Metal Roof Slope Requirements

Mbma recommends a minimum slope of 1 2 in 12 2 4 degrees for through fastener metal roof systems and 1 4 in 12 1 2 de grees for standing seam metal roof systems.

Metal roof slope requirements.

Metal roofs with applied lap sealant shall be one half. In 12 0 25 in 12 1 19 built up roof coal tar pitch. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Ul 790 standard test methods for fire tests of roof coverings.

Metal roofs without applied lap sealant shall be three. Roofing material or system. The minimum slope for lapped. Determine the minimum slope of the roof based on the roofing material.

Minimum roof slope roof pitch r905 10 2 1. These systems are also referred to as hydrostatic roof systems or roofing with a pitch below 2 12. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope.

Units vertical in 12 units horizontal 25 percent. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. According to the 2012 international building code 1507 4 2 deck slope minimum slopes for roof panels need to comply with the following. And regional requirements that apply to metal roofing and wall systems.

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

For metal roof systems. The associa tion also stresses deflection of purlins. The minimum slope for lapped nonsoldered seam. But the ones we outlined are a good representation of common standards and testing that currently exist.

9 46 built up roof asphalt. Match roof material and use appropriate slope match the roofing on the covered porch with the main roof. 18 43 asphalt shingles with special underlayment requirements 2 in 12. Minimum required roof slope for roofing materials.

The minimum slope for lapped non soldered seam metal roofs without applied lap sealant shall be three units vertical in. Profile in the context of metal roofing means the shape that the sheet of metal is bent into to form the panels.