A dealer may quote 34 units while the current plan contains 36, or one proposer may price a fixed unit where the design calls for ventilation. Those are not efficiency differences; they are different purchases. ### Copy the same row fields for both proposals Create a working table with one row per opening. Keep the opening mark from the drawings, not a vendor’s internal sequence number. If a large assembly is mulled, bayed, or joined, give the assembly one parent row and each constituent unit a child note so you can tell what is certified as an individual product, what is certified as an assembly, and what the installer must join on site. | Field to record | Proposal A | Proposal B | Who confirms it | What counts as verified | |---|---|---|---|---| | Opening mark, room, orientation | | | Homeowner + designer | Matches current plan and elevation | | Operation and handing | | | Homeowner + designer | Fixed, casement, awning, hung, slider, door, or other is named | | Exact manufacturer, series, model, size, configuration | | | Dealer | Manufacturer order code or schedule, not only a family name | | Glass and frame options | | | Homeowner + dealer | Pane count, coating, gas if stated, spacer, tint, frame, color, hardware, screens | | NFRC values and record | | | Dealer | U-factor, SHGC, VT, air leakage or “not reported,” and product record/label | | ENERGY STAR status or climate-zone fit | | | Dealer + designer | The actual product is checked for the project climate zone | | NAFS/AAMA or other performance evidence | | | Designer/engineer + dealer | Exact rating, size/configuration, and evidence attached where applicable | | Rough-opening and substrate assumptions | | | Builder + installer | Dimensions, sill, sheathing, framing, and tolerance are stated | | Flashing, sill-pan, sealant, shims, fasteners, insulation | | | Installer + builder | Each item has a responsible party and sequence | | Interior and exterior trim | | | Builder + homeowner | Finish, returns, casing, extension jambs, and touch-up are explicit | | Inspection or photo record | | | Builder/AHJ/installer | Trigger, record, and holder are named | | Maintenance and access | | | Homeowner + installer | Cleaning, weeps, hardware, screens, and safe access are assigned | | Warranty owner and exclusions | | | Dealer/builder | Written warranty, installer coverage, labor boundary, and service path | | Price, tax, freight, storage, escalation, allowance | | | Homeowner + builder | Same units and scope are normalized | | Next handoff and due date | | | Project team | One named person receives the verified record | Use “not reported,” “not applicable,” or “to be confirmed by [named party]” instead of a blank. A blank looks like an oversight and makes later review impossible. “Not applicable” needs a reason: for example, a fixed picture window has no operating hardware, but it still has a product identity, rating evidence, installation scope, drainage path, inspection record, and warranty path. ### Originality brief: make the missing decision inspectable Current answers from [ENERGY STAR’s residential window guidance](https://www.energystar.gov/products/res_windows_doors_skylights), the [U.S. Department of Energy’s purchasing guidance](https://www.energy.gov/cmei/femp/purchasing-energy-efficient-residential-windows-doors-and-skylights), [NFRC’s residential certification overview](https://nfrc.org/residential/), [FGIA homeowner resources](https://fgiaonline.org/resources/homeowner-resources/caring-for-your-windows-doors-skylights/), and manufacturer installation and warranty pages explain the individual concepts. They do not, by themselves, show a homeowner how to reconcile two new-home proposals window by window, distinguish a certified product claim from an installation promise, or preserve responsibility for rough openings, water management, records, maintenance, and service. The missing decision is: “Is this proposal complete and verifiable enough to approve, or should I return it for clarification?” The original contribution is the **Window Proposal Completeness Worksheet and Handoff Matrix**. It can be checked by taking the same opening schedule, filling one row from each proposal, opening every linked rating or instruction record, asking the named responsible person to confirm the scope, and applying the gate in Section 6. It is a review method, not a measured study, a brand ranking, or an official inspection form. **Method: copy each proposal into one row per opening, verify identity and performance against NFRC and ENERGY STAR records, compare the manufacturer installation path with the quoted scope, then apply the completeness gate before assigning a decision.** **Limitations: this worksheet does not rank brands, predict service life, establish the adopted code in a project jurisdiction, replace a design-pressure or structural review, or estimate universal local cost; missing fields remain unresolved until the responsible professional documents them.** ### What not to infer from a tidy schedule A neat window schedule is not proof of a complete proposal. It may still omit the installation condition, the transition to the wall water-control layer, who buys compatible flashing, who performs the inspection, or who stores the warranty record. A model family is not an exact model. A low U-factor is not a complete comfort or energy result. An ENERGY STAR label is not an installation certificate. A builder’s statement that “windows are included” is not a scope for sealants, shims, fasteners, sill treatment, exterior trim, interior returns, protection, cleanup, or service labor. The safe next step is to return the schedule with a numbered clarification request. Ask the proposer to answer against the same opening marks and revision. Do not resolve uncertainty by choosing the lower total or by assuming that the builder’s standard details apply to a nonstandard unit. The next handoff is to the person who can update the order or contract without changing the design silently. ## 2. Verify the product identity before comparing performance Treat product identity as a prerequisite: a performance value is comparable only when it is tied to the same manufacturer, series, model, operation, size, glazing option, frame, and configuration that the proposal will actually order. The dealer should provide the orderable identity and evidence; the homeowner should check that it matches the design; and the designer or engineer should resolve any opening-specific requirement that a catalog value cannot answer. ### Use an identity chain For every row, create an identity chain with these links: 1. Drawing opening mark, such as W-07 or D-02. 2. Proposal line item and quantity. 3. Manufacturer and product family. 4. Series, model, operation, handing, and nominal size. 5. Exact glazing, spacer, coating, gas, frame, sash, hardware, screen, color, and accessory options. 6. NFRC label or Certified Products Directory record, if the product is represented as NFRC rated. 7. Installation instruction selected for that product and new-construction condition. 