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.

Multiply the footprint square footage by the multiplier for your roof pitch to find the actual square footage of the roof. 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. Most roof s have a pitch in the 4 12 to 9 12 range. 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.

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. 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. Next find the square footage of the metal roofing panels you want to use.

Use our roof pitch calculator to find the pitch of your roof. A pvc roof is a lot more durable and longer lasting that a conventional epdm rubber roofing system. 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. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.