DIY





Framing Double 2-by-4 Walls


| 4/29/2013 2:52:00 PM



Building a net zero energy home, as all my readers know, requires construction of an airtight, super insulated building envelope. Walls are, of course, a key component of the building envelope. I found that the least-expensive option for my house was a fourteen-inch thick double 2 x 4 wall insulated with spray foam and cellulose. This was far cheaper than SIPs and ICFs and resulted in almost no bridging loss.

 subflooring

Once the subflooring was laid, we began to frame the double 2 x 4 walls. The outer 2 x 4 wall was framed first, sheathed with ½-inch OSB, then tilted into place.

 studs with sheathing

Here are two sections of the outer 2 x 4 walls, braced to prevent them from collapsing.



braced stud walls 



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