8. Warranty document and service record path. If one link breaks, mark the row “identity incomplete.” Do not import the best rating from a similar product. A casement value cannot be silently applied to a slider; a standard-size rating cannot be assumed for a much larger custom unit; a window’s rating cannot be used for a joined assembly without evidence that the assembly is covered. The correct question to the dealer is: “Which exact record supports this exact line item as quoted?” The [NFRC residential certification program](https://nfrc.org/residential/) describes independent third-party verification for energy performance and identifies U-factor, solar heat gain coefficient, visible transmittance, air leakage, and condensation index as evaluated fields. That makes NFRC evidence useful for verifying what a product claims. It does not make NFRC evidence a record that an installer followed the wall detail, leveled the unit, sealed the opening, or protected a sill during construction. If a proposal relies on a separate fenestration performance certification, record the exact program and product entry rather than writing “tested.” FGIA describes the [AAMA Gold Label certification program](https://fgiaonline.org/product-certification/gold-label-certification/) as independent laboratory testing of a product sample plus ongoing inspections of manufacturing processes for continued compliance with applicable standards. That supports a request for a certification record, but it still does not prove that the unit delivered to this project or the joined field assembly has the same scope, nor does it prove installation quality. ### Separate unit, assembly, and field condition There are three different objects in a new-home proposal: - The manufactured unit: the window or door delivered from the manufacturer. - The assembly: multiple units joined, mulled, bayed, ganged, or installed with site-built trim or support. - The field condition: the actual framed opening, sill, sheathing, water-resistive barrier, flashing, sealant, fasteners, shims, insulation, interior air seal, exterior finish, and exposure. The first object is where many ratings live. The second may require additional evidence and installation instructions. The third is where responsibility becomes a construction task. Comparing only the first object creates false equivalence. Proposal A may include factory-mulled units and a full flashing package; Proposal B may include separate windows with field joining and a builder allowance for “standard install.” The totals may look close while risk has moved to the builder and homeowner. For a joined or unusually large assembly, ask who verifies support, attachment, movement, and design pressure. A homeowner can request the documentation and observe whether it is present, but should not approve a structural attachment or make a design-pressure judgment remotely. The responsible design professional, engineer, builder, or qualified installer must state the project-specific answer. ### Record options that change later care Options are not merely aesthetic. A wood interior, exterior cladding, dark finish, coastal exposure, insect screen, between-glass shade, specialty coating, or unusual hardware can change cleaning, inspection, replacement parts, access, and warranty conditions. Do not let a proposal compress them into “premium package.” Write the option in the row and carry it to the owner manual and handoff record. For each option, ask four questions: - What problem or requirement is this option intended to address? - What evidence supports that it is present on the quoted unit? - What installation or sequencing step changes because of it? - What additional maintenance or exclusion should the owner know at handover? If the answer to the first question is “comfort,” ask whether the goal is lower conductive heat flow, less solar gain, daylight, fewer drafts, lower exterior noise, or a different occupant preference. These are not interchangeable. If the answer is “code,” ask which requirement, which named jurisdiction, which opening, and which record proves compliance. Never let “code window” remain an unexplained label. ### When a product record is unavailable The correct response depends on what is missing. If the exact model is not identifiable, pause approval. If the model is identifiable but an NFRC record is not found, ask the dealer whether the product is rated, whether the value is center-of-glass or whole-product, and what evidence applies. If the product is outside the rating program or the field is not reported, write that plainly and ask the designer or code professional how the project requirement will be verified. “Not in the directory” is not automatically a failure, but it is a reason to stop treating a value as independently certified. Do not ask the homeowner to reconstruct a product from a marketing photograph or a family brochure. The next handoff is back to the dealer for a model-specific schedule, then to the designer or builder for coordination. Keep the rejected or superseded schedule in the project record with its revision date so a later substitution cannot appear to have been approved. ## 3. Compare ratings by climate, orientation, and intended use Compare U-factor, SHGC, VT, air leakage, and any condensation or performance evidence only after the exact products are identified and the project’s climate-zone and local requirements are checked by the responsible team. The [ENERGY STAR purchasing guidance](https://www.energystar.gov/products/res_windows_doors_skylights) says homeowners should determine the climate zone, find products qualified for that zone, and ask for the correct label; the [Department of Energy definitions](https://www.energy.gov/cmei/femp/purchasing-energy-efficient-residential-windows-doors-and-skylights) explain why no single “best number” is universal. ### Read each field as a different decision U-factor is a measure of heat flow through the fenestration product. Lower U-factor means less heat flow through the rated product under the test conditions. SHGC is the fraction of solar heat admitted through the product; lower SHGC generally admits less solar heat. VT indicates how much visible light passes through. Air leakage describes how much air passes through openings under a test condition, and the DOE notes that it may be reported in different units; lower leakage means less reported leakage when the units and test basis are comparable. These fields answer different questions: | Field | Ask what it tells you | Do not infer | |---|---|---| | U-factor | How the rated product compares for heat flow under the stated rating | Exact annual bill, room temperature, or whole-wall performance | | SHGC | How much solar heat the rated product admits | That a low value is always better on every orientation and in every climate | | VT | How much visible light the rated product transmits | Glare control, privacy, view quality, or daylight performance in the room | | Air leakage | How much air leakage is reported under the stated test and unit | Whole-house air tightness or a guarantee that installation has no drafts | | Condensation index, if reported | A comparative product indicator related to condensation risk | A promise that indoor condensation cannot occur under any humidity or surface condition | | Design or performance rating | Whether the exact product has evidence at a stated size/configuration | That a similar-looking product or a wall system automatically shares it | The DOE says U-factor and SHGC requirements vary by climate and that the first step is identifying the climate zone. ENERGY STAR also describes orientation tradeoffs: in colder climates, a south-facing opening may have a