Issue 12, Vol 5 Out Now
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Featured Article
| International selection |
Innovative low energy construction is rarely recognised on a European
scale. The Isover Energy Efficiency Awards are one exception — here are
nominations from across the continent that were celebrated at the
European awards ceremony in Barcelona on 2 June
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Read More >>
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Latest Blog Comments
Official magazine of Easca  |
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Carrigaline passive house |
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Tuesday, 15 November 2011 |
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Page 4 of 4
"Everyone involved was locally based, and that was really nice,” he adds. “Everyone knew each other and they were all very interested in achieving the passive house standard."
He says the house is proof that a “reasonable standard” low energy design can go passive without major modifications — and without sacrificing good design. “It doesn’t have to look like something designed by a physicist," he says.
Backfilling of earth against the ground floor, which was built with insulated concrete formwork, allows the house to nestle into the ground. The walls here are lined externally with Bituthene 8000 waterproof membrane and Servipak board for protection
Selected project details
Clients: Sally & John O’Leary
Architects: Wain Morehead Architects Ltd
(team: John Morehead, Paul O'Leary, Evan Finnegan)
Contractor: Twomey Construction
Quantity surveyors: Richard Leonard Associates
Civil/structural engineer: Horgan Lynch Consulting Engineers
Services consultants: DW EcoCo
Airtightness tester: Tremora Ltd
Timber frame: Eco Timber Frame
Insulated concrete formwork: Thermohouse
Windows & doors: West Building Products Ltd
Roof lights: Velux
Airtightness products: Ecological Building Systems
Thermal breaks: Isokorb by Schöck
Solar thermal: Kingspan Renewables
Heat recovery ventilation: Ollie McPhillips Ltd
Larch cladding: Unterluggauer , Austria
Lower level cladding: Tegral Natura Pelicolour by Tegral Building Products
Rainwater Harvesting: Ireland Waste Water
Ceramic emitters: Ceramicx Ltd .
Built-in furniture fit out: Classic Kitchens
Project overview:
Building type: 238 square metre detached two-storey house
Location: Carrigaline, Co. Cork
Space heating demand (PHPP): 11kWh/m2/year
Heat load (PHPP): 8W/m2
Ground floor: Raft foundation insulated with 140mm Styrozone insulation and 60mm Kingspan insulation. U-value: 0.115 W/m2K
Ground floor walls: Tegral Natura Pelicolour rainscreen on rendered insulated concrete formwork with 100mm graphite EPS externally, 50mm graphite EPS internally and a 150/200mm concrete core. 100mm service cavity insulated with Rockwool and 15mm Fermacell internally. U-value: 0.12 W/m2K
First floor walls: Timber frame with 22m larch cladding externally, followed inside by 50 x 50mm treated battens and counter-batten, Tyvek UV facade membrane, 22mm woodfibre board, 235 x 38mm cellulose-filled timber stud, 15mm taped and sealed OSB, 50mm service cavity insulated with Rockwool insulation, and 15mm Fermacell board internally. U-value: 0.13 W/m2K
Roof: Tegral fibre cement slates externally on 50x35 battens/counter battens, followed underneath by breathable roofing underlay, 346mm timber I-joists fully filled with cellulose insulation, 15mm taped & sealed OSB, 50 mm uninsulated service cavity, 12.5mm plasterboard ceiling. U-value: 0.11 W/m2K
Windows: Katzbeck triple-glazed aluminium-clad larch windows, with an overall U-value of 0.82 W/m2K and a g-value of 0.55. Velux roof lights – with a frame U-value of 1.5 W/m2K, a glass U-value of 0.5 W/m2K and a g-value of 0.46 – were also installed
Heating system: Patented electrically-powered infra-red local ceramic heaters, plus three square metres Kingspan Thermomax solar thermal evacuated tubes. Back-up gas boiler for towel rails in bathroom and radiator in laundry room drying tower
Ventilation: Paul Santos 370DC heat recovery ventilation system — Passive House Institute certified to have heat recovery rate of 84% / EN 308 certified efficiency of 92.7%
Airtightness: 0.6 air changes per hour at 50 pascals pressure
Furniture fit-out: Most of the built-in furniture came from Noblessa, a German fitted furniture manufacturer. All timber used by Noblessa comes from PEFC certified sources
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Lenny Antonelli |
| About the author: |
| Lenny Antonelli is a journalist for Construct Ireland. He has written for the Sunday Tribune, Science Spin, Sustainability and Organic Matters amongst other publications.
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