Summary: and cut the interior front wall panel 22 x 14 1 2 and screw it into position Select the 2 x 4 and cut it to 11 1 2 for the Spacer for the top of the Divider Wall Step 6 Apply the Wall Insulation and Exterior Siding Fill all the open wall cavities with 1 1 2 Styrofoam insulation Double the thickness to 3 Select the
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