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Construction system
Frame Ultra

Component id: 1184cs03
Manufacturer: Frame Homes UK
Category: Construction 
Construction type: Light (Wood) 
Window: The PHI example window spruce/fir-integral frame (0,11 W/(mK)) with 48 mm glazing and phA-class spacer was taken into account. The threshold is from fibre glass and timber, no aluminum is used. The window represents a very good standard and leads to low thermal bridges and high inner surface temperatures. 
Airtightness: The air tightness is provided by 18mm OSB board fixed to the central wall stud. OSB sheets are taped together using air tightness tape. An internal ledger plate is used at intermediate floors allow a continuous air tightness line. Where insulation is installed on top of the ceiling, An air tightness membrane is stapled (staples are over taped) to the bottom of the roof truss. 
Illustration: The Passive House Institute has defined international component criteria for seven climate zones based on hygiene-, comfort- and affordability criteria. In principle, components which have been certified for climate zones with higher requirements may also be used in climates with less stringent requirements. This use might make sense in certain circunstances. 
Climate zones: Cool, temperate
Remark: The system consists of a closed panel timber frame. The wall construction includes a central solid vertical timber stud and mineral wool insulation. The thermal performance is improved with additional mineral wool insulation layers on both sides of this main stud wall. A thermally broken sole plate is provided at the base of each wall panel along with a thermally broken headbinder at the top of each panel. Two roof options are available: A pitched roof truss with mineral wool insulation laid on top of a flat ceiling. A pitched roof with mineral wool insulation installed between rafters and in an internal service void.

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