Understanding Air And Vapor Barriers (VIDEO)
On this episode of the Build Show, Matt Risinger explains the building science behind air and vapor barriers. Things get a little complicated and, as Matt puts it, “geeky”, so put on your thinking caps and strap in.
Matt Risinger is a builder in Austin, TX whose goal is to educate people on the principles of Building Science in a practical way. Matt builds homes that are dramatically more energy efficient, durable, healthy, and comfortable than most new homes in America. He has a BS in Industrial Management and has worked in construction across the United States. Since 2005 Matt has owned and operated his own company “Risinger & Co.”, which has grown to 27 people. He loves quality craftsmanship and is proud to show off his crew’s efforts on his YouTube channel.
Thanks for sharing your terrific insight and awesome videos Matt.
Insulation tip: Spray the rim and the bottom plate
There should be a foam sill sealer between the bottom plate and the concrete foundation wall. But voids in the wood or concrete, or tears in the sill sealer, can create gaps where air and insects can penetrate. While you’re sealing the rim board, cover the bottom plate and top off the concrete as well. There’s no need to picture-frame the joist spaces before filling them, but don’t spray a lift more than 2 in. thick. Click here for more spray foam tips.