Our R-38 wall section. Rockwool insulation is placed in the 2x6 cavity, and 3.5 inches of continuous expanded polystyrene insulation is screwed to the outside of the oriented strand board shear wall. A benefit to this exterior insulation is that the thermally conductive bridge of the wood studs is broken by insulation. Even a thin layer of exterior insulation can make a big difference.  Photo 3 of 9 in A Zero-Energy Community: Part 2

A Zero-Energy Community: Part 23/9

Our R-38 wall section. Rockwool insulation is placed in the 2x6 cavity, and 3.5 inches of continuous expanded polystyrene insulation is screwed to the outside of the oriented strand board shear wall. A benefit to this exterior insulation is that the thermally conductive bridge of the wood studs is broken by insulation. Even a thin layer of exterior insulation can make a big difference.

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