What is an air barrier / Guides

Air barriers are essential to a properly functioning wall system
Air and vapour barriers

What is an air barrier?

...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...

Vapor retarder latex primer instead of polyethylene sheet
Air and vapour barriers

Replacing polyethylene vapour barriers with latex paint vapor control

...barrier is to control vapour diffusion, the job of the air barrier is to control air leakage. 6 mil poly can work effectively as an air barrier if it is caref...

Interior sheathing as air & vapor barriers in wood frame construction
Air and vapour barriers

Interior sheathing as an air and vapour or vapor barrier

...an additionally act as both an air barrier and vapour barrier. Taped OSB sheathing as air barrier © Durfeld Constructors There is no question that this ...

Blower Door Tests - What's the Cost & Who Does Them?
Air and vapour barriers

What is a blower door test? What's the cost? How do you find a company to do one?

...is powerful exhaust fan draws air in from any existing hole in your air barrier no matter how small it is. The operator then determines your ACH (air changes ...

Off grid, passively heated and cooled house in the Gatineau Hills, Que
Off-grid and Net-Zero Housing

Off grid and passively heated, this house in Low, Quebec is aiming for LEED certification

...is design began with the basic principles of passive heating and cooling - invest in really good windows, face as many of them south as you can to gain heat, an...

Air and vapour barriers

Aerobarrier home and attic air-sealing spray

...an exterior air barrier, or you can wait until the drywall is completely installed and mudded. Another advantage of this product is realized with multi-unit b...

Tyvek home wrap left exposed to wind and UV rays
Air and vapour barriers

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

...and-stick' membranes, and if you'd like a fancier word for them, go with this - self-adhering air and water-resistive barriers. Peel-and-stick vapour-permea...

Frost in attic
Roof assemblies - renovation

Why is there frost in my attic?

...and it isn't a huge problem if it is able to melt and evaporate so that wood can dry. It becomes a more serious problem when the quantity of frost isn't able ...

Choosing a building envelope
Wall assemblies - new construction

Choosing a building envelope - starting with the perfect wall

...is an environmental separator between outside and inside . Its intent is to slow the movement of heat and air between outside and in, and manage moisture infilt...

Passive House wall system ; Larsen Trusses & dense-packed cellulose insulation
Wall assemblies - new construction

Larsen truss wall systems with double-stud construction & extra insulation for new homes & energy efficient home renovation

...is used as the air barrier and vapor barrier , by using a high-performance building tape to seal the joints and the Larsen Trusses are effectively a cost-effect...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...and studs is crucial to allow a seamless blanket of insulation to create an air and vapour barrier. Unprotected wood touching concrete will wick moisture and ev...