Minimum Slope For Metal Roof With Snow

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.

Minimum slope for metal roof with snow.

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

The key factors are usually snow loading requirements adequate slope and the use of snow guards when needed. A minimum slope of 1 inch per foot is recommended in snow country. Standing seam manufactures allow applications of metal coverings on slopes of 12 or even more. 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.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. 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. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.