Minimum Slope For Metal Roof With Snow

The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

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

The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. The key factors are usually snow loading requirements adequate slope and the use of snow guards when needed. 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. 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.

Metal roofing systems have a good track record of performance in harsh winter environments as long as they are properly designed. You can often see such examples of use over metal decks. A minimum slope of 1 inch per foot is recommended in snow country. 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.