Air Sealing & Vapour Barriers
Air sealing and vapour barrier installation are the essential companion services to any insulation project in New Brunswick, because even the highest R-value insulation cannot perform effectively if w
Find an Insulation ProAbout Air Sealing & Vapour Barriers
Air sealing and vapour barrier installation are the essential companion services to any insulation project in New Brunswick, because even the highest R-value insulation cannot perform effectively if warm, moisture-laden interior air leaks through gaps, cracks, and penetrations in the building envelope into cold wall cavities and attic spaces.
Professional blower door testing quantifies a home's total air leakage rate in air changes per hour (ACH), identifying the specific locations where sealing will deliver the greatest energy savings — typical older NB homes test at 8-15 ACH50, while the current NB Building Code targets 3.5 ACH50 or lower for new construction.
Comprehensive air sealing combined with properly installed 6-mil polyethylene vapour barriers on the warm side of exterior walls and ceilings prevents the moisture-driven condensation, ice formation, and mould growth that plague poorly sealed New Brunswick homes throughout the Maritime heating season.
What's Included
- Blower door testing to measure air leakage and identify sealing priorities
- Caulking and spray foam sealing of gaps around windows, doors, and penetrations
- Weatherstripping for doors, attic hatches, and operable windows
- 6-mil polyethylene vapour barrier installation on warm side of walls and ceilings
- Acoustic sealant at vapour barrier joints, electrical boxes, and framing connections
- Pre- and post-sealing energy audit support for rebate qualification
Ready to Get Started?
Contact us today for a free estimate on your air sealing & vapour barriers project. We'll connect you with experienced insulation contractors in New Brunswick.