new build
PROJECT OVERVIEW Building type: 113 square metre detached two-storey split level timber frame house. Location: IndreabhĂĄn, County Galway Completion date: January 2015 Budget: â‚Ź250,000 Passive house certification: Not certified Space heating demand (PHPP): 15 kWh/m2/yr Heat load (PHPP): 14 W/m2 Primary energy demand (PHPP): Not calculated Airtightness: 0.50 ACH at 50 Pa and 0.50m3/m2/hr at 50 Pa Provisional BER: A2 (awaiting final figures) Thermal bridging: Rising foundation walls in Quinn Lite block at insulation line. Timber frame wall internal insulation overhanging slab with edge insulation 70mm thick. Internal load bearing walls bearing on concrete slab on insulation without rising wall. Steel in timber frame minimised with limited steel bearing to foundation and then cold bridging
minimised with steel lined with 130mm insulation internally in combination with thermal isolation plates at floor level. 0.08 Y-value utilised default Irish ACDs with no secondary calculations. Lower ground floor: Rising walls with 150mm wide 430mm deep Quinnlite B3 block to floor level. 100mm concrete slab on separation layer, on 200mm Kingspan K3 insulation, with 70mm K3 insulation upstand to edges. U-value: 0.10 W/m2K Upper ground floor: Suspended timber floor. 18mm OSB flooring on 50mmx50mm battens at 400 crs, on airtightness membrane, on 225x44 Joists at 400 crs with 220mm Knauf wool batt insulation between and 80mm PIR insulation to underside. U-value: 0.12 W/m2K Walls: Corrugated metal cladding on 35x50 battens, on Ampatop F2 building wrap, on 60mm Quinn Therm PIR insulation, on 225x44 timber frame with 220mm Knauf Wool insulation infill. Ampatex DB2 airtightness membrane and 50x50 battens at 600crs forming services zone filled with Isover Metac batt insulation and 82.5mm PIR insulation backed plasterboard. U-value: 0.12 W/m2K Roof: corrugated metal roofing on 35x50 battens at 440 crs, on 18mm wpb ply counter battens at 600 crs (bent to curve), on Ampatop breather membrane, on 2 layers 9mm OSB board, on 225x44
rafters at 400 mm crs (approx) with Ampatex DB2 airtightness membrane to underside and voids filled with pumped cellulose insulation. 50mm battens to underside of rafters forming services zone filled with 50mm Isover Metac batt Insulation with 18mm ply counter battens forming curve and 9mm OSB ceiling lining (with flame retardant treatment). U-value: 0.13 W/m2K Windows: Nordan N tech Aluclad thermally broken timber windows. Triple-glazed with low e argon-filled triple-glazing, 0.51 g factor generally, with an averaged overall U-value of 0.83 W/m2K Heating system and ventilation: Nilan Compact P combined heat pump, hot water storage and mechanical heat recovery ventilation. Passive House Institute certified to have ventilation heat recovery rate of 77%. Boost space heating with 1.5KW in-line electric fan heater on living room air supply ducting. 180 litre integrated hot water storage tank. Stove: Termatech TT20 wood burning stove with ducted in air supply in living area certified 83.4% efficient to EN13240. Electricity: 5 Gintech solar PV panels, each with max output of 250 Watts each. Green materials: Timber framed construction, cellulose insulation to roof, GGBS in foundations.
ph+ 61