5 Reasons Why Building Airtightness Matters

Airtightness is one of the five core principles of ultra-low energy buildings. Here's what a tight building envelope gives you: ? Better insulation — Less heat escapes. Think of it like a thermos: if the cap leaks, it doesn't keep warm. ? No condensation or mold — Stops moisture from creeping into walls and interior surfaces. ? Noise reduction — A tighter envelope means better sound insulation and more comfort. ? Fire safety — Slows the spread of toxic gases, buying critical escape time. ? Clean indoor air — Works with HRV systems to keep outdoor pollution out. Airtight sealing around duct penetrations makes this possible. Plus, airtight materials are waterproof — no more leaks around window openings. Not just for passive houses. Airtightness solutions work equally well for old building retrofits and standard energy-efficient construction. ? Watch the video to learn more.