different solar-gain objective than an east- or west-facing opening, while warm climates generally place more emphasis on reducing unwanted solar gain. Treat that as selection context, not a replacement for the home’s energy model, shading design, or project-jurisdiction requirement. ### Use the project jurisdiction as a gate The jurisdiction field should read something like “City or town, county or equivalent, state; AHJ/building department; adopted code edition and local amendments confirmed on [date] by [name].” The city, county, state, and adopted code were not provided for this assignment, so this article makes no local code claim. That is a feature of the worksheet, not a gap to hide. The standards reference also needs a scope check. FGIA reports that the [2026 edition of AAMA/WDMA/CSA 101/I.S.2/A440, the North American Fenestration Standard](https://fgiaonline.org/about/news-and-blogs/2026-north-american-fenestration-standard-published/) has been published. Publication of a current edition does not mean that the project jurisdiction adopted it, that every opening must use it, or that a proposal’s “NAFS” shorthand proves a particular size and configuration. Ask the designer, engineer, or code professional which edition and rating path apply to this project, and attach the exact evidence to the affected opening rows. Ask the builder, designer, or code professional to verify the requirements that may affect a window proposal, including: - Energy-code U-factor and SHGC or other envelope compliance inputs. - Safety glazing locations and product markings where the adopted code requires them. - Emergency escape and rescue openings, if the design uses a window for that purpose. - Wind, impact, or other site-specific opening requirements where the named jurisdiction or design conditions trigger them. - Permit documents, inspections, special local programs, and the record the AHJ expects. The homeowner’s task is to get the written answer attached to the schedule. The homeowner should not convert a general website table into a local code determination. If the builder says “the standard meets code,” ask for the exact jurisdiction, code basis, opening group, and evidence. If the answer is verbal, record who said it and ask for a written confirmation in the contract or project log. ### Compare orientation and operation, not just averages A proposal with a lower average U-factor may still be a worse fit if it changes the SHGC needed for a room, reduces useful daylight, or replaces operable ventilation with fixed glass. Compare each orientation and room intent: - North-facing: direct solar gain may be less important, but heat flow and daylight still matter. - South-facing: shading, overhangs, glass area, and season-specific solar gain should be coordinated. - East- and west-facing: low-angle sun can create glare and heat; exterior shading and room use matter. - Bathroom, kitchen, and sleeping rooms: ventilation and privacy can matter more than a whole-house average. - Fixed versus operable: operation changes access, hardware, air leakage potential, cleaning, and emergency-use questions. FGIA explains that fixed products are generally the most airtight, while opening products involve tradeoffs that create more potential for air infiltration. Use that [FGIA air-infiltration explanation](https://fgiaonline.org/resources/homeowner-resources/residential-air-infiltration/) to prompt a room-by-room comparison, not to declare that every fixed product is suitable or every operable product is deficient. ### Worked screening example: use a formula without pretending it is an energy model The following is an illustrative comparison, not a prediction of a home’s energy use. Suppose the same 200 square feet of window area is proposed in two schedules. Proposal A has a U-factor of 0.30; Proposal B has 0.35. The difference is: `ΔU = 0.35 - 0.30 = 0.05 Btu/(h·ft²·°F)` For a screening condition of 30°F indoor-outdoor temperature difference over 1,000 hours, the conductive heat-flow difference represented by that assumed window area is: `Δ heat = ΔU × area × ΔT × hours` `Δ heat = 0.05 × 200 ft² × 30°F × 1,000 h = 300,000 Btu` That number is not an annual savings promise. It does not include the home’s hourly weather, solar gains, shading, frame and edge effects beyond the rated product basis, infiltration, wall area, HVAC efficiency, fuel, thermostat behavior, or actual operating hours. It only makes the rating difference and its sensitivity visible. If the assumed temperature difference is 15°F instead of 30°F, the result is 150,000 Btu; if the assumed hours are 500 instead of 1,000, it is 150,000 Btu. Before using the difference for a purchase decision, ask the designer or energy modeler whether the products were evaluated in the home’s actual design. The calculation is useful when it prevents a false claim such as “0.05 lower U-factor will save exactly $X.” It is not useful when it is presented as a utility forecast. Keep the inputs, units, formula, and sensitivity in the worksheet so the next professional can replace assumptions with a modeled result. ### Compare price only after performance scope is normalized Normalize each proposal into at least four buckets: 1. Product and options. 2. Delivery, storage, protection, and handling. 3. Installation and water-management work. 4. Coordination, inspection records, trim, cleanup, warranty, and service. If Proposal A includes exterior trim but Proposal B assigns it to the builder allowance, add the allowance or mark the totals “not comparable.” If Proposal A includes factory screens and Proposal B lists them as optional, preserve that difference. If one proposal has a climate-zone label while the other offers a better-looking U-factor without an applicable label or record, do not call the second one more efficient until the evidence is checked. ## 4. Compare installation, flashing, and water-management scope Approve an installation scope only when the proposal identifies the product-specific instructions, rough-opening condition, sealing and flashing sequence, attachment and shimming responsibility, water-management transition, inspection record, and the handoff to exterior cladding. The [Andersen installation guide configurator](https://www.andersenwindows.com/support/window-door-installation/installation-guide-configurator) is a useful model for the questions to ask: it generates instructions for the selected product and construction condition and includes rough-opening preparation, sealing, shimming, fastening, flashing, and water management. ### Draw the handoff across the wall The window is not the whole water-control system. A new-home opening usually crosses several parties and layers. The written scope should state who owns each transition: | Step | Observable deliverable | Typical responsible party to name | Verification before cover | |---|---|---|---| | Frame opening | Opening is built to the approved dimensions and condition | Framing contractor / builder | Builder or installer measures and records variance | | Substrate preparation | Sheathing, sill, backing, and surface are ready | Framer / builder | Installer confirms the condition matches instructions | | Sill and pan treatment | Specified sill support and drainage path are installed | Installer, or builder if explicitly assigned | Photo and installer sign-off before unit covers it | | Unit placement | Unit is