Passivhaus Roof Construction

Excellent levels of thermal comfort.

Passivhaus roof construction.

The main diagram below shows how the three passive elements roof wall and foundation link together. All mbc passive roof systems deliver a u value of 0 10w m2k. Some of the key characteristics of a passivhaus include. 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.

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. Clad in vertical timber panels the exterior façade nods to the traditional agricultural buildings in the area. Passivhaus is an entirely voluntary building performance standard that anyone setting out to build a low energy home might be interested in. 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.

Yes timber is a suitable passivhaus construction system. The irish standard part l 2011 for a traditional roof structure is 0 16 w m2k. Click image to expa nd. 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 is very close to the passivhaus standard 0 10 0 15 w m2k however it still does satisfy it. There are at least three good reasons for timber construction being popular for passivhaus. Fink truss attic truss the vaulted roof and the flat roof. 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.

The individual roof type diagrams show the detail associated with each roof type. The passivhaus standard developed in germany is a low energy design standard. Timber in all its forms structural framing studwork panels mass timber is suitable.