20
110
367 172
SIP vapour barrier
15mm brick slip system
2x12.5mm plasterboard 110mm Kingspan K5 Insulation ceramic tiles
breather membrane
screed with underfloor heating
12.5mm Magnesium Oxide board
22
DPM
75
DPM
waterproof render
300
150mm insulation
907
lightweight blockwork
350
concrete slab
160
test, it achieved 0.43 (or 0.49 air changes per hour, better than the passive house standard of 0.6). The architects also designed the house to run at a slightly hotter temperature than normal. Rather than the normal 21C, they aimed for 23C because Elizabeth wanted a particularly warm home. At times over the scorching summer of 2018, the monitored temperature inside went up above 25C. On 22 and 23 July, it reached 27C in the house when the outside temperature was 35C, and 33C respectively. However, this was during a period when Elizabeth was away, the ventilation system was turned off, and windows were left closed. “It’s slightly above the curve for London temperature data for PHPP, but it’s still okay. Elizabeth likes to keep all the windows open in summer and she can do night-time cooling,” says Dudzicki. Elizabeth also wanted underfloor heating, fearing the house might not be warm enough in winter. She needn’t have worried. “They told me I would need no more than two radiators and I said, ‘you don’t know me, I really feel the cold’. I’ve not used it much but when there was snow and minus temperatures it was lovely to walk around barefoot on the warm ceramic and vinyl tiles,” she says. “It’s another of the many features I love about the house.”
clay heave board
0
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RDA Architects 16 Forest Hill Road, London SE22 0RR +44 (0)20 8299 2222 info@rdauk.com
Architecture | Interiors | Consultancy
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www.rdauk.com
CONSTRUCTION IN PROGRESS
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1 The mews lane, which has another certified passive house by RDA Architects a few doors down the street; 2 construction work begins on the foundations which took around three months to complete; 3 the house itself then went up in three weeks using Kingspan TEK structural insulated panels; 4 110mm Kingspan K5 Kooltherm external phenolic insulation board was fitted externally to the panels to further boost the U-value of the walls; 5 the house nearing completion; 6 adhesive applied to the insulation boards for adhering the 15mm brick slips to the wall.
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