Skillion Roof Details Nz

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.

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. The roof could be constructed on or off site. The dimensions of the building are not critical and chosen only to show the effect. Pro clima nz ltd.

Skillion roof airflows modelled. 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 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.

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. The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture. Sarking and purlins depending on the roofing cladding roofs were either sarked or had purlins. In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other.

Share in skillion roofs the space between purlins and insulation is usually limited to 25mm meaning airflow below the roofing underlay is extremely restricted.