Sundvick Residence

Location: Langley, British Columbia
Building Type: Single Family Residential
Project Phase: Under Construction
Certification Type: None
Year of Construction: 2020
Gross Floor Area (m2): 300
PHPP Verification: Download

Project Description

Being built as a retirement house in Fort Langley BC. The building is one level with an inground basement, totalling 300 m2, concrete foundation with wood frame over. It is situated to fit orthogonal to the lot which orients it approximately 35 deg off the north-south axis. Window locations have been chosen with a southerly orientation and large overhangs are provided for shading from summer sun. The northerly wall will have no window penetrations. Wall finishes will be natural wood – shingles and T&G siding. Due to the low slope roof design, roofing will be waterproof membrane – light coloured.

Construction will consist of concrete raft slab (200mm thick), 200mm concrete foundation walls, 2×4 structural/service walls (framed with minimal lumber) and TJI joists for floor (300mm) and roof (400mm). To reduce thermal bridging the overhang (300mm TJI) and rainscreen (2×4) strapping will be suspended from the roof strapping. The exterior wall insulation will be support on plywood shelves (no thru-wall screws) to reduce thermal bridging. Windows and doors will be Cascadia Universal Passive House certified. Heat recovery ventilation will be provided using a Zehnder Q450 with post heat coil. Domestic hot water will be supplied by a Sanden SANCO2 Heat Pump Water Heater. A Mitsubishi heat pump will be installed for additional heat and possible cooling. Appliances will all be Energy Star certified and a heat pump clothes dryer will be utilized.

The insulation system will consist of:
under slab – 200mm EPS
foundation walls – 194mm EPS
frame walls – 150mm Rockwool Curtainrock and R14 Rockwool Batt
roof – 350mm cellulose and R14 Rockwool Batt
The air barrier system will consist of:
under slab – WR Meadows 10mil Perminator
foundation walls – Soprema Colphene
frame walls – Siga Majvest
ceiling – Siga Majrex
roof – Siga Majvest