What to know
- Ask every quote to name insert versus full-frame — the two jobs are not comparable.
- Full-frame is the right call when there is rot, water damage, or you want the original glass area back.
- Installed price should include removal, flashing, insulation, interior returns and disposal.
Two different jobs
Replacement is not one product. An insert (retrofit) leaves the existing frame in the wall and slides a new sealed unit inside it. A full-frame replacement strips the opening back to the rough framing so the installer can inspect, insulate, re-flash and set a new frame.
Inserts are faster and usually cheaper. They also leave a double frame, which shrinks the glass and hides rot behind the old wood or aluminum. Full-frame costs more and disturbs more trim, but it is the honest repair when the opening has been leaking.
When inserts are fine
Inserts work when the existing frame is square, solid and dry, the siding and interior returns can stay, and you accept a slightly smaller glass area. Many vinyl replacements in 1970s–1990s bungalows are done this way because the original wood frames are still serviceable.
- No soft wood, rusted aluminum, or staining below the sill
- Sash still operates, even if the glass is fogged
- You are not trying to change the opening size or style family
What a complete quote should include
Two quotes that look far apart are often pricing different scopes. Ask for a line-item that covers the method, glass package, installation labour, interior and exterior finishing, and disposal. If a bid is silent on flashing or interior returns, assume you will pay extra later.
Ready for numbers on your opening?
The estimator uses your province, window count and style to produce a range and match local companies.