Passivhaus Roof

Passivhaus roofs need continuous insulation and an unbroken airtight layer where the roof meets the walls. This category includes eaves and verge details for Passivhaus timber frame, timber I-beam, Larsen truss, ICF, masonry cavity and concrete constructions, a concrete flat roof, and airtightness and wind-tightness details for timber frame eaves, verges, rooflights and warm roof service penetrations.

Why do Passivhaus roof details focus on eaves and verges? That’s where the wall and roof insulation and airtight layers meet. Gaps or misalignment there cause thermal bridging and air leakage.

Are these details Passivhaus certified? No. They show approaches used on Passivhaus projects, but certification depends on the whole building, its PHPP modelling and the products used.