Updating house insulation

In North America, XPS is made with ozone-depleting HCFC-142b.XPS has higher density and R-value and lower vapor permeability than EPS rigid insulation.The main disadvantage of this approach is that the felt is not an effective air barrier.

There are several possible ways to insulate this type of wall.

Once these sticks are in place, rectangles of rigid foam can be inserted (cut-and-cobble style) in each stud bay, up against the sticks (see Image #3, below).



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