First certified Passivhaus in Cumbria
Stoneworks Garth is a compact detached 4 bedroom Passivhaus of timber frame construction. It is designed to reflect local Cumbrian farmhouse style but has a contemporary feel. To the south, large floor to ceiling windows catch the sun, with shading provided by a brise soleil.
On the roof, 4kw of solar PV panels provide electricity. Space heating and hot water is provided by an air source heat pump connected to several radiators with a small wood-burning stove for further heating options.
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Stoneworks Garth, south elevation. Image credit - Eco Arc Architects
The house was awarded certification in August 2015, and is constructed from a pre-insulated timber frame build method, employed by Eco Arc Architects, Alan Clarke, Eden Insulation and Ecological Building Systems.
An interview with the new owners can be viewed below.
Materials
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Wall |
Plasterboard, Vapour block lining board, 300mm Warmcell 500, 40mm Gutex multitherm cavity and rendered blockwork. U-value = 0.103 W/m2K |
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Roof |
Plaster board, ceiling substrate board, 600mm Warmcell 300 to bob tail truss rafter roof with slate covering. U-value = 0.067 W/m2K |
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Floor |
Engineered oak, reinforced concrete, 300mm Isoquick insulated raft on stone piles. U-value = 0.143 W/m2K |
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Windows & doors |
Timber/aluminium. U-value = 0.69 W/m2K. G-value = 0.53 |
Predicted performance
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Thermal energy demand |
12 kWh/m2.yr |
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Thermal energy load |
8 W/m2 |
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Primary energy demand |
101 kWh/m2.yr |
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Airtightness, n50 |
0.3 ach@50 pascals |
Key team
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Client |
Cheryl Hitchcock & Dudley Thompson |
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Architect |
Andrew Yeats, Eco Arc Architects |
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Consultants |
Alan Clarke (M&E) |
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Contractor |
Alan Brockbank, B&H Construction |
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Structural engineer |
Tweddell and Slater (below ground) |
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Certifier |
16th September 2015
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