Airtight & Weatherproof

Efficient, durable and airtight wall assemblies


Tyvek home wrap left exposed to wind and UV rays

Weather barriers - what they do and how to install them

Weather barriers (or more accurately water-resistive barriers) keep bulk water away from vulnerable building components and allow walls to dry at the same time.

Problem areas of air leakage in a home and blower door test being cond

Balancing air pressure in a house: "Your house sucks." "Oh yeah? your house blows!"

Odds are that at any given time the air pressure in your house is out of balance and either drawing air in or forcing it out. Learn the causes, the effects a...

Exterior air barrier membrane © Ecohome

How to install an air barrier for reduced air leakage

Air leakage is responsible for a large portion of the heat loss and moisture damage in walls.

Interior sheathing wood frame construction

Interior sheathing as an air and vapour barrier

3/4 inch OSB sheathing on the interior can be an excellent air barrier and a great vapour barrier as well.

Air barriers are essential to a properly functioning wall system

What is an air barrier?

Approximately 100 times more water vapour is carried into our walls by air leakage than is carried by vapour diffusion. That makes air barriers 100 times mor...

Vapor retarder primer

Replacing polyethylene vapour barriers with paint

Vapour retarder primers can be twice as effective as the requirements laid out in our national building code regarding vapour barriers.

The difference between air barriers and vapour barriers

The Difference between air barriers and vapour barriers

Can a house be too airtight? No it cannot. The difference between air barriers and vapour barriers is often confused. Also confused, is which one is more imp...

Choosing house sheathing

Which is better, OSB or plywood sheathing?

Both plywood and OSB have benefits and drawbacks, the most important thing is to understand and respect their limitations to avoid a wall failures.

Insulating crawlspaces

How to insulate crawlspaces

Crawlspaces are very rare as part of a new home construction nowadays in Canada. If you've got one here's how to fix it.

Spray polyurethane foam on basement walls prevents mold and midlew

Basement renovations: how to prevent mould when retrofitting basements

Why are basements mouldy? Because we build walls so they can't dry. Simple changes in wall design will result in mould-free durable basements.

Exterior damp proofing and drainage mat to protect basements from wate

Best practices for basement insulation in new home construction

Basements in Canada face serious challenges: fluctuating water tables, surface floods, thermal shock, radon gas infiltration, condensation, mold, mildew, rot...


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