Net Zero SIP House Port Hadlock WA

Location: Port Hadlock-Irondale, WA

Project Information

Project Type:	Residential, < 3,000 sq. ft.
Manufacturer:	Premier Building Systems
Builder:	Clifton View Homes. / Zero-Energy Plans LLC
Design Professional:	Zero-Energy Plans LLC
Year Built:	2015

Performance

High Performance:	Yes
HERS/EUI Index Score:	-9
ACH50 - Blower Test Results:	1.7
kBtu/sq.ft./year:
CO2 lbs./sq.ft./year:

Awards/Certifications: DOE Zero Energy Ready Home, ENERGY STAR Certified, EPA Indoor AirPLUS

Home builders had a beautiful piece of property overlooking a marina on Puget Sound, west of Seattle. An architect had already drawn up plans with most of the window area facing north for the view. Clifton was hired as the builder.

The home builders did not come asking for a zero energy home, but the husband, wanted SIP construction that Clifton uses. "Once I told them that we could do zero energy construction in their price range, they knew that is what they wanted," said Clifton.

The SIP construction provided an airtight structure for the home, which tested at 1.7ACH50. As well as helped the homeowner with projected energy cost savings (annual savings of $1,553) - 6.5" SIP walls provide an R-25 insulation value with no thermal bridging. The walls are rapped in corrugated house wrap to provide a slight air gap and drainage plane behind the fiber cement siding.

6.5" SIP walls provide an R-25 insulation value with no thermal bridging. The walls are rapped in corrugated house wrap to provide a slight air gap and drainage plane behind the fiber cement siding.
Roof is 10.25" SIPS (R-40); all cathedral ceilings, except small mechanical attic above the master closet and master bath, and another small attic over the guest bath, all within the building envelope. Standing-seam steel roofing. Garage is framed with raised-heel trusses and R-38 ceiling insulation.
Builder installed a dense slip sheet under the flooring so it became part of the thermal mass of the concrete floors, which also has 4 inches (R-20) of rigid foam underneath floor slab.
11.75" Insulated concrete form (ICF), concrete-filled foam block walls formed the foundation walls down to the footer which is 12" below slab base, providing R-23 of insulation and a thermal break around the slab, which held the radiant floor heating coils.

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