Minimum Pitch For Metal Roof Nz

Panels joined with an applied lap sealant can go as low as 12.

Minimum pitch for metal roof nz.

Minimum roof pitch for metal building. The new zealand building code sets the minimum performance parameters for the design and construction of roofs. Metalcraft roofing are members of the roofing association new zealand and the new zealand metal roofing manufacturers incorporated. Amongst many decisions one has to make when designing a metal building determining metal roof minimum slope is one of them.

Minimum pitch the minimum roof pitch for corrugate is 8 degrees approx 1 7 and if end lapped 10 degrees approx 1 6. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels. However after seeing issues of water ponding as roofs settle over time the metal roofing industry changed this in the 1970 s to a minimum pitch of 3 for all coated steel and aluminium products. It determines how many inches the roof should rise for every 12 inches expanding on the horizontal side.

Roof pitch is the degree of building s roof slope. April 2012 nz metal roof and wall cladding code of practice v 2 2. Medium pitch roofs 3 10 for medium pitch roofs between 3 and 10 the roofing options extend to include metal roofing. However it has largely been replaced by zinc aluminium alloy coated mild steel.

The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of. The minimum pitch for metal roofing varies depending on the profile of the metal. Raising the minimum roof pitch of all coated steel and aluminium products gives enough tolerance to avoid roof deterioration and ensure the roof. A number of new zealand and joint australian new zealand standards cover roof construction roofing materials and components.

The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal 25 percent slope. For low slope metal roofs under 12 that are nearly flat modified bitumen roofing thermoset and. Longer lengths require specific design. April 2012 nz metal roof and wall cladding code of.

Made form galvsteel zincalume colorsteel. When a combination of sheets provide a run of in excess of 40 metres and up to 60 metres the roof pitch should be increased by 1 degree. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. Metal roofing corrugated galvanised mild steel has a long history of use in new zealand and has become a construction icon.

After that the miimum pitch for metal panels depending on the methods used to join the panels. New zealand metal roofing manufacturers inc. Nz s leading provider of metal steel roofing products for residential commercial customers.