High Performance SIP Multifamily DIV II Sonora CA

Location: Sonora, CA

Project Information

Project Type: Residential, Multifamily
Manufacturer: Premier Building Systems
Builder: Delillo Contracting
Design Professional: Zero-Energy Plans LLC
Year Built: 2020

Performance

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

Speed of construction & high performance requirements, zero-energy mandate, wildlands-urban interface code. SIPS provide superior insulation and air-sealing, while eliminating the need to vent the attic, which is a big deal when it comes to the Wildlands-Urban Interface Code. Construction time was also a factor, as site labor is increasingly in short supply.

SIPs provide superior insulation and air-sealing, while eliminating the need to vent the attic, which is a big deal when it comes to the Wildlands-Urban Interface Code. Construction time was also a factor, as site labor is increasingly in short supply

The SIPs -over-Truss construction allows longer spans, while keeping some attic space for duct-work and fire suppression systems. The use of R-15 batts in the top chord of the truss beneath the R-28 SIPS panel gives us a well air-sealed R-43 assembly, with no thermal bridging. Gable end walls go all the way to the bottom of the SIPS panel, which provides all the overhangs, without requiring additional framing.

The 6" GPS roof panels were set on standard trusses. There is no overhang on the trusses and no bird-blocking...only solid blocking between trusses in accordance to the Wildlands - Urban Interface Code. The bottom chord f the trusses provides a fully enclosed attic completely inside the SIPS building envelope, with only the ends of the trusses needing to be spray-foamed.

The required sprinkler system is free to run along the bottom chord of the trusses. The combination of Hardi-Siding, and Hardi-Soffit along with all the tempered glass in the windows and the steel roofing provide a fireproof exterior shell. This is something to be touted widely.

Documents

Affiliated Members

Zero-Energy Plans, LLC
Design Professional
Coupeville, WA

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