Window replacement contract template
Replacement windows are made to order, and that changes the contract: once you've measured and the order is in, the customer can't simply change their mind. This template covers the windows by location and size, the installation method, the custom order, lead-safe work in older homes, trim and disposal, and both warranties. Read it below, then send it from SignMaster.
Updated November 5, 2026 · 4 min read
The contract
Gray blanks are yours to fill in before you send. Each signer fills in the blanks in their color.
- You, before sending
- Homeowner
- Window installer
Window Replacement Contract
This Window Replacement Contract (the "Contract") is made on Contract date between Window company name, license number License number (the "Contractor"), and Homeowner name (the "Homeowner").
1. The property
The work will be done at Property address. Year the home was built, if known: Year built.
2. The windows
The Contractor will supply and install Number of windows windows and Number of doors doors, as detailed in quote Quote number and date and below:
- Maker and product line: Window maker and line.
- Frame material and color: Frame material and color.
- Glass package: Glass package.
- Grids: Grids.
- Locations and sizes: Locations and sizes.
3. Measuring and ordering
The Contractor will take final measurements on or about Final measurement date and order the windows on or after Order date, once any cancellation period under section 12 has ended. The maker's lead time is about Lead time in weeks weeks. Windows are made to order and can't be returned once ordered. A change to size, color, glass or grids after ordering is charged at the cost of the replacement units plus any restocking fee, and starts a new lead time.
4. Installation
Installation type: Insert or full-frame. The Contractor will remove the old sashes or frames, set and fasten the new units level, plumb and square, insulate the gaps around them, and flash and seal them against water. If the Contractor finds rot or damage in a frame, sill or wall opening, it will show the Homeowner and price the repair, at Rot repair price per opening per opening or as quoted, before continuing at that opening.
5. Trim and finishing
- Interior trim: Interior trim work.
- Exterior trim or capping: Exterior trim or capping.
- Painting or staining: Painting included or not.
- All joints between the new units and the house will be caulked inside and out.
6. Lead-safe work
If the home was built before 1978, the Contractor will follow the lead-safe work practices of the EPA's Renovation, Repair and Painting Rule and any state program, using certified renovators. Firm certification number: Lead-safe certification number.
My home was built before 1978, and I received the EPA's Renovate Right pamphlet before work started.
7. Protection, access and disposal
The Homeowner will clear furniture and valuables from in front of each window. Taking down and putting back blinds and curtains is Window coverings. The Contractor will cover floors and furniture near the work, close every opening before leaving each day, and haul away the old windows and debris.
8. Performance and energy
Ratings such as U-factor and solar heat gain coefficient are the maker's ratings for the product. The Contractor makes no promise about savings on energy bills, which depend on weather, rates and how the home is used. New, tighter windows can show condensation when indoor humidity is high; that is not a defect.
9. Price and payment
The total price is Contract price. A deposit of Deposit is due when this Contract is signed, and the balance when installation is complete. Accepted payment methods: Payment methods.
10. Warranties
The Contractor warrants its installation, including leaks around the frames and units that don't operate properly because of the installation, for Installation warranty in years year(s). The windows carry the maker's product warranty, which the Contractor will register in the Homeowner's name. These warranties do not cover glass broken after installation, condensation from indoor humidity, misuse, or changes by others.
11. Changes
Changes to the windows, price or schedule must be in writing signed by both parties, and are priced as section 3 describes once the windows have been ordered.
12. Right to cancel and general terms
If this Contract was signed at the Homeowner's home or anywhere other than the Contractor's place of business, the Homeowner may cancel it within three business days, or longer where state law allows, and the Contractor will provide a written notice of cancellation explaining how. The Contractor carries general liability insurance. This Contract is the whole agreement and is governed by the laws of the state of State. Electronic signatures count as original signatures.
Homeowner contact details
Phone: Homeowner phone Email: Homeowner email
I understand that the windows are made to order and that changes after ordering cost extra, as section 3 explains.
Homeowner
Window installer
Opens it in SignMaster as a template you can edit and send.
A starting point, not legal advice. Have a lawyer review it for your state and situation.
