case study The back of the house is New England style
House size before: 130sqm House size after: 225sqm Plot size: 340sqm Total cost including build, furniture and fees: €400,000
Build spec
Construction: airtight and cold-bridge free products used. All walls (single storey extension and two storey side and front extensions): 300mm cavity wall with inner services duct, drylined, external face covered in rain screen boarding, PIR insulation, U-value 0.17W/ sqmK. Flat warm roof construction, composite urethane insulation board with a bitumen impregnated fibreboard facing, U-value 0.16W/
sqmK. Ground floor concrete, PUR insulation, U-value 0.14W/sqmK. Reformed pitched roof to existing house and side / front two storey extension: cold roof construction, PIR between roof timbers and under including airtight membrane, 0.16W/sqmK. Windows: mixture of double and triple glazed, timber frames supplied with internal paint finish, U-value of units 1.2 W/sqmK. Two 7.8m x 1.2m roof lights (‘troughs’) in flat roof extension: triple glazed and installed in three sections, aluminium frame, U-value 1.1 W/sqmK Airtightness: 4.8MN/(h.MO)@50Pa. Astrid Madsen
info The companies listed below provide products & services relating to this article. Project design and supervision ARC Design, Chartered Architectural Technologists Brian & Mark Davies MCIAT, Delgany, Co Wicklow, tel. 01 201 0377, www.arcdesign.ie Structural engineer Rene McNally Associates Ltd, Blackrock, Co Dublin, tel. 01 2894444 Quantity surveyor Brian Gubbins Quantity Surveyor, Greystones, Co Wicklow, mobile 086 320 4486 Electrical Contractors Kenmac Electrical Limited, Bray, Co Wicklow, tel. 01 2762161 Plumbing & heating contractors Eco Scene Limited, Roundwood, Co Wicklow, tel. 01 902 3793, www.ecoscene.ie Energy consultants Evolved Energy Solutions, Dublin 2, tel. 01 860 3710, www.evolvedenergy.ie Kitchen supplier Newcastle Design, Rathnew, Co Wicklow, tel. 0404 65000, www.newcastledesign.ie
Interior designer Garry Cohn, Dublin 2, tel. 01 430 9555, www.cohnrhattigan.com Wood work Kevin Kelly, Elite Interiors, Athgarvan, Newbridge, Co Kildare, mobile 087 834 5566 Bathrooms Tuscan stone and bathrooms, Dun Laoghaire, tel. 01 289 8822, www.tuscanstonebathrooms.com Flooring Floor Design, Dublin 10, tel. 01 623 4157, www.floordesign.ie Kitchen Newcastle Design, Rathnew, Co Wicklow, tel. 0404 65000, www.newcastledesign.ie Windows Rooflights fitted win Reynaers aluminium section framing and supplied by the Folding Door Company of Ireland, www.foldingslidingdoors.ie Rest of the windows supplied by Nordan, www.nordan.ie
Wall cladding Tegral Cedral shiplap weatherboard, www.tegral.ie Roof insulation Flat roof: Moy Materials’ Polycomp, Paralon and Paratorch, www.moymaterials.com Pitched roof: Kingspan K7, www.kingspaninsulation.ie Under building drainage Duker spun cast iron with special collars, www.dueker-germany.com Airtightness system DAFA Di Foil permeable vapour barrier incorporated at attic level, and DAFA Airstop System incorporated elsewhere, www.dafa-as.com Photography Verona McQuaid www.veronaphotography.com
ROI calling NI: prefix with 048 NI calling ROI: prefix with 00353(0)
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