Steel Roof Cladding Minimum Pitch

Concealed fix minimum roof pitch.

Steel roof cladding minimum pitch.

The standard of lower pitch actually ranges between 1 12 to 5 12. Panels joined with an applied lap sealant can go as low as 12. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. The minimum pitch allowed for metal shingles is a 3 12 ratio whereas metal panelling can be applied down to a 1 12 ratio.

The pitch of a roof is expressed in a ratio of rise over run creating a theoretical triangle with these numbers to illustrate the amount of slope. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope. Concealed fix kliplok roof profile available materials. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Orientation roofing and vertically laid cladding. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Typically two continuous runs of 6 5 or 6mm diameter butyl sealant strips are used. Resin coated zincalume zincalume with colorbond coating.

Galvanised steel steel with chromadek coating. The lower run is the primary weather seal and should be positioned as close as possible to the edge of the top sheet. After that the miimum pitch for metal panels depending on the methods used to join the panels. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot.

Fixings secret fixed lug system for long sheet lengths. 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 profile is made up of a series of corrugations each in the shape of a trapezium refered to as trapezoidal profile which lap together side to side and end to end making it very easy to cover varying areas of roof quickly. In fact the larger the first number becomes the steeper the slope.

The standard end lap arrangement for trapezoidal steel weather sheets at any roof pitch greater than or equal to 4 is shown in fig 12. 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 three in twelve or 3 12 3 inches vertically per 12 inches horizontally. Profiled roof systems are best suited for roof pitches greater than 5 degrees. The profile sheets are typically coated steel but can.

Corrugated metal roofing has the same minimum pitch.