R-Value & Canadian Winters
Insulation matters here more than in milder climates. An uninsulated thin steel door transfers cold into the garage and can ice up at the bottom seal. Look for polyurethane-filled panels and a thermal break between inner and outer skins.
- R-8 to R-12 suits many attached garages
- R-16+ helps when rooms sit above or beside the bay
- Pair insulation with a fresh bottom seal and perimeter weatherstrip