Category: air/vapour barrier

Wade Engineering > air/vapour barrier

The difference between vapour barrier and air barrier

Moisture problems in walls have been attributed in large measure to two mechanism: vapour diffusion, and now more importantly, air leakage, specifically the deposition of moisture by moist air exfiltrating through the building envelope. While significant technology dated to vapour diffusion control (the vapour barrier) exists (i.e. calculation procedures, regulatory requirements, material standards and performance […]

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Vapor Barriers and Wall Design

Good design and practice involve controlling the wetting of building assemblies from both the exterior and interior and different climates require different approaches. Ideally, building assemblies would always be built with dry materials under dry conditions, and would never get wet from imperfect design, poor workmanship or occupants. Unfortunately, these conditions do not exist. Good design […]

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