Branz Skillion Roof

Branz research provides guidance around the ventilation of these roofs.

Branz skillion roof.

By john wierenga 1 april 2014 build 141. The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture. Pink batts skillion roof insulation has been appraised as a thermal insulation material for timber framed skillion roofs of domestic and commercial buildings. Skillion roofs are commonly thought to pose more of a problem because their tight construction and narrow framing cavities provide little oppor tunity for air entiy and movement.

The dimensions of the building are not critical and chosen only to show the effect. Technical literature pink batts skillion roof insulation product data sheet nov16 1082revb november 2016. The roof space is generally inaccessible with little natural ventilation. Pitched roofs constructed with timber rafters are described in nzs 3604 2011 timber framed buildings as either couple close or skillion roofs.

In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other. The branz technical helpline has received queries on doing this so let s step through some examples. The building in the model has a 12 m long roof with 300 mm deep eaves. Skillion roof airflows modelled airflow simulations were carried out for a monopitch skillion roof with profiled metal roofing with and without eaves.