Min Slope For Standing Seam Metal Roof

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

Min slope for standing seam metal roof.

Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. Most residential metal roofs require at least a 3 12 roof pitch and have no maximum roof pitch. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. It may well work in most climates but it is in no way comparable in its robustness to a conventional standing seam roof on a pitch of 3 12 and over.

Roofing material or system. 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 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. 18 43 asphalt shingles with special underlayment requirements 2 in 12.

Speaking about standing seam metal roof slope it is a general and a self evident knowledge that the steeper it is the faster it is for snow rain or drain to come down the roof. Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. That means there is at least 3 of vertical rise to the roof slope for every 12 it goes back horizontally. This recommendation con flicts with some manufacturers who list 1.

The nrca roofing and waterproofing manual fifth edition states the mini mum slope for structural metal panel roof systems should be 1 2 in 12 2 4 degrees. You can often see such examples of use over metal decks. That is a 14 degree angle. If you want to use a metal roof that relies for it s integrity on double sided tape sealant and closure strips fly at it.

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. In 12 0 25 in 12 1 19 built up roof coal tar pitch. Minimum required roof slope for roofing materials.