positioned, plumb, level, square, and supported as instructed | Installer | Record measurements or checklist used by installer | | Fastening and shimming | Fasteners, locations, and shims match product instructions | Installer | Installer record; engineer/designer if special attachment applies | | Perimeter sealing | Compatible sealant, foam, backer, or air-seal method is installed | Installer / air-sealing trade | Photo or inspection before interior finish | | Flashing and WRB transition | Head, jamb, sill, and water-resistive barrier transition are continuous as designed | Installer + exterior-envelope trade | Review before siding, masonry, or trim conceals it | | Interior finish | Extension jambs, casing, and air-seal finish are complete | Finish carpenter / builder | Homeowner and builder walk-through | | Exterior finish | Cladding, trim, sealant, and drainage clearances are complete | Siding/masonry/trim trade | Final observation and closeout photo | The labels in the table are examples of roles, not a national allocation of legal responsibility. The proposal and contract must name the actual party. Andersen’s own page says that attachment method, fastener selection, and code compliance are the responsibility of the architect, building owner, contractor, installer, and/or consumer as applicable. That is why a homeowner should not accept “installed per code” as a complete installation scope without identifying who performs and records the work. ### Match installation instructions to construction type New construction is not the same condition as replacement. The wall is open, the rough opening may be new, the water-resistive barrier may not yet be integrated, and framing tolerances can still change. A replacement instruction may assume an existing frame, existing cladding, or a different sill condition. [Pella’s window installation page](https://www.pella.com/professionals/installation-instructions/windows/) separates new construction, full-frame replacement, pocket replacement, and accessories or assemblies. Use the exact product and the exact construction condition when asking for instructions. Put the instruction identifier or link in the proposal row. Do not write only “manufacturer install.” The record should answer: - Which product family, model, and size does the instruction cover? - Is the unit flanged, finless, brickmoulded, pocketed, recessed, mulled, or joined? - What is the assumed wall assembly and water-resistive barrier sequence? - Which materials are supplied by the manufacturer and which are supplied by the installer or builder? - What sealants, tapes, foams, membranes, flashing, fasteners, shims, and insulation are compatible? - Where does the sill drain, and what prevents the exterior finish from blocking that path? - What happens if the rough opening is out of tolerance or wet when the installer arrives? - What inspection or photo must occur before the next trade covers the work? The proposal should state a stop-and-escalate path for a nonconforming opening. The safest response to a wet, damaged, distorted, or undersized opening is not to improvise in the field. The installer should notify the builder, and the responsible designer, manufacturer technical representative, or engineer should determine the correction when the condition affects support, movement, water management, or code. ### Keep product proof separate from installation proof A product can have a certification record and still be installed incorrectly. A well-written installation scope can also be attached to a product that was substituted without updating the record. Keep two evidence columns: - Product evidence: label, NFRC record, performance report, model schedule, option confirmation, warranty. - Installation evidence: instruction version, opening condition, materials, photos, checklist, installer identity, inspection, and approved deviations. The product column is mostly verified before ordering. The installation column is verified during the build and at cover-up. Do not check both boxes at the same time because a dealer sent one PDF. The next handoff after product approval is the builder’s coordination meeting; the next handoff after installation is the inspection or cover-up record to the owner’s project file. ### Ask about weather and storage Window proposals often focus on the unit and understate what happens between delivery and installation. Ask who receives, unloads, stores, protects, and inspects the windows. Record the storage location and the condition check. Do not permit a proposal to shift damage risk to the homeowner without explaining how damaged packaging, wet materials, impact, or prolonged exposure is documented and reported. Pella’s warranty page warns that improper storage can cause damage and recommends installing products as soon as possible to avoid storage damage. That is a manufacturer-specific statement, so use it as a prompt to read the exact written warranty for the selected product, not as a universal storage rule. The handoff should state who can reject a damaged unit, who photographs it, who contacts the dealer, and whether the schedule changes. ### Safety boundary for installation review Window installation can involve heavy units, sharp glass, ladders, scaffolding, elevated work, sealants, power tools, and temporary openings. A homeowner can review documents, ask questions, photograph approved visible work, and compare a delivered label with the schedule. A homeowner should not climb an unsafe scaffold, handle a large glass unit, alter structural framing, select fasteners for a special condition, or sign that an opening is code-compliant based only on a remote photo. Assign those tasks to the qualified installer, builder, architect, engineer, or inspector responsible for the actual project. If a temporary opening is exposed to weather or a unit is cracked, stop work in that area and notify the builder. Keep people away from unstable glass or unprotected openings. The next safe action is a professional site assessment and a written correction record. ## 5. Compare maintenance, service, and warranty handoffs Choose the proposal with a clear ownership path after installation: the homeowner should know what to clean, inspect, lubricate, protect, and report; which parts are covered by which document; who keeps serial numbers and order records; and who responds first when the issue is a product defect, installation defect, adjacent wall problem, or ordinary maintenance need. A long warranty headline is not comparable until exclusions, labor, installer obligations, transfer rules, and records are visible. ### Build a maintenance schedule before purchase Maintenance is a design input because access, screens, hardware, drainage, coatings, and replacement parts affect ownership. [FGIA’s care guidance](https://fgiaonline.org/resources/homeowner-resources/caring-for-your-windows-doors-skylights/) says product lifespan and performance depend on quality, design and construction practices, installation, climate and exposure, care, maintenance, and replacement of worn parts. That is why this comparison should record the future task, not just the opening-day appearance. | Timing or trigger | Homeowner observation or task | What to record | Escalate to | |---|---|---|---| | At handover | Confirm every unit opens, closes, locks, latches, drains, and has the specified screen or accessory | Opening mark, condition, photo, serial or order record | Builder/installer for defects | | After first heavy rain | Look for visible interior water, staining, blocked drainage, or unexpected movement; do not disassemble | Weather event, location, photos, room conditions | Builder/installer; envelope professional if recurring | | Seasonal or manufacturer interval | Clean glass, frames, tracks, and screens using the owner manual | Date, product, cleaner or method | Manufacturer if the manual conflicts | | Regular inspection | Check weatherstripping, caulking, hardware, cracked surfaces, fogging between panes, and damaged parts | Defect description and opening mark | Dealer/manufacturer or installer | | Before selling or transferring | Assemble labels, serial numbers, order, warranty, manuals, repairs, and maintenance records | Handover packet index | Warranty/service contact | | After severe exposure | Inspect finish, drainage, hardware, and visible damage without unsafe access | Exposure and findings | Qualified local professional | FGIA specifically advises keeping tracks and weep holes clear, checking weatherstripping, hardware, and caulking, and avoiding pressure washers and abrasive or caustic cleaners. Use the [FGIA maintenance and drainage guidance](https://fgiaonline.org/resources/homeowner-resources/caring-for-your-windows-doors-skylights/) as general care context, then attach the selected manufacturer’s owner manual. A maintenance record is not proof that the original installation was correct; it is the owner’s later evidence of care and the starting point for service. ### Separate product warranty from installation warranty Ask for two documents and two contacts: 1. The manufacturer’s written product warranty for the exact product and options. 2. The builder or installer’s workmanship and installation warranty, including the duration, notice method, exclusions, and whether the installer will diagnose adjacent wall or cladding issues. Do not assume that the manufacturer will repair an installation defect or that the builder will replace a failed insulated-glass unit. The contract should say where the homeowner starts and how the parties coordinate when responsibility is disputed. If a warranty excludes consequential damage, labor after a stated period, field-applied finishes, improper maintenance, unauthorized modifications, or installation not following instructions, record those exclusions before purchase. Pella’s current warranty FAQ says installation instructions must be followed for product warranty coverage, that service labor and component coverage can vary, and that a serial number, purchase order, or order number may be needed for parts or warranty service. Use the [Pella warranty page](https://www.pella.com/support/warranties/) to prompt a record handoff, but read the exact written warranty for the selected product. The FAQ is not a substitute for the contract or warranty document. ### Make the warranty record durable At handover, create one folder per home and an index with: - Opening mark and room. - Manufacturer, series, model, size, configuration, and options. - Serial number or order number, if provided. - NFRC label or product record, ENERGY STAR status if represented, and any performance report. - Installation instruction identifier and version. - Installer, builder, dealer, and manufacturer service contacts. - Date delivered, date installed, and date accepted or corrected. - Photos before the water-management details were covered, where the project record includes them. - Warranty document, start date basis, exclusions, labor boundary, and transfer language. - Maintenance manual and the next owner’s care instructions. Avoid storing only a website link. Pages and manuals change; retain the document supplied for the order and record the access date. Do not alter a warranty document or annotate it as if it were an official approval. If the dealer refuses to provide a model-specific record, mark the handoff incomplete and ask the builder whether the contract permits ordering without it. ### Compare the cost of reaching and replacing the unit Access belongs in the proposal comparison because a maintenance task that cannot be performed safely becomes a deferred defect. Ask how the homeowner will reach high exterior glass, remove a screen, clean a track, operate a vent, inspect a weep, or replace a sash or insulated-glass component. Note whether the design requires a ladder, roof access, lift, scaffold, removable interior trim, or a service visit. The proposal need not promise that every future task is easy, but it should not hide an access condition that changes ownership. For a hard-to-reach opening, ask the designer and builder whether the opening can be resized, relocated, shaded, made fixed, or provided with a safe access route without compromising the room’s purpose or any project requirement. Ask the dealer whether parts are orderable by model and serial information and whether replacement work is performed by the manufacturer, dealer, installer, or an independent service company. A proposal that costs less at order but leaves an unassigned future access problem is not a whole-life comparison; it is an incomplete handoff. This is not a request for a universal service-life forecast. FGIA identifies climate, exposure, installation, care, and replacement of worn parts as factors, so a maintenance record can be more decision-useful than an unsupported promise that one frame material will last a fixed number of years. Record the exposure and the owner’s realistic ability to maintain it. In a salt-air environment, for example, ask the manufacturer whether hardware and cleaning intervals differ; do not invent a frequency. In a dusty or wildfire-prone area, ask how the selected screens, tracks, coatings, and drainage paths should be cleaned; do not assume a pressure washer is safe. When a proposal includes a special finish or accessory, ask the supplier to state the cleaning method, prohibited chemicals, replacement part path, and whether field painting or alteration affects coverage. Carry the response into the handover packet. The next decision is not just whether the option fits the design; it is whether the owner accepts the care obligation and has a safe way to perform it. ### Test service before you need it Before closing the purchase, send one short question to each service path: “If this unit arrives damaged, operates incorrectly, leaks at the perimeter, or develops fogging between panes, who receives the notice, what opening and serial information is required, and who decides whether the issue is product, installation, or adjacent construction?” Keep the written response. This is not a warranty claim; it is a check that the proposal has a usable handoff. If a service path says “contact your dealer,” record the dealer’s legal or trading name, address, email, phone, and the person responsible for the project. If the builder owns the purchase, ask whether the homeowner receives a direct warranty record or only a builder closeout. That distinction matters at sale, after a builder warranty expires, or when the builder is no longer available. ## 6. Apply a completeness gate and decision matrix Approve a proposal only when every material field is either verified, explicitly not applicable with a reason, or assigned to a named person with a due date before the irreversible next