Passivhaus Windows and Doors

Windows are where Passivhaus airtightness and thermal bridging are hardest to control. This category includes Passivhaus window heads, cills and jambs in timber frame (Larsen truss and twin stud), timber I-beam, SIP, ICF, masonry cavity, masonry with Larsen trusses and concrete walls, plus airtightness details for timber frame windows and a rooflight wind-tightness detail.

Why are Passivhaus windows often installed over-insulated? Wrapping insulation over part of the frame reduces the thermal bridge at the window junction. Check the window manufacturer’s installation guidance for how far the frame can be covered.

Are these details Passivhaus certified? No. Certification depends on the whole building, its PHPP modelling and the products used.

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