Minimum Pitch For Standing Seam Copper Roof

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12.

Minimum pitch for standing seam copper roof.

The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Sig zinc and copper recommend that the minimum pitch for a standing seam zinc roof is five degrees with an absolute minimum of 3 degrees. Seams can also be mitred into cladding pans for a seamless design. A 3 degree roof pitch means just over 50mm in every metre so over 3 metres you only have 150mm to play with.

Complete list of roofing types. Table 8 1c outlines the recommendations regarding flat seam construction. Thermoset and thermoplastic single ply roofing requires a minimum roof pitch of 1 4 12 or greater. Roof slope equivalents as rise.

There are some opinions that standing seam metal roof minimum slope is 12 but it increases the possibility of leaking on the few first days of snow arrival. Modified bitumen roofing requires a minimum roof pitch of 1 4 12 or greater. In retrofit projects a sub framing system is attached to the existing flat roof surface to provide a minimum 12 roof pitch. We recommend 5 degrees however due to site conditions and execution.

These pans run parallel to the slope of the roof and are joined to adjacent pans with double locked standing seams. Mansard roofs are usually steep but they often have changes in their slope. Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Minimum 3 degree pitch required for roofing.

Many modern building designs now incorporate the double lock standing seam system. Standing seam roof systems must have a minimum roof slope of 1 4 12. A standing seam design assures adequate draining from rain and snow effectively eliminating ponding leaks and related problems typically associated with built up roofs. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12.

The minimum recommendations are therefore the same as the base standing or batten seam roof. Standing seam roofing is composed of preformed or field formed pans usually between 14 to 18 inches wide when finished. The double lock standing seam is a traditional system that has been used historically throughout europe and america for many years. They are based on either standing or batten seam roofing.

The recommended dimensions should be specified from the table below. Degrees to pitch rise in run table.