On this page
Made to order, so put it in writing
Most replacement windows are built to your measurements, in the color, glass and grid pattern the customer picks, so a canceled order often can't go back. The contract has to say when you'll order, what the deposit covers, and what a change of size, grid or color costs afterward. It also has to be honest about performance: new windows can make a room quieter and more comfortable, but a promised figure on energy bills is one you don't control.
Use it for insert replacements and full-frame tear-outs. Entry and patio doors fit too; list each one as its own line in the schedule.
What the template covers
- The windows: the count, maker and line, frame material and color, glass package, grids, and each location and size, tied to your quote.
- Measuring and ordering: your final measurement date, an order date after any cancellation period, the lead time, and the cost of changes once ordered.
- Installation: insert or full-frame, fastening, insulation, flashing and sealing, and a price for rotted sills or frames.
- Trim and finishing: interior trim, exterior capping, caulking, and whether painting is included.
- Lead-safe work: your firm certification number and the owner's receipt of the Renovate Right pamphlet for homes built before 1978.
- Protection and disposal: clearing window areas, blinds and curtains, closing every opening by day's end, and hauling the old windows away.
- Performance: the maker's ratings, no promise of bill savings, and why condensation isn't a defect.
- Warranties: your installation warranty and the maker's product warranty, registered for the owner.
Window replacement mistakes
- Ordering from the sales measurement. Take final measurements yourself before ordering, and put that date in the contract.
- Letting a grid pattern change after the order. Custom windows rarely go back, so make post-order changes a paid change with a new lead time.
- Selling savings. Quote the maker's ratings, like U-factor and solar heat gain, and leave utility bill promises out of the signed terms.
- Treating an older home like a new one. Pulling windows from a home built before 1978 disturbs painted surfaces, and the EPA's rule applies however small the job feels.
- Installing over rot. A rotted sill under an insert window will take the new window with it. Price the repair and get approval before you cover it up.
Lead-safe rules apply to window jobs in older homes
Under the EPA's Renovation, Repair and Painting Rule, window replacement is never treated as a minor repair, so in most homes built before 1978 the certification, lead-safe practices and pamphlet requirements apply even to a single window. Section 6 of the template records your certification number and the owner's receipt of the pamphlet.
How to send it with SignMaster
- 1
Open the template
Choose Use this template. The homeowner signs first, then your company.
- 2
List the windows
Fill in the gray blanks with the count, maker, colors, glass and the location and size of each opening, or name your quote by number and date and include its unit-by-unit page in the same envelope.
- 3
Record the lead details
Fill in the year built and your firm certification number. For a home built before 1978, the homeowner checks the box confirming they received the Renovate Right pamphlet when they sign.
- 4
Sign at the kitchen table
Window sales usually close in the home. Use Sign in person and hand over the cancellation notice, then set the order date in section 3 for after the cancellation period ends.
- 5
Countersign and order
When you countersign, both of you get the PDF with its certificate of completion. Place the order once the final measurements are done and the cancellation window has closed.
Apartment buildings and HOAs
For condo buildings and HOAs replacing windows community-wide, the same contract goes to many owners with a different window count and price. Name your spreadsheet columns after the gray blanks, like Property address, Number of windows and Contract price, and bulk send one contract per owner. Each owner signs for their own unit and gets their own signed copy.
Questions? Answers.
Can a customer cancel a custom window order?
If they signed at home, they may have a legal right to cancel within three business days, which is why the template orders after that period. Once the windows are ordered, later cancellations and changes are charged as section 3 sets out.
Do window installers need lead certification?
For paid work in most homes built before 1978, yes. The EPA's Renovation, Repair and Painting Rule requires a certified firm and lead-safe practices, and window replacement doesn't qualify for the small-job exemption.
What's the difference between insert and full-frame replacement?
An insert window fits inside the existing frame, so interior trim and siding stay put. Full-frame replacement removes the old frame to the rough opening, which costs more but lets you fix rot and flashing. Section 4 records which you're doing.
Should a window contract promise energy savings?
No. List the maker's rated performance and leave savings out. Bills depend on weather, rates and how the home is used, none of which the installer controls.