"building code vapour barrier"

building code vapour barrier / Green Building & Sustainable Home Renovation Information & Advice

Air and vapour barriers

Replacing polyethylene vapour barriers with latex paint vapor control

...Building Code of Canada & local US building code regarding water vapour diffusion, with a vapour permeance in the area of 30 to 36 ng, which is about half of the 60 ng often allowed by code. Vapor barrier primer meets building code © Ecohome So concerns that primers are insufficient to control vapour dif...

Radon in Homes - Mitigation

How to install vapor and radon barriers below slab floors

...vapour barrier, we used a 10 mil barrier and a radon evacuation stack to lower radon gas levels in homes, research shows (see below) that thicker membranes offer more effective protection. In this video we are installing a 10 mil vapour barrier but we would probably use a thick vapor barrier like this one in future as...

Air and vapour barriers

Interior sheathing as an air and vapor barrier

...vapour barrier. Ideally we'd have no vapor barrier in summer; but short of that we should at least have one that allows as much drying to the interior as possible without sacrificing its winter performance. So the closer your vapour barrier is to 60NG, the better. For the sake of context it should be noted that polyeth...

Air and vapour barriers

What is an air barrier?

...barrier products pretty much ensures that you won't have one, as there are few aspects to building enclosures that are less forgiving than the air barrier. Where to install an air barrier: A building envelope should only ever have one vapour barrier, and it goes on the warm side of the insulation. Air barriers on the o...

Insulation and soundproofing

Does a home need a radiant barrier in walls and ceilings? When is it worth it?

...barriers used for air barriers and in some cases like REMOTE Walls as a vapor barrier, and we think that the money you invest in reducing heat loss would be better invested as an additional inch of insulation rather than dropping it on radiant barriers. Now you know more about radiant barriers in homes, find more ...

Healthy indoor air quality

Why you should never Install air-con in a home with a vapor barrier

...building envelopes. "Building codes are making you do stupid things. The laws of physics trump code." - Joe Lstiburek This article was inpired by building scientist Joe Lstiburek, one of the most globally trusted and well-known names in building science who has left an indelible mark on the building codes of the Un...

Air and vapour barriers

How to install an air barrier for reduced air leakage - video

...barriers and vapor barriers: The job of a vapor barrier is to prevent vapor diffusion (walls absorbing humidity from the air), and the job of an air barrier is to stop air leakage through individual holes. A wall system should have one vapor barrier, but it can have many air barriers. A vapor barrier can act as a very ...

Air and vapour barriers

Choosing the right house wrap / weather barrier, which is best?

...building materials based on their permeability rates: Vapour impermeable 0.1 perms or less Vapour semi-impermeable 1.0 perm or less and greater than 0.1 perms Vapour semi-permeable 10 perms or less and greater than 1.0 perms Vapour permeable Greater than 10 perms Understanding vapour permeabil...

Air and vapour barriers

Aerobarrier home and attic air-sealing spray

...barrier, which can seal entire homes. How Aerobarrier spray air barrier works: Using standard blower-door testing equipment, a house is pressurized to between 50 and 100 Pascals. Aerosol nozzles are placed through the home which then spray Aerobarrier water-based liquid acrylic sealant. The elastic particles in Aeroba...

Crawl spaces

How to insulate crawlspaces properly as part of renovating an older home

...vapour barrier is required in addition to spray foam. Building codes change and can vary by region, so confirm this locally, but currently The National Building Code in Canada for example allows foam insulation without fire protection on crawlspace walls that are less than 5 feet in height. An additional option, for wa...

Air and vapour barriers

The difference between air barriers and vapor barriers

...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...