Air-Sealing and Insulating, Images 20-27

Leaving little to chance, the crew caulked all seams between framing members and subfloor.

Foam backer rod, sealed with caulk, was used in lieu of expanding foam around window and door jambs.

Window sealing was time-consuming, with caulk outlining the metal installation straps and the interior edges of the self-adhering window flashing.

Dense-pack cellulose insulation was blown behind a permeable membrane stapled to the studs.

Attic ceiling areas were sheetrocked first to support the insulation. Attics received a 16-inch layer of loose-fill cellulose with an R-value of 65.

Drywall clips replace lumber backers in wall and ceiling corners.

A 7-kW PV array on the shed-dormer roof is projected to supply more than 100 percent of the home's electrical consumption.

A digital electric meter displays a constant readout of power delivered to and from the grid.

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