Trimless PVC Window Jamb Extensions

Designed for Canadian homes. Built to last. Durable, clean-lined, and moisture-resistant, our PVC jamb extensions are custom cut to fit your exact specs.

Why Choose Our Trimless Jamb Extensions?

Moisture-Resistant & Durable

We’re one of the only Canadian manufacturers offering trimless jambs that resist swelling, warping, and mold—perfect for humid areas and new builds.

Custom-Cut for a Perfect Fit

Each jamb extension is precisely cut to your required dimensions, based on square footage, for clean installation and zero waste.

Modern Trimless Design

Forget traditional casing. Our clean-line design blends into drywall for a sleek, contemporary look—no trim required.

4' x 10' Material allows for any depth window

We stock ¾″ and 5/8" PVC material so we can truly build a jamb for any window size!

Primed and Ready to Paint

Your jambs arrive smooth and primed for paint—saving you time and labour during finishing. Just install and go.

How to Measure

1. Measure Window Length & Height

Measure your window's length and height from edge to edge. The exact location will depend on if you have Drywall Returns or if it is a flat window.

2. Determine Your Depth Depth is the distance from the window frame to the finished wall surface (typically drywall).

*Trimless Jambs are installed prior to drywall so the depth measurement will go to the outside of the framing. The corner bead will overlap the jamb extension and the drywall. If your window has Drywall Returns, please put the tape measure inside the drywall return and measure out to the framing to get an accurate measurement.

For Help With Measurements:

See the order forms on the "Resources Tab" for specific window types

Installation Benefits & Material Advantages

Clean install with no casing or bulky trim
Moisture-resistant and durable in Canadian climates
Primed and ready to paint — no prep needed
Custom-cut to your exact measurements
Modern, flush-mounted aesthetic
Works with drywall returns or full-wrap designs

Ready to Order?

Submit your measurements now and we’ll get back to you with an accurate quote — fast.

Get a Quick Quote

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