Vapor barrier / Guides

The difference between air barriers and vapour barriers
Air and vapour barriers

The Difference between air barriers and vapour barriers

...vapor barrier, but can have many air barriers. A vapor barrier can act as a very effective air barrier, but an air barrier does not (and should not) always stop...

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

Replacing polyethylene vapour barriers with latex paint vapor control

...vapor barriers where vapor retarders will work, avoid vapor retarders where vapor permeable materials will work. Avoid the installation of a vapor barrier on ...

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

What is an air barrier?

...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 so...

Exterior air barrier membrane © Ecohome
Air and vapour barriers

How to install an air barrier for reduced air leakage

...barrier, but can have many air barriers. A vapour barrier can act as a very effective air barrier, but an air barrier does not (and should not) always stop vapo...

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

...barrier and vapor barrier , by using a high-performance building tape to seal the joints and the Larsen Trusses are effectively a cost-effective and lightweight...

Poly vapour barriers in air conditioned houses can cause mold and rot
Healthy indoor air quality

Why you should Never Install Air-Con in a Home with a Vapor Barrier

...barriers with Vapor barriers either, they're not the same... Adding to that problem is that we have introduced engineered wood products that are far more suscep...

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

Interior sheathing as an air and vapour or vapor barrier

...barrier and vapour barrier. Taped OSB sheathing as air barrier © Durfeld Constructors There is no question that this technique also presents a new chall...

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

Weather barriers - what they do and how to install them

...barriers or WRBs, sometimes weather-resistive barriers, but in practical terms they are more commonly called housewraps and weather barriers. With so many optio...

Building science for LEED v4 wall design made easy
Concept and design

Building science for LEED v4 wall design made easy - video

...barrier. See our pages on vapour and air movement & the difference between air & vapor barriers to get a better idea of how this works, and why it makes so much...

Celsius Solar Igloo
Solar thermal collectors

Celsius: The solar heated igloo!

...vapor barrier (interior) and the air barrier (exterior). Us: How is the sun used to heat and power the igloo? L. McC : Recessed in the south wall are solar air ...

Choosing a building envelope
Wall assemblies - new construction

Choosing a building envelope - starting with the perfect wall

...vapor barrier : Although commonly known as a 'vapour barrier' a better term to use would be a vapour retarder. A moisture control barrier should slow diffusio...