taping as a learning experience, but it was laborious.
SELECTED PROJECT DETAILS Client & main contractor: Graham & Emily Bizley
He adds: “I wouldn’t like to guess how many pieces of tape there are in this house —10,000 or something! And it was just an incredibly onerous process. I’m interested in finding a more monolithic form of construction.”
Architect: Prewett Bizley Architects Structural engineer: Structural Solutions Passive house certification: Warm Ecologist: Gould Ecology Timber frame: Allwood Timber Construction Roof & wall insulation: Warmcel
No monitoring has been carried out so far but space heating from the wood burner in the snug costs between £200-£250 and electricity is £800 per year (which also takes into account their home office). Their house has that rare quality of looking and feeling together. It was also shortlisted for last year’s UK Passivhaus Awards.
Roof & wall insulation installer: Tinhay Airtightness tapes: Pro clima and Siga Internal linings: Fermacell Ground floor insulation: Pavatex Internal insulation: Black Mountain Natural insulation Windows & doors: JPW Construction Folding sliding doors: Solarlux Folding sliding door installer: Interlux
As Graham points out: “It’s a piece of architecture that just happens to be a passive house. Architecture doesn’t have to be sacrificed to achieve excellent energy performance.”
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storage tank: Marsh Industries Ltd
(top) the house was built into the hillside with a retaining wall to keep to the height of the original bungalow, so the dwelling is single storey on one side and two storeys on the other; (above) the house is twin timber frame construction, the inner frame bears the load and the outer frame provides thermal separation. Warmcel insulation was then blown into the timber frame cavity; (right) the exterior is clad in green oak and there’s an outrigger structure of green oak posts, with this outer structure providing solar shading to the windows