What is the envelope?
The envelope is everything separating inside from outside: foundation, walls, siding, membranes, doors, windows and roof. It must control water, air, heat and vapour.
Exterior signs
- Cracked, warped or loose siding
- Missing or poorly installed flashing above openings
- Cracked sealant joints
- Icicles or ice dams at the roof edge
Interior signs
- Drafts near outlets and windows
- Water stains on ceilings or exterior walls
- Mould in exterior wall corners
- Rooms that are hard to heat
Official sources
General information only, not legal or financial advice. Rules and programs change: always check with official sources.
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