How do I air seal a wall cavity?
I am looking for a cost effective DIY way to air seal the inside of a wall cavity during new construction. I am sure this has been written up someplace on this site, but I cannot find it.
Asked by Eric Heerdt
Posted Thu, 02/21/2013 - 13:50
Edited Sun, 03/03/2013 - 07:52
Posted Thu, 02/21/2013 - 13:50
Edited Sun, 03/03/2013 - 07:52
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Caulking the studs to the sheathing from the interior side with acoustic sealing is pretty straightforward stuff (but buy a powered caulking gun, eh?)
An air-tight drywall primer lives here:
http://www.buildingscience.com/documents/information-sheets/air-barriers...
Note, the harder part to seal well at the gypsum layer is the electrical boxes, but there are purpose-made flanged boxes available designed to be foam-sealed, eg:
http://airfoilinc.com/demo/demo.html
Using fire-block foam or caulk to seal the electrical penetrations of wiring runs through studs and stud plates is also a high-value/low-cost air sealing enhancement.
Posted Thu, 02/21/2013 - 15:55
Eric,
The two most common techniques used there days are the sealed sheathing method and the Airtight Drywall Approach.
Here's an article on sealed sheathing: Airtight Wall and Roof Sheathing.
Here's an article on the Airtight Drywall Approach: Airtight Drywall.
Posted Fri, 02/22/2013 - 09:15