new build PROJECT OVERVIEW Building type: 281 square metre detached two-storey dwelling Location: West Cork Completion date: March 2016 Budget: Undisclosed Passive house certification: Certified Space heating demand (PHPP)*: 10.4 kWh/m2/yr Heat load (PHPP)*: 9.92 W/m2 Primary energy demand (PHPP)*: 60.1 kWh/m2/yr *The above PHPP calculated values are provisional and based on Cork climate data Energy performance coefficient (EPC): 0.153 Carbon performance coefficient (CPC): 0.156 BER: A1 (23.7 kWh/m2/yr) Airtightness: 0.59 ACH at 50 Pa Thermal bridging: Externally insulated generally, all junctions thermally modelled, all external structural items thermally isolated from thermal envelope ensuring continuity of thermal envelope. All window reveals insulated. Raft foundation eliminates the need for any penetrations in the insulation at ground level, and ensures that thermal continuity is maintained
between the wall and slab insulation. Y-Value based on ACDs and numerical simulations 0.0262 Ground floor: Insulated raft foundation consisting of 200mm Aeroflor EPS300, 250mm concrete, 80mm Kingspan TF70 insulation (containing ventilation ductwork channels), 60mm Sika Viscocrete screed (containing underfloor heating), Bambeau Solid 3SF bamboo flooring. U-value: 0.09 W/m2K WALLS Stone wall: 200mm stone from site externally, over 100mm rendered blockwork, 250mm Warmfill Super Silver bead cavity insulation, 215mm blockwork, 15mm airtight plaster internally. U-value: 0.116 W/m2K ETICS wall: Baumit Nanopor render system externally, over 250mm Kingspan Aerowall, rendered 215mm blockwork, 15mm airtight plaster internally. U-value: 0.121 W/m2K Timber walls: Larch cladding or rendered cement board externally, over 50 x 50mm treated battens and counter-batten, Tyvek UV facade membrane, 60mm wood fibre board, 190x50mm timber stud with full fill Rockwool flexi,18mm OSB3, Pro Clima DA membrane taped and sealed, 50mm service cavity insulated with Kingspan TW50, finished with 15mm Fermacell board internally. U-value: 0.111 W/m2K
over 120mm Xtratherm Thin-R XT insulation, vapour control layer, plywood deck, 300mm timber I-joists laid to falls (200mm air cavity & 100mm Rockwool Flexi), Intello Plus membrane, service void, plasterboard ceiling. U-value: 0.118 W/m2K Windows: OPTIWIN triple-glazed, alu-clad timber windows with argon filling achieving overall U-value of 0.83 W/m2K Heating system: Nilan Geo 6 unit provides primary space heating with a COP of 440%. Air to water heating is provided by the Compact P by Nilan.180L water storage with a 250L buffer tank Ventilation: Nilan Compact P Geo heat recovery ventilation system, Passive House Institute certified to have heat recovery rate of 77% Electricity: Ten panel (16.2m2) solar photovoltaic array – eight at 30°, two on the flat later added to achieve A1 BER target – with average annual output of 2104 kWh/a Lighting: Low energy LED lighting throughout. Generally ERCO LED Wallwasher, ERCO Starpoint downlighter/ spotlight. Exterior lighting integrated with overall lighting design Green materials: Fermacell dry lining board, 27% GGBS in concrete, all timber PEFC/FSC certified, along with FSC-certified bamboo products.
Roof: Soprema Flagon TPO membrane,
ph+ 41