How Much Pitch Does A Metal Roof Need

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.

How much pitch does a metal roof need.

Next find the square footage of the metal roofing panels you want to use. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. 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.

A pvc roof is a lot more durable and longer lasting that a conventional epdm rubber roofing system. Most roof s have a pitch in the 4 12 to 9 12 range. The table below shows common roof pitches and the equivalent grade degrees and radians for each. Measure the length and width in feet then multiply together to find the square footage.

Multiply the footprint square footage by the multiplier for your roof pitch to find the actual square footage of the roof. Use our roof pitch calculator to find the pitch of your roof. You could also opt for a pvc flat roofing membrane. 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.