Design and installation of timber shingle and shake roof cladding.
Branz skillion roof ventilation.
Funded by branz ministry of science innovation.
Skillion roofs need carefully designed and installed ventilation to reduce the risk of moisture related problems.
Passive ventilation specialist vent has developed comprehensive ventilation systems for both mono pitch and pitched skillion roofs.
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.
To mitigate the risk of internal moisture both branz and the metal roofing manufacturers association of new zealand highly recommend ventilating skillion roofs.
The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture.
0 00 free download pdf close description.
Branz physicists have developed a useful calculation for designers to work out the minimum number and area of vents required in roof spaces.
Air pressures on a monopitch skillion roof a with and b without eaves.
Present work is focusing on moisture and ventilation in skillion type residential roofs.
Roof space ventilation provides air exchange in the spaces above the ceiling insulation and below the roof cladding.
A placed on top of the purlins the vent vented batten ensures unimpeded airflow above the purlin.
In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other.
Roof ventilation factsheet 4.
Roof space ventilation in new zealand houses.
Roof space ventilation can reduce the risk of these problems.
Some roof designs such as skillion roofs must include ventilation to manage roof moisture.
7 4 pink batts skillion roof insulation is designed to maintain its labelled nominal thickness and to maintain ventilation in a skillion roof application.
Recent branz research provides advice on the best place for effective vent openings in low wind zones.
7 3 pink batts skillion roof insulation is designed to be friction fitted between timber roof framing rafters in skillion roofs.
As recommended by branz build 155 vents in skillion roofs.
It updates and replaces branz bulletin 443 timber shingles and shakes.
Moisture and ventilation in skillion roofs from www branz co nz price.
The article vents in skillion roofs in build 155 discussed the placement of vents for skillion roof ventilation in low wind zones.
