Metal Roof Pitch For Snow

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.

Metal roof pitch for snow.

Go up the roof 8 feet and repeat the staggered pattern of guards in the center of every valley. There are some opinions that standing seam metal roof minimum slope is 12 but it increases the possibility of leaking on the few first days of snow arrival. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. Standing seam metal roofs which allow snow to slide more easily might do.

When the snow piled up on the roof melting occurred and ice dams resulted in water ponding 3 inches deep. In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Anything less than 1 12 pitch is a huge mistake in snow prone climates. 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. Others allow a 1 4 inch slope. Metal roofs leak under these circumstances. Roof pitches of 3 12 4 12 5 12 or 6 12 work best for metal buildings in snow country.

Do not exceed 8 feet vertically between rows of guards. 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. Begin by measuring 12 inches on your level and marking it with a pencil. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope.

Lap sealants shall be applied in accordance with the approved manufacturer s installation instructions. If you are adding an addition to your home or installing skylights knowing the existing pitch is important. Anything over a 6 12 pitch tends to make massive amounts of snow slide off the roof without warning. You can safely measure the roof pitch from inside your attic with a level that is either 18 or 24 inches a tape measure and a pencil.

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. Some metal building manufacturers will not warranty a roof with a 1 4 inch slope.