Skillion Roof Details Nz

Skillion roof airflows modelled.

Skillion roof details nz. Sarking and purlins depending on the roofing cladding roofs were either sarked or had purlins. Roof skillion vented ridge cap w1111 1 typical valley detail counter battens w1121 1 1 skillion eave vented soffit w1131 1 skillion eave vented fascia w1131 3 skillion eave solitex um w1133 skillion eave solitex um a1133. Pro clima nz ltd. The building in the model has a 12 m long roof with 300 mm deep eaves.

In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other. Airflow simulations were carried out for a monopitch skillion roof with profiled metal roofing with and without eaves. The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture. Skillion or exposed rafter roofs were framed up on site.

Off site roof framing consisted of prefabricated timber trusses while on site roof framing consisted of a framework of rafters ridgeboard or a ridge beam underpurlins and underpurlin struts and collar ties and cleats. Vent s passive ventilation systems for skillion roofs have been designed to create continuous calculated unimpeded airflow that can exit the roof cavity. Share in skillion roofs the space between purlins and insulation is usually limited to 25mm meaning airflow below the roofing underlay is extremely restricted. If you would move the detail above into a vertical position it would be like an external wall with vertical metal cladding.

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