step; use the matrix to choose between complete proposals, not to manufacture a product score. The matrix is deliberately asymmetric: an unresolved structural, code, water-management, identity, or warranty handoff can stop approval even if the price is attractive. ### The completeness gate Use the following 16-field gate for each opening or assembly. Mark each field `V` for verified, `N/A` with a written reason, or `O` for open. An open field is not a failure forever; it is a reason to assign an owner and deadline. But the proposal cannot be “approved” until the fields designated as stop conditions are closed. | Gate field | Verified evidence | Stop condition if open? | |---|---|---| | 1. Opening mark and revision | Current drawing/schedule match | Yes | | 2. Product identity | Exact model, size, operation, options | Yes | | 3. Rated performance | NFRC or other applicable evidence tied to unit | Yes when used to support selection or code input | | 4. Climate-zone fit | ENERGY STAR or other selected basis checked | Yes when represented as qualifying | | 5. Project-jurisdiction check | Named city/county/state and responsible verifier | Yes | | 6. Special opening requirement | Egress, safety glazing, wind/impact, acoustic, or other need addressed | Yes when applicable | | 7. Rough-opening condition | Dimensions, substrate, tolerance, and preparation | Yes | | 8. Installation instruction | Product- and construction-specific instruction | Yes | | 9. Sill and water management | Scope, materials, drainage, transition, and sequence | Yes | | 10. Attachment and shimming | Installer responsibility and evidence path | Yes | | 11. Cover-up inspection | Trigger, record, and record holder | Yes for concealed work | | 12. Interior/exterior finishes | Included scope and finish responsibility | No, but cost must be normalized | | 13. Storage and damage | Receiver, protection, rejection, and replacement path | No, but risk must be assigned | | 14. Maintenance | Owner tasks, access, manuals, parts | No, but handover is incomplete | | 15. Warranty | Exact warranty, installer coverage, exclusions, service contact | Yes before final approval | | 16. Price and exclusions | Same quantities, options, labor, freight, tax, allowances | Yes for a price decision | For a row-level completeness percentage, calculate: `verified completeness = (V + justified N/A) ÷ 16 × 100` The percentage is an administrative check, not a quality score. A row with 15 of 16 fields can still be unapprovable if the missing field is product identity, code basis, water management, or warranty. Conversely, a row with a justified N/A for a nonoperable screen feature can remain complete if that reason is recorded. The gate prevents false confidence from averaging away a critical gap. ### The proposal-level decision matrix After rows pass the gate, compare the proposals across decisions that matter to the homeowner. Use `meets`, `needs clarification`, or `does not meet`; do not use a hidden 1-to-10 rating. | Decision | Proposal A | Proposal B | Evidence to compare | Next action | |---|---|---|---|---| | Every opening is represented | | | Reconciled schedule and quantities | Return mismatches | | Exact product is orderable | | | Model/configuration/order code | Obtain corrected schedule | | Ratings are applicable | | | NFRC record, climate-zone basis, named jurisdiction check | Ask designer/dealer to verify | | Orientation and operation fit the room | | | SHGC/VT, operation, ventilation, shading, access | Revise design or selection | | Installation scope is complete | | | Product instructions and responsibility matrix | Assign every omission | | Water-management transition is visible | | | Sill, flashing, WRB, cover-up record | Pause before ordering/cover-up | | Maintenance is practical | | | Access, weeps, screens, hardware, manual | Choose or redesign access | | Warranty path is usable | | | Written warranty, service contact, records | Make handoff contractual | | Price is scope-normalized | | | Product + install + finish + risk buckets | Reprice on same basis | | Next decision is clear | | | Owner and due date for each open item | Approve, clarify, or reject | ### How to handle a cheaper incomplete proposal Do not “credit” missing scope with an arbitrary allowance unless the allowance is based on a documented quantity and responsibility. For example, if Proposal B excludes sill-pan materials, ask the builder or installer to price the exact material and labor scope required by the selected product instructions and wall detail. If nobody can price it yet, keep the proposal open. An incomplete price is not a low price; it is an unknown. Likewise, do not add a large percentage contingency merely to make an incomplete bid feel safe. That hides the decision. List the missing item, who must answer, the date, and the consequence if the answer changes the order. If the answer cannot arrive before a procurement deadline, the homeowner should ask whether the deadline can move or whether a different fully documented proposal is the safer selection. ### A worked illustrative comparison Assume a homeowner receives two proposals for the same 28 opening marks. Both totals include units and delivery. Proposal A identifies every opening, exact model, NFRC record, climate-zone status, and a product-specific new-construction installation guide. Its installation scope includes rough-opening preparation, sill treatment, flashing, shimming, fastening, sealant, protection, a pre-cover inspection, and owner records. Proposal B has a lower total but combines several operations into “standard install,” does not identify the joined living-room assembly, lists no record holder for photos, and says “warranty per manufacturer” without naming the document or service contact. The worksheet result is not “A scores 9 and B scores 7.” It is: - A: price comparable after confirming finish and storage exclusions; all stop-condition fields verified or assigned before order. - B: return for clarification; the missing assembly identity, water-management scope, inspection record, and warranty handoff are stop conditions. If B supplies the missing records and the scope then matches, compare the revised totals. If B cannot supply them, the homeowner has a defensible reason to reject or defer the proposal without claiming that A is universally the better window. This is the point of the matrix: it makes the decision depend on evidence and responsibilities, not on an invented brand score. ## 7. Approve, return, and hand off the decision in sequence The safest sequence is to lock the opening schedule, collect comparable proposals, verify product and performance evidence, resolve jurisdiction-specific requirements, assign installation and water-management scope, normalize price, approve in writing, verify delivery and installation, and preserve the closeout record. A homeowner should always know the next decision and who receives the record after each step. ### Sequence of actions and responsible people **1. Freeze the comparison revision.** The homeowner and designer identify the drawing and schedule revision. The builder confirms that no pending layout change is expected to alter counts, sizes, operation, or rough openings. **2. Issue the same scope to each proposer.** The dealer or installer receives the same opening schedule, wall assumptions, requested options, project location, and response template. The homeowner keeps the request and the response date. **3. Reconcile quantity and operation.