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WRB / Guides

Wood and organic materials

Which is better, OSB or Plywood for Roofs, Walls & Floors?

...WRB results in 1.88 perms 2 perm 7/16 OSB sheathing with a 5 perm WRB results in 1.43 perms That may not seem like a lot, but when you are that close to t...

Wall assemblies - new construction

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

...WRB) Strapping Exterior cladding * Both homes are built on a raft-slab ‘ slab on grade ICF Forming kit ’ with 12 inches of EPS foam insulation John ...

Air and vapour barriers

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

...WRBs) , tapes and caulking etc, so the cost doesn’t really go up much. All you need to do to improve the air seal is take your time and be a bit more careful, a...

Passive House

Prefab Passive House & LEED ready kit homes - the future of home building?

...WRB membranes (Weather Resistive Barriers) protecting the wall from the elements. Insulation levels are almost twice the standards required under Part 11 of t...

Concept and design

Prefab Passive House & LEED ready kit homes - the future of buying a new home?

...WRB membranes (Weather Resistive Barriers) protecting the wall from the elements. Insulation levels are almost twice the standards required under Part 11 of t...

Air and vapour barriers

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

...WRBs, sometimes weather-resistive barriers, but in practical terms they are more commonly called housewraps and weather barriers. With so many options I plan to...