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0:00/5:16
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D-I-V-O-R-C-E 2:320:00/2:32
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I'm a Workin' Man 3:560:00/3:56
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Get Out of Town 6:300:00/6:30
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0:00/3:20
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0:00/3:08
Superinsulating the House
The foundation was insulated with 4" of XPS (extruded polystyrene.) Expanded polystyrene (EXP) was not used because it absorbs water, which is problematic in an exterior environment.
The top edge of the polystyrene was beveled away from the house to shed water. Metal lathe was bent to shape and nailed to the sill plate and spiked to the insulation.
The foundation walls were dry-stacked concrete block with a fiberglass/cement parge coat. The blocks were then filled with grout.
Placing the insulation on the exterior of the walls brings the mass of the walls inside the thermal envelope. Exterior insulation also helps prevents condensation inside the house, which could lead to mold problems.