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Modern Issaquah Neighborhood, WA
Award winner
GRAMADU
Washington
Project Type Residential | Single Family > 3000 sf
Year Completed 2023
Project Size 996 sq ft
SIPS Used 6" EPS Walls & 10" EPS Roof
Sustainable Features Premier SIPS, all or no VOC paint, polished concrete floor and low voc wood floors upstairs
Environmental Certifications Net Zero/Zero Energy Ready
Awards 2024 BEA Winner High Performance Homes Under 3K SF
Architect Velocipede Architects
Contractor Dan Allison / Abode Builders
Project Overview
GRAMADU
End Use: Replacing an existing 100 year old DADU with a super efficient DADU and a versatile outbuilding.
Why SIPs: As the owner/builder of 3 other SIP buildings I won't build with anything else!
Benefit of SIPs: Ease of construction is great but it's all about low energy use.
Innovative Design Elements: Exterior 2" cork insulation increases r value and eliminates siding cost and is 100% natural!
HERS Index: -2
Blower Door Test: 1.07
HVAC: Sanden CO2 radiant floor heat/hot water. Fantech ERV
Energy-Saving or Energy-Efficient Design Features:
- Cork 2" exterior insulation
- Triple pane U-15 windows
- Sanden CO2 hot water heater
- Radiant floor heat
- Energy star washer, dishwasher, dryer and induction range.
Solar Panels: A total array of 16KW is installed on the adjacent building
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