The difference between air barriers and vapour barriers / Green Building & Sustainable Home Renovation Information & Advice

...andard code compliant paper-faced drywall which can start to develop mold at about 80% RH. As we insulate and make homes airtight, they don't dry as easily, and common building practices trap moisture inside wall assemblies. Be careful not to confuse Air barriers with vapor barriers either, they're not the same... Addi...

...anding 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 called housewraps and weather barr...