Page 32 - Green Builder Sept-Oct 2020 Issue
P. 32
DOE Annual Building Science Roundup A BETTER WAY
LIVING
GARAGE
DINING
KITCHEN
Inside views. Energy- MASTER
saving internal elements BEDROOM MASTER
include solar-powered LED BATH
lighting, heat-absorbing
flooring, and heavily
insulated walls and ceilings. MANTELL-HECATHORN BUILDERS
CREDIT: CHRISTOPHER MARONA PHOTOGRAPHY Glacier Club Modern Home, Open wide. Carefully placed windows and lights brighten
up the interior while also conserving energy.and lights
brighten up the interior while also conserving energy.
HEADED IN THE RIGHT DIRECTION a roof that is broken into multiple slanted,
On this home, builders took full advantage curved, and flat planes on this modern
of the exceptional southern exposure of the home. The roof structure consists of
site for optimal solar collection and passive -inch I joists with no attic space. All of
solar heating potential. They installed a .- the upper level consists of cathedral ceilings
kW array of solar panels on the standing that are insulated with inches of closed-
seam metal roof and large amounts of cell foam against the underside of the
glazing on the south-facing side of the home. OSB roof sheathing plus R- of berglass
All windows are triple-paned, with an batt. The sheathing is completely covered
insulation value of U-. (R-.). The with an adhered ice and water barrier
windows have two low-emissivity coatings underlayment.
to help minimize radiative heat transfer The walls consist of -by- at -inch
through the glass. The windows are not on-center stud-framed walls that are lled
gas filled due to the high altitude. All with . inches of closed-cell spray foam,
confidence to the homeowner that the windows have aluminum-clad wood frames which provides insulation, air sealing, and
home will deliver what Mantell-Hecathorn and most are xed rather than openable, some structural rigidity to the walls. The
promises. which provides unobstructed views, better remainder of the wall cavity is lled with
Greg Mantell-Hecathorn stresses the value resistance to wind pressures, and more air inches of loose- ll berglass. The walls
of the third-party veri cation required by the tightness. The windows have a high solar are sheathed with a coated OSB product,
DOE program. It makes it known “that we heat gain coecient (SHGC) of . to allow then topped with inches of rigid foam. A
are providing our clients and the community in bene cial solar heat gain in the winter. rainscreen was installed behind the stucco
with homes that provide long-lasting value, Motorized blinds installed on the interior and stone cladding, and ⁄-inch furring
greater comfort and performance, and which side of the windows can be scheduled to strips were installed behind wall sections
are tested to meet those high standards for operate automatically to keep out unwanted with lapped siding. The walls have a total
superior quality and energy eciency,” he summer solar sun. Deep overhangs and insulation value of R-¡.
says. “We believe that the DOE Zero Energy covered balconies also minimize heat In addition to the spray foam layer in
Ready program provides the best veri able gain from high overhead summer sun. the wall, cavities and the underside of the
platform for high performance standards, Lighting controls are integrated with the roof deck, sections of the oor that were
while allowing the exibility to be adapted home automation and energy management cantilevered were also insulated from
to the wide variety of custom homes that system. underneath with spray foam. All wood-to-
we build.” The standing seam roof cladding covers wood seams were sealed with caulk and tape
30 GREEN BUILDER September/October 2020 www.greenbuildermedia.com
26-44 GB 0920 Building Science.indd 30 10/13/20 11:59 AM
