Typar / Guides

...Typar. While its intent is largely as a breathable membrane to protect against water penetration behind cladding, it can be an effective air barrier if installed as such. Water vapor can pass through easily, but air cannot. The problem with it being relied upon as an air barrier is that it is rarely if ever installed...

A technical guide to understanding the role weather 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 cal...