Passivhaus Roof Construction

Fink truss attic truss the vaulted roof and the flat roof.

Passivhaus roof construction.

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. Passivhaus is an entirely voluntary building performance standard that anyone setting out to build a low energy home might be interested in. The individual roof type diagrams show the detail associated with each roof type.

Timber in all its forms structural framing studwork panels mass timber is suitable. 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. The passivhaus standard developed in germany is a low energy design standard. 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.

The main diagram below shows how the three passive elements roof wall and foundation link together. 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. There are at least three good reasons for timber construction being popular 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 s gaining lots of attention in the uk and is based around the principle of reducing heating demand to a very low level rather than relying on renewables.

The roof detailing at the golcar passivhaus is in fact similar to that at our stirley farm enerphit project. 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.