Tay Valley House

Location: Perth, Ontario
Building Type: Single Family Residential
Project Phase: Complete
Certification Type: Targeting Certification
Year of Construction: 2019
Gross Floor Area (m2): 181 m2 (Treated Floor Area - TFA)
PHPP Verification: Download
Certified Passive House

PHI Low-Energy Building


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Project Description

A young family bought a wooded rural lot with the dream of building their “forever home”: a house with a minimal environmental impact that can meet their evolving needs. Living spaces are designed for entertaining and family gatherings, with large south-facing windows and easy access to a generous screened porch. Cellulose and wood-fibre boards were used for above-grade insulation due to their low embodied carbon.

Typical exterior wall assembly (U-value = 0.091 W/m2K, R62):
– 2×6 structural/service cavity wall with dense-pack cellulose
– Plywood with taped joints (air barrier)
– 11-7/8″ TJIs with dense-pack cellulose
– MSL ECO4 wood fibre insulation board (vapour diffusion open)
– WRB
– Rainscreen cladding

Slab on grade, Legalett engineered raft slab system (U-value = 0.115 W/m2K, R49)
– 8″ reinforced concrete slab
– 12″ Type II EPS insulation

Roof:
– Raised heel scissor trusses with loose-fill cellulose 24″ to 36″ thick (thickness varies due to scissor truss geometry) and a vented attic
– Plywood air barrier attached to the underside of trusses with taped joints
– Double furring for service cavity
– Drywall finish