Minimum Slope For Metal Roof Nz

New zealand metal roofing manufacturers inc.

Minimum slope for metal roof nz.

When designing for low pitched roofs in heavy rain areas dimondek 400 and dimondek 630 are excellent. Corrugated roofing is an amazing choice for conventional pitched roof despite having the severe limitation about the pitch. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this.

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. The new zealand building code sets the minimum performance parameters for the design and construction of roofs. Made form galvsteel zincalume colorsteel. It is corrosion and fume resistant econom ical requires only simple tools for fixing and its flexibility and light weight gives planning and design freedom over many other roofing materials.

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. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. The corrugated metal roof minimum slope is 5 degrees. Nz s leading provider of metal steel roofing products for residential commercial customers.

Metalcraft roofing are members of the roofing association new zealand and the new zealand metal roofing manufacturers incorporated. New zealand metal roofing manufacturers inc. All dimond profiles are suitable for low pitch roofs under 12 5 and range from a minimum pitch of 3 to 8 with a capillary groove or gap in the under rib to reduce leakage through the side lap. April 2012 nz metal roof and wall cladding code of practice v 2 2.

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Minimum roof cladding pitch 4 8 2. Longer lengths require specific design. Minimum pitch the minimum roof pitch for corrugate is 8 degrees approx 1 7 and if end lapped 10 degrees approx 1 6.

A number of new zealand and joint australian new zealand standards cover roof construction roofing materials and components. April 2012 nz metal roof and wall cladding code of. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.