What to know
- The sash compresses onto the weatherseal, which is why casements usually beat sliders on air leakage.
- Cranks and operators are the service item — ask about replacement parts.
- Egress and screen operation differ from a slider; confirm bedroom code if you are changing style.
Why they are the Canadian default
A casement hinges at the side and closes with a crank so the sash is pulled tight against the frame. That compression seal is why they test tighter than most sliders for air leakage, and why they show up on a huge share of Canadian replacement quotes — especially on wind-exposed walls.
Hardware and screens
The operator (crank) and hinges take the wear. A good series uses stainless or protected hardware and has parts still available a decade later. Screens typically mount on the interior, which is easier to clean than a slider screen in a track.
Ready for numbers on your opening?
The estimator uses your province, window count and style to produce a range and match local companies.