Installation du pare-vapeur
Point critiqueVapor barrier must be on the warm side of insulation (interior in cold climates, exterior in hot-humid climates). Continuous with sealed seams.
Norme
Vapor barrier must be on the warm side of insulation (interior in cold climates, exterior in hot-humid climates). Continuous with sealed seams.
Comment vérifier
1. Verify vapor barrier is on the correct side (warm-in-winter side in heating climates)
2. Check for continuity — no gaps, holes, or tears
3. Verify seams are overlapped minimum 6" and taped
4. Check around penetrations (pipes, wires, boxes) — sealed with tape or caulk
5. In crawl spaces: verify 6-mil minimum poly covers entire ground surface
6. Under slabs: verify 10-mil minimum poly under entire slab area
7. Check that vapor barrier does not trap moisture in wrong location
8. Verify compatibility with insulation type (some insulation has built-in vapor barrier)
Problèmes fréquents
- Vapor barrier on wrong side (traps moisture in wall — rot and mold)
- Gaps or tears in barrier (moisture bypasses)
- Unsealed seams (moisture pathway)
- Penetrations not sealed
- Two vapor barriers (both sides) — traps moisture with no escape
- No vapor barrier in crawl space (moisture from soil enters house)
- Undersized for application (less than recommended mil thickness)