Retrofitting Exterior Insulation - Images 1-7

After stripping the existing roofing, the crew installed two staggered layers of 3-inch-thick rigid foam.

The foam is secured with 10-inch HeadLok screws.

The screws are driven through the sheathing into the rafters.

The replacement windows were sized to fit the original double-hung window jambs, which were retained and flashed with a peel-and-stick membrane.

The interior sills and casing were also preserved.

One-by-three strapping screwed to the framing on 16-inch centers holds the double foam layer securely in place and provides a drying and drainage channel behind the siding. Seams on both layers were taped to block air movement.

Metal screen (seen hanging) keeps insects out of the drainage space.

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