Branz Skillion Roof Ventilation

Roof space ventilation can reduce the risk of these problems.

Branz skillion roof ventilation. The four factsheets are. Roof ventilation factsheet 4. 7 3 pink batts skillion roof insulation is designed to be friction fitted between timber roof framing rafters in skillion roofs. Funded by branz ministry of science innovation.

These factsheets cover risk factors to watch out for how to tackle moisture transfer into roof spaces the air permeability of ceilings and ceiling penetrations and designing roof space ventilation. Branz physicists have developed a useful calculation for designers to work out the minimum number and area of vents required in roof spaces. Skillion roofs need carefully designed and installed ventilation to reduce the risk of moisture related problems. In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other.

The article vents in skillion roofs in build 155 discussed the placement of vents for skillion roof ventilation in low wind zones. A placed on top of the purlins the vent vented batten ensures unimpeded airflow above the purlin. 0 00 free download pdf close description. Passive ventilation specialist vent has developed comprehensive ventilation systems for both mono pitch and pitched skillion roofs.

It updates and replaces branz bulletin 443 timber shingles and shakes. Some roof designs such as skillion roofs must include ventilation to manage roof moisture. Design and installation of timber shingle and shake roof cladding. Moisture and ventilation in skillion roofs from www branz co nz price.

Roof space ventilation provides air exchange in the spaces above the ceiling insulation and below the roof cladding. Recent branz research provides advice on the best place for effective vent openings in low wind zones. To mitigate the risk of internal moisture both branz and the metal roofing manufacturers association of new zealand highly recommend ventilating skillion roofs. G2500n vent over fascia vent which allows calculated airflow into the roof cavity vb20 vent vented batten performs two functions.

Present work is focusing on moisture and ventilation in skillion type residential roofs. Roof space ventilation in new zealand houses. As recommended by branz build 155 vents in skillion roofs. Air pressures on a monopitch skillion roof a with and b without eaves.