Steel Roofing Minimum Slope

Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems.

Steel roofing minimum slope.

The corrugated metal roof minimum slope is 5 degrees. Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. The pitch is measured in inches of vertical rise per foot of horizontal run and the 5v crimp profile shown above requires a minimum slope of three in twelve or 3 12 3 inches vertically per 12 inches horizontally. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Typically low slope metal roof systems vary in weight from 40 to 135 pounds per 100 square feet making them among the lightest roofing products and the easiest to install. The minimum roof slope for metal roofs is dependent upon the roof profile. A lightweight roofing system also places fewer demands on a building s structural support system an important consideration in earthquake prone areas. That said if you want to have a metal roof that is worth its weight in value that doesn t come with a ton of problems the minimum pitch for metal roof applications should be kept at around at least a 3 1 2 12 three and a half on 12 or above.

This means for every 12 horizontal units the roof must rise a minimum of 3 vertical units. It is indeed the metal roof profile that is most used around the world which can be. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. Most buildings with metal roofing system are using corrugated roofing type.

Lapped nonsoldered seam metal roofs with applied lap. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

See the below florida building code fifth edition 2014 2017 sections below to determine which slope is appropriate based on your specific design scenario. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The required roof slope varies with application of materials and use.

Minimum pitch for metal roof. The minimum roof slope requirement for metal panels varies depending on panel connection conditions. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels. Depending on the roof profile there are minimum roof slope requirements for each panel which need to be considered.