D&D Exterior Finishing · Practical guide

Window Replacement Process: From Survey to Handover

Window replacement starts before installation day. The important decisions are which frames can stay, exactly what will be ordered, and how hidden damage or finishing changes will be handled.

By D&D Exterior Finishing · Updated September 9, 2026 · About 3 min read

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Gabled house with tall windows, triangular glazing and vertical siding
Gabled house with tall windows, triangular glazing and vertical siding.

Survey and confirm the order

Have each opening assessed individually. Record its location, operating style, frame condition, surrounding wall material and any history of leaks. Approximate homeowner measurements can support a discussion, but final ordering dimensions and clearances belong to the supplier or installer’s measurement process.

Before manufacture, review the window schedule: size, operation, handing where relevant, frame finish, glass, grilles, hardware and ratings. Identify insert or full-frame work for each opening and who resolves any required approvals. Ask for the supplier’s current lead time and the consequences of a change; a generic manufacturing timeline is not a delivery commitment.

Prepare the home and manage each opening

Agree on access, furniture clearance, floor protection, debris removal and how rooms will be secured while work proceeds. Discuss weather contingencies and overnight protection. If pets or children will be present, establish a practical separation from the work area.

Once the old unit is removed, the installer can assess the material actually exposed by the chosen method. Unexpected rot or water damage should be documented, with the repair and cost change agreed before it is concealed. New flashing and the air seal must match the product instructions and wall assembly.

Inspect the result and collect the paperwork

Confirm interior and exterior make-good against the contract, then operate every window. Check locks, screens, cleaning functions and visible finish damage. Ask for a demonstration of the normal operating and maintenance steps, including drainage openings that must remain clear.

Keep the final window schedule, product labels, warranty terms, invoices and photos of concealed repairs. List any unfinished items and who will return to complete them. An insert preserves more of the old assembly; full-frame work exposes more of it. Neither description replaces an agreed scope and a documented handover.

Technical references

Discuss your exterior projectDescribe the work before choosing a date or service scope.
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Select the exterior work and note the current material and repair or replacement needs.

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