Metro Vancouver has a large stock of homes built between the 1950s and 1990s — many with their original windows still in place. Replacing windows in these homes is different from installing in new construction. The openings, framing, and even local regulations add layers of complexity that homeowners should understand before getting quotes.
Assess the Frame Before Anything Else
In older homes, the rough opening around the window may have settled, rotted, or been altered during previous renovations. Before selecting new windows, have a professional assess the structural condition of the rough opening, the sill, and the surrounding framing. If rotted wood isn't addressed, your new windows will underperform regardless of their quality.
Tip: In Vancouver's wet climate, wood rot at the sill is extremely common in pre-1990 homes. Budget for potential framing repairs when planning your window project — typically $200–$600 per opening.
Retrofit vs. Full-Frame Replacement
Retrofit (Insert) Replacement
The new window is inserted into the existing frame, leaving the exterior casing and interior trim intact. This is less disruptive and generally less expensive, but it only works if the existing frame is structurally sound and square. It also reduces the glass area slightly.
Full-Frame Replacement
The entire window assembly — frame, sill, and all — is removed and replaced. This is the right call when the frame is rotted, out of square, or when you want to change the window size or style. More work, more cost, but gives you a fresh start and better performance.
| Retrofit | Full-Frame | |
|---|---|---|
| Cost | Lower | Higher |
| Disruption | Minimal | Moderate |
| Frame condition needed | Sound and square | Doesn't matter |
| Glass area | Slightly reduced | Same or larger |
Heritage and Character Homes
If your home is in a heritage area or designated as a character home in North Vancouver, Vancouver, or other Metro municipalities, there may be restrictions on window design, materials, or profiles. Vinyl windows with thick frames may not be permitted on street-facing elevations. Check with your municipality before committing to a product.
In these cases, thermally broken aluminum frames or fiberglass windows often meet both the performance and aesthetic requirements while satisfying heritage guidelines.
Watch Out for Asbestos and Lead Paint
Homes built before 1980 may have lead paint around window frames and potentially asbestos in caulking compounds. Disturbing these materials during window removal requires proper handling procedures. Any reputable contractor working on a pre-1980 home should discuss this with you upfront — if they don't mention it, ask.
BC Building Code and Permits
In most Metro Vancouver municipalities, replacing a window of the same size in the same location does not require a building permit. However, if you're changing window size, adding new openings, or working on a heritage property, a permit is likely required. Unpermitted work can create problems when you sell.
Getting the Right Quotes
When getting quotes for an older home, a good contractor will:
- Visit the property before quoting (photos aren't sufficient)
- Inspect the rough openings and existing frame condition
- Clearly state whether the quote covers retrofit or full-frame replacement
- Include any anticipated framing repairs as a separate line item
- Specify the brand and model of windows being supplied
A quote that doesn't include a site visit should be treated with skepticism — it almost certainly doesn't account for the actual condition of your openings.