new build
“I quite like the geometry side of oak, and it looks pretty amazing, it looks beautiful.”
PROJECT OVERVIEW Building type: 160 square metre detached two-storey oak frame house Location: Naas, Co Kildare Completion date: March 2016 Budget: Not disclosed Passive house certification: Pending Space heating demand (PHPP): 17 kWh/m2/yr Heat load (PHPP): 10 W/m2 Primary energy demand (PHPP): 118 kWh/m2/yr Airtightness: 0.4ACH at 50 Pa Energy performance coefficient (EPC): 0.272 Carbon performance coefficient (CPC): 0.283 BER: A2 (45.29 kWh/m2/yr) Thermal bridging: SIP wall panels on concrete floor slab — 150mm XPS continuous insulation with SIP roof panels. Concrete floor slab on insulated foundation system (300mm of EPS) (Kore Passive Slab). 80mm of upstand of Kore Passive Slab in floor in full contact with 80mm of Gutex on outer stud wall of SIPs in full contact with 35mm of Gutex on roof; full wrap of
insulation all around the house. Windows thermally broken. Ground floor: Raft foundation insulated with 300mm EPS. U-value: 0.10W/m2K. Walls: Oak-framed walls, 22m Cedarwood cladding externally, followed inside by 50 x 25mm treated battens on 80mm Gutex woodfibre board, 100 x 44mm stud filled with 100mm of Isover Metac mineral wool, 15mm taped and sealed OSB SIP insulated with 150mm XPS insulation, and pro clima airtight DM membrane internally with 50 x 25mmm battens for an uninsulated service cavity and 15mm Gyproc Rigidur board internally. U-value: 0.12 W/m2K. Roof: Oak framed roof, Euroclad Vieo Edge metal sheeting on breathable roofing underlay externally, on 18mm OSB, on 50mm x 25mm treated battens, on 35mm Gutex on SIP Panels (15mm OSB, 150mm XPS, 15mm OSB) and pro clima DM airtight barrier internally with 50 x 50 battens to form a service cavity insulated with 50mm Metac. U-value: 0.14 W/m2K. Windows: Munster Joinery Passiv triple-glazed timber aluclad windows, Passive House Institute certified. Overall U-value of 0.82 W/m2K. Heating system: 4.5 Kw Daikin Altherma air-to-water heat pump (SPF: 389% for space heating, in accordance with IS EN 14825) supplying 2 rads downstairs, 3 rads upstairs, hot water and towel rads. Ventilation: Zehnder 350 ComfoAir heat recovery ventilation system — Passive House Institute certified to have heat recovery rate of 83%. Electricity: 2 panel SolarWorld PV system to be installed.
ph+ 49