How Much Pitch Does A Metal Roof Need

The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run.

How much pitch does a metal roof need.

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. Use our roof pitch calculator to find the pitch of your roof. 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. A pvc roof is a lot more durable and longer lasting that a conventional epdm rubber roofing system.

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. Measure the length and width in feet then multiply together to find the square footage. Most roof s have a pitch in the 4 12 to 9 12 range. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. You could also opt for a pvc flat roofing membrane. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. The table below shows common roof pitches and the equivalent grade degrees and radians for each.