Skillion Roof Details Nz

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.

Skillion roof details nz.

The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture. The building in the model has a 12 m long roof with 300 mm deep eaves. The dimensions of the building are not critical and chosen only to show the effect. 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.

In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other. Skillion or exposed rafter roofs were framed up on site. 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 roof could be constructed on or off site. Share in skillion roofs the space between purlins and insulation is usually limited to 25mm meaning airflow below the roofing underlay is extremely restricted. Sarking and purlins depending on the roofing cladding roofs were either sarked or had purlins. Skillion roof airflows modelled.

Airflow simulations were carried out for a monopitch skillion roof with profiled metal roofing with and without eaves.