Vapor barrier / Green Building & Sustainable Home Renovation Information & Advice

...barrier primer © Benjamin Moore Interior gypsum board: Latex paint (or vapour retarder primer) is recomended as an interior vapour control layer below grade. It is most important to not include a polyethylene vapour barrier or other vapour impermeable materials that prevent walls from drying. 6 mil poly vapour barrier...

...barrier. Notice the difference between the studs against the foundation and the studs that formed an interior division wall; the vapour barrier did not protect the exterior wall from damage and mold growth. It caused the damage by prevented the wall from drying to the interior and instead sealed the moisture in. Read h...

...vapor permeance. By moving the sheathing to the inside, you are simply letting it live up to its full potential as an air barrier and vapor barrier, and eliminating the need to install a separate product to do that job. One of the benefits of OSB as an air barrier is that it is solid. A polyethylene or foil air barrier...

...vapor is carried into our walls by air leakage than is carried by vapor diffusion. That makes air barriers 100 times more important than vapour barriers, so why is no one talking about them? We don't talk about air barriers because we are too busy talking about vapor barriers. An air barrier is not something you walk i...

...vapor semi-permeable interior finishes. The following main principles are recommended: Avoid vapor barriers where vapor retarders will work, avoid vapor retarders where vapor permeable materials will work. Avoid the installation of a vapor barrier on both sides of the wall assembly. Avoid using poly, foil faced batts,...

...barriers and vapor barriers The job of a vapor barrier is to prevent vapor diffusion, and the job of an air barrier is to stop air leakage through differences in air pressure. A wall system should have one vapor barrier, but can have many air barriers. A vapor barrier can act as a very effective air barrier, but an air...

...barrier when installed with multiple layers and offset joints as it will not absorb moisture from the ground.  •    Building on high ground eliminates any risk of flooding. •    A slab on grade with a frost-protection skirt designed for its specific climate will not heave.  •    EPS foam with parging on it or an ext...

...barriers became a part of the building envelope shortly thereafter.  Vapour barriers stopped the flow of moist air through walls, this of course led to a buildup of moisture in homes, and condensation on windows was common place and hard to stop. This led to a build up of mould and mildew in homes. Modern day airtight ...