Minimum Slope For Metal Roof With Snow

To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.

Minimum slope for metal roof with snow.

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. 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. 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. You can often see such examples of use over metal decks.

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Most metal roofs will have minimum pitches of three in twelve but this might sometimes go down depending on whether there are special installation procedures issued by the manufacturer regarding that particular roofing material. 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. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Minimum pitch for metal roof for the most part the minimum pitch for metal roof installations depends on what kind of material you are installing and the method in which the material is being fastened. A minimum slope of 1 inch per foot is recommended in snow country. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.