** The homeowner checks line items against opening marks. The designer resolves conflicts about ventilation, daylight, privacy, view, egress intent, shading, and appearance. **4. Verify product identity.** The dealer supplies model, size, configuration, glazing, frame, options, and evidence record. A family name is not enough. **5. Check performance and jurisdiction.** The dealer or designer supplies NFRC/ENERGY STAR evidence where represented. The project’s named AHJ or qualified code professional confirms the adopted local requirements. Keep the jurisdiction and date in the schedule. **6. Compare installation paths.** The builder and installer assign rough-opening preparation, sill and flashing, sealing, shimming, fastening, water-management transition, finishes, protection, and inspection. The product-specific instruction is attached. **7. Normalize price and exclusions.** The homeowner, builder, and dealer clarify freight, tax, storage, damage, screens, trim, labor, allowances, escalation, changes, and service. **8. Apply the completeness gate.** Open critical fields remain open. The homeowner does not approve by silence, deposit, or a verbal “looks good.” **9. Approve the exact revision.** The person authorized by the contract signs or otherwise records the approved schedule, proposal, instructions, and exceptions. Superseded schedules remain marked superseded. **10. Verify delivery.** The receiver checks labels, counts, visible damage, options, and storage. Damaged or mismatched units are photographed and quarantined from installation until the responsible party responds. **11. Verify installation before cover.** The installer and builder complete the agreed record before cladding, interior finish, or insulation hides the work. A homeowner may observe from a safe location but does not replace the responsible inspection. **12. Complete handover.** The builder or dealer transfers manuals, records, serials, warranty documents, approved changes, maintenance tasks, and service contacts to the homeowner. The homeowner checks that each opening can be found from the record. ### Failure case: the proposal says “all windows per plan” This phrase may refer to count and location but not product, size, operation, glass, or installation. Return a marked-up schedule. Ask for a line-by-line response with a model or an explicitly named allowance. If the proposer says the model will be chosen later, identify who decides, when, under what performance and budget limits, and how the homeowner approves a substitution. A future selection without a decision gate is a change-order risk. ### Failure case: a rating is better but the opening is wrong A lower U-factor does not cure a unit that is too large, too small, fixed where ventilation is intended, or incompatible with the rough opening or wall detail. Ask the designer and builder to resolve the opening first, then compare ratings among products that can actually be installed. Product performance cannot be separated from the opening’s use and construction condition. ### Failure case: the builder says the installer owns everything Ask the builder to show the contract boundary and the installer’s written scope. The installer may own unit placement and fastening while the builder owns framing, sheathing, WRB, cladding, or inspection coordination. No label such as “turnkey” should replace the handoff table. If the parties disagree, pause the order and ask the contract administrator, designer, or qualified envelope professional to resolve the allocation in writing. ### Failure case: water appears after a storm Do not assume the window is defective. Record the opening, weather direction and duration, interior condition, visible water path, photos, and whether the exterior finish or interior trim is complete. Do not remove trim, drill holes, add caulk, pressure-wash, or alter flashing before the responsible builder or envelope professional assesses it. A recurring issue may involve the unit, installation, adjacent cladding, roof or wall transition, or drainage. The next decision is a documented diagnosis, not a replacement order. ### Failure case: fogging, stiff operation, or a blocked weep Fogging between panes, difficult operation, damaged weatherstripping, and blocked drainage are different observations. FGIA recommends regular inspection and identifies moisture or fogging between panes, damaged weatherstripping or caulking, and damaged parts as reasons to investigate or repair. Clear an accessible weep only as allowed by the owner manual; do not use a sharp tool or pressure washer that could damage components. Record the opening mark and contact the service path with the serial or order information. ### Failure case: a substitution arrives at the site Compare the delivered label and visible configuration with the approved schedule before installation. If the model, operation, glass, frame, finish, or size differs, stop that unit’s installation and notify the builder and dealer. The substitute needs a new identity chain, performance check, installation instruction, price/exclusion review, and written approval. A field decision to “use it because it is close” destroys the very record needed for warranty and maintenance. ### Use the handoff record to make the next decision easy At the bottom of each opening row, write one sentence in this form: `Decision: approve / return for clarification / hold for professional verification. Owner: [role or named person]. Evidence due: [document or record]. Due before: [order, delivery, installation, cover-up, or handover].` The role must be real in the project: homeowner, architect, designer, builder, dealer, installer, engineer, energy modeler, or AHJ contact. Do not assign “team” as an owner. The date should correspond to the irreversible next step. A code question is due before permit or order as applicable; a rough-opening question is due before framing or installation; a cover-up photo is due before siding or interior finish; a warranty record is due at handover. ## The compact approval checklist Before approving a new-home window proposal, confirm that: - The actual project jurisdiction is written as city or town, county or equivalent, and state, with the responsible code verifier and adopted local basis recorded. - The opening schedule revision and quantities match the current drawings. - Every opening has an exact model, operation, size, glazing, frame, option, and configuration. - Every claimed rating is tied to the exact product and the evidence record is saved. - U-factor, SHGC, VT, air leakage, and condensation information are interpreted as separate fields rather than one “efficiency” score. - Orientation, shading, ventilation, privacy, access, and room use have been considered with the designer. - The new-construction installation instruction is attached for the selected product and condition. - Rough-opening preparation, sill and water management, flashing, sealing, shimming, fastening, insulation, trim, and protection have named owners. - The cover-up inspection or photo record has a trigger and a holder. - Delivery, storage, damage, rejection, and replacement responsibilities are explicit. - Product warranty and installation/workmanship warranty are separate, readable, and connected to service contacts. - Serial