Page 44 - Green Builder Sept-Oct 2020 Issue

DOE Annual Building Science Roundup A BETTER WAY

Efficiency experts. Double-hung exterior
windows and transom windows, LED lights,
small-diameter air ducts and energy-saving
appliances help make this home ultra-green.
CREDIT: COURTESY OF CHARIS HOMES

drywall-to-top plate seams and joints were .-inch aluminum drip edge was installed
sealed with three inches of closed-cell spray before laying the synthetic water-resistant
foam. Crews carefully sealed around wiring, underlayment, which was topped with Š-year
lighting xtures, and bath exhaust fan ducts architectural shingles. So‹t vents and a Œ-inch
before installing inches of R- blown continuous ridge vent ventilate the attic.
cellulose. For the garage attic, R- blown A gas tankless boiler with an Annual
cellulose was installed. Fuel Utilization E‹ciency (AFUE) rating of
The hip-designed truss roof was sheathed “ provides domestic hot water and space
with ⁄­€-inch Oriented Strand Board (OSB) heating. The space heating is provided via
that was fastened with steel plywood clips. radiant ”oor loops beneath the sub”oor in
A -millimeter-thick ice-and-water shield the basement and via a coil in the central air
was installed at all valleys and from the handler for the rest of the home. The specially
eaves up Š inches past the wall line, then designed indoor fan-coil unit is matched to

42 GREEN BUILDER September/October 2020 www.greenbuildermedia.com

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