Skillion Roof Details Nz

The dimensions of the building are not critical and chosen only to show the effect.

Skillion roof details nz.

Vent s passive ventilation systems for skillion roofs have been designed to create continuous calculated unimpeded airflow that can exit the roof cavity. Sarking and purlins depending on the roofing cladding roofs were either sarked or had purlins. If you would move the detail above into a vertical position it would be like an external wall with vertical metal cladding. Skillion or exposed rafter roofs were framed up on site.

The building in the model has a 12 m long roof with 300 mm deep eaves. Skillion roof airflows modelled. Share in skillion roofs the space between purlins and insulation is usually limited to 25mm meaning airflow below the roofing underlay is extremely restricted. Pro clima nz ltd.

Airflow simulations were carried out for a monopitch skillion roof with profiled metal roofing with and without eaves. Skillion roofs skillion roofs incorporated a ridge beam or internal loadbearing wall to support the roof apex and generally had the ceiling lining fixed to the underside of the rafters with the roof cladding installed as done when there was a roof space. In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other. The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture.

The current standard skillion roof detail is often from the outside towards the inside metal roof cladding roof underlay purlin insulated rafters with a 25mm air gap and internal lining.