Weather resistive barrier / Guides

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

Choosing the right house wrap / weather barrier, which is best? barriers and rainscreens play in a wall, choosing the right products and installation tips for optimum performance. They're officially known as water-resistive barriers or WRBs, sometimes weather-resistive barriers, but in practical terms they are more commonly called housewraps and weather barriers. With so ...

Choosing between OSB or Plywood for house sheathing for Roofs, Walls & Floors.
Wood and organic materials

Which is better, OSB or Plywood for Roofs, Walls & Floors? resistive barrier (WRB) you install next, and those range from about 5 or 6 perms to up around 60 perms. Here is an example of that, assuming the 2 perm rating: 2 perm 7/16 OSB sheathing with a 30 perm WRB results in 1.88 perms 2 perm 7/16 OSB sheathing with a 5 perm WRB results in 1.43 perms That m...