The frame decision
Frame materials: vinyl, fiberglass, wood, and aluminum
The frame decides how the door looks, how it insulates, and how much attention it demands from you.
Vinyl (uPVC)
is the workhorse of door replacement in Toronto, and most of the patio doors we install are vinyl. It never needs paint, it shrugs off rain and salt spray, and multi-chamber vinyl frames insulate well. Quality varies by manufacturer, so ask what brand is on your quote and what the frame warranty says. The same logic applies if you are pricing vinyl windows for the rest of the house.
Fiberglass
is stronger and more stable than vinyl in extreme temperature swings, and you can paint it. It costs more, and for a patio door the comfort difference over good vinyl is modest.
Wood and wood-clad
frames bring the warmest look and suit heritage homes. They also carry the highest price and the most maintenance. Clad versions protect the exterior with aluminum or fiberglass skin while keeping wood inside.
Aluminum with a thermal break
gives you slim, modern sightlines and huge glass. Make sure the words "thermally broken" appear on your quote. Old-style aluminum without a thermal break is exactly the freezing, sweating frame you are trying to get rid of.


















