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Wednesday, 01 February 2012 |
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Page 4 of 10
Selected project details
Client: Steve O’Leary
Energy consultant: Integrated Energy
Roofing contractor/carpentry: Andrew Griffin
External insulation system: Powerwall
External insulation applicatoe: Paul Cahalan Plastering
Thermal blocks: Quinn Lite
Cavity insulation: Eurobead
Natural insulation: Gutex
Airtightness tapes: Ecological Building Systems /Isover /Siga
Roof lights: Unilux
Windows: Velux
Heat recovery ventilation: Itho
Ssolar: Ecologics
Project overview:
Building type
: 238 square metre detached two storey timber frame house. Extension of
small bungalow to 400m2 detached block built two storey house
Location: Birr, Co Offaly
Completion date: September 2011
Budget: pending
Space heating demand (PHPP): 23kWh/m2/yr
Heat load (PHPP): 14 W/m2
BER: pending
Airtightness: approximately 1.5 air changes per hour when tested two months ago, next test expected to get below 1 air change per hour
Ground floor: 300mm EPS strip foundation with aerated Quinn Lite
concrete blocks on inner leaf up to one block over ground floor and cut
for angled window reveals.
Extension walls: 225mm block cavity wall pumped with EPS platinum
beads and robust Vartry Engineering stainless steel wall ties on
extension. 0.16 U value W/m2K
Original house walls: pumped 90mm cavity wall bonded bead insulation and externally insulated with 150mm EPS.
U-value: 0.14 W/m2K
Roof: Nova black Brazilian slates externally on 50x35
battens/counter battens, followed underneath by breathable roofing
underlay, 60mm Gutex soft board, 9 inch joists fully filled with
cellulose insulation, 15mm taped & sealed OSB, 100 mm insulated
service cavity where space allowed, 12.5mm plasterboard ceiling.
U-value: 0.14 W/m2k
Windows: triple-glazed Unilux alu-clad pine with argon filling and
PIR thermal break built in to frame. Windows fitted flush with exterior
wall on old part of house so EWI forms new reveal to minimise cold
bridging.
Overall U-value: 0.78 W/m2K
Heating system: original 75% efficient grant oil boiler, did not
upgrade as heating load was so low. Clearview Pioneer 400 stove 5kw
with back boiler. Zoned radiators with full thermostatic control. 300L
hot water tank and 60 evacuated tube solar array
Ventilation: Itho HRU 4 heat recovery ventilation system
Green materials: cellulose insulation, Gutex soft board
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