Passivhaus Roof Construction

The individual roof type diagrams show the detail associated with each roof type.

Passivhaus roof construction. Consuming up to 90 less heating and cooling energy than conventional buildings and applicable to almost any building type or design the passive house high performance building standard is the only internationally recognized proven science based energy standard in construction delivering this level of performance. Passivhaus is an entirely voluntary building performance standard that anyone setting out to build a low energy home might be interested in. Timber in all its forms structural framing studwork panels mass timber is suitable. To achieve the passivhaus standard passive roofs need high levels of insulation thermal bridges need to be eliminated and the structure itself needs to be airtight.

This passivhaus in berkshire was built by tom gresford of gresford architects using a prefabricated timber frame constructed off site and then erected on site to airtight stage within two weeks. Structural stability we have used steel structural ridge purlins to carry the main load of building which are inside the thermal envelope so not creating a thermal bridge. And it is a popular choice for passivhaus. Clad in vertical timber panels the exterior façade nods to the traditional agricultural buildings in the area.

Yes timber is a suitable passivhaus construction system. All mbc passive roof systems deliver a u value of 0 10w m2k. It was developed in 1990 over 25 years ago and some estimates suggest there are well over 50 000 passivhaus buildings around the world. The irish standard part l 2011 for a traditional roof structure is 0 16 w m2k.

The roof detailing at the golcar passivhaus is in fact similar to that at our stirley farm enerphit project. Some of the key characteristics of a passivhaus include. This is very close to the passivhaus standard 0 10 0 15 w m2k however it still does satisfy it. Fink truss attic truss the vaulted roof and the flat roof.

The main diagram below shows how the three passive elements roof wall and foundation link together. Excellent levels of thermal comfort. Click image to expa nd.