numbers, order numbers, manuals, labels, installation records, and approved changes will reach the homeowner. - Maintenance access and recurring tasks are practical for the actual home. - The matrix says approve, return, or hold for each open item, with a named owner and due date. If one of the identity, jurisdiction, installation, water-management, or warranty stop conditions remains unresolved, return the proposal. The right next decision is not “which window looks better?” It is “what evidence or responsible-person confirmation is still needed before this opening can be ordered and installed without losing the handoff?” For the broader journey from design choices into coordinated construction records, keep this page with the homeowner’s [Brictale Blog](/blog) project file and carry the approved schedule into the builder’s construction and handover documents. ## Evidence - ENERGY STAR says homeowners should determine the applicable climate zone, identify qualifying products, request the correct label when ordering, compare installer quotes by labor and materials, and retain ENERGY STAR and NFRC labels as documentation. [Residential Windows, Doors, & Skylights | ENERGY STAR](https://www.energystar.gov/products/res_windows_doors_skylights). Scope: U.S. residential windows, doors, and skylights; buying guidance and ENERGY STAR qualification context, not a project-specific adopted code or installation approval.. Accessed: 2026-09-07. - The U.S. Department of Energy explains that window U-factor measures heat flow and lower U-factor means less heat flow; SHGC measures solar heat transmitted and lower values transmit less; VT describes visible light transmission; air leakage is reported in different units and lower leakage is better. [Purchasing Energy-Efficient Residential Windows, Doors, and Skylights | U.S. Department of Energy](https://www.energy.gov/cmei/femp/purchasing-energy-efficient-residential-windows-doors-and-skylights). Scope: U.S. federal purchasing guidance and definitions for residential fenestration performance fields; examples and thresholds are not a substitute for the named project jurisdiction’s adopted code.. Accessed: 2026-09-07. - NFRC’s residential certification program provides independent third-party verification and evaluates U-factor, solar heat gain coefficient, visible transmittance, air leakage, and condensation index for residential fenestration products. [Residential Product Certification | National Fenestration Rating Council](https://nfrc.org/residential/). Scope: NFRC residential certification program and certified product performance fields; certification describes the rated product and does not prove a contractor installed it correctly.. Accessed: 2026-09-07. - FGIA explains that fixed products are generally the most airtight while products that open, including casements and hung windows, involve design tradeoffs that create more potential for air infiltration. [Understanding Residential Air Infiltration | Fenestration and Glazing Industry Alliance](https://fgiaonline.org/resources/homeowner-resources/residential-air-infiltration/). Scope: FGIA homeowner education about residential product operation and air infiltration; it does not assign a universal acceptable air-leakage value to every project.. Accessed: 2026-09-07. - FGIA states that window, door, and skylight lifespan and performance depend on component and manufacturing quality, building design and construction practices, installation, climate and exposure, care and maintenance, and replacement of worn parts. [Maximize Window, Door & Skylight Lifespan | Fenestration and Glazing Industry Alliance](https://fgiaonline.org/resources/homeowner-resources/caring-for-your-windows-doors-skylights/). Scope: FGIA homeowner maintenance and service-life context; no universal service-life number is claimed.. Accessed: 2026-09-07. - FGIA describes the AAMA Gold Label program as independent laboratory testing of a product sample with ongoing inspections of manufacturing processes for continued compliance with applicable standards. [AAMA Gold Label Certification Program Overview | Fenestration and Glazing Industry Alliance](https://fgiaonline.org/product-certification/gold-label-certification/). Scope: FGIA certification-program description; it supports checking certification evidence but does not establish a project’s adopted code or installation quality.. Accessed: 2026-09-07. - Andersen’s installation configurator creates product- and construction-specific instructions covering rough-opening preparation, sealing, shimming, fastening, flashing, and water management, and states that attachment method, fastener selection, and code compliance are the responsibility of the architect, owner, contractor, installer, and/or consumer as applicable. [Installation Guide Configurator | Andersen Windows](https://www.andersenwindows.com/support/window-door-installation/installation-guide-configurator). Scope: Andersen product installation guidance and stated responsibility boundary; apply only to the selected Andersen product and project installation context.. Accessed: 2026-09-07. - Pella separates installation instructions for new construction, full-frame replacement, pocket replacement, and accessories or assemblies, and advises reading the product warranty before purchasing or installing. [Window Installation Instructions | Pella](https://www.pella.com/professionals/installation-instructions/windows/). Scope: Pella’s published installation-resource taxonomy and purchase warning; choose the exact product and construction condition rather than generalizing across Pella products.. Accessed: 2026-09-07. - Pella says product warranty coverage comes with the product, installation instructions must be followed for product warranty coverage, coverage varies by component and service labor, and a serial number, purchase order, or order number may be needed for parts or warranty service. [Window and Door Warranties | Pella](https://www.pella.com/support/warranties/). Scope: Pella’s current warranty FAQ and service-record guidance; exact written warranty, product, purchaser, installation, and project conditions control.. Accessed: 2026-09-07. - FGIA recommends keeping tracks and weep systems clear, checking weatherstripping, hardware, and caulking, inspecting regularly, and avoiding pressure washers and abrasive or caustic cleaners that can damage window components. [Maximize Window, Door & Skylight Lifespan | Fenestration and Glazing Industry Alliance](https://fgiaonline.org/resources/homeowner-resources/caring-for-your-windows-doors-skylights/). Scope: FGIA general homeowner care guidance; manufacturer-specific owner manuals and warranty instructions take precedence for a selected product.. Accessed: 2026-09-07. - FGIA reports that the 2026 edition of AAMA/WDMA/CSA 101/I.S.2/A440, the North American Fenestration Standard for windows, doors, and skylights, has been published and is reviewed every five years under the participating organizations’ agreement. [2026 North American Fenestration Standard Published | Fenestration and Glazing Industry Alliance](https://fgiaonline.org/about/news-and-blogs/2026-north-american-fenestration-standard-published/). Scope: FGIA announcement about publication of the 2026 NAFS edition; publication does not mean the edition is adopted by the project jurisdiction or required for every opening.. Accessed: 2026-09-07.