The roof of a passive house: bringing insulation, airtightness and ventilation together
A passive house roof requires combining insulation, airtightness and ventilation, not just choosing thick PIR. The building owner should check where the heated part of the house ends and how junctions at the wall plate, ridge and windows are designed. Airtightness is confirmed by a pressure test, and heat-recovery ventilation must work with the envelope. It is also worth assessing summer overheating risk and planning duct penetrations before insulation is installed. The material alone does not guarantee the standard – calculations and measurements for the whole building are needed.









