Metal Roof Pitch For Snow

Starting at 6 inches from the bottom edge place a snow guard in the center of each valley in a staggered pattern across the entire roof area.

Metal roof pitch for snow.

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. Begin by measuring 12 inches on your level and marking it with a pencil. 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. When the snow piled up on the roof melting occurred and ice dams resulted in water ponding 3 inches deep.

Metal roofs leak under these circumstances. Lap sealants shall be applied in accordance with the approved manufacturer s installation instructions. Others allow a 1 4 inch slope. Go up the roof 8 feet and repeat the staggered pattern of guards in the center of every valley.

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. The minimum pitch for metal roof shingles and lapped non soldered panels is 3 12. 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. Minimum pitch for metal roof for the most part the minimum pitch for metal roof installations depends on what kind of material you are installing and the method in which the material is being fastened.

If you are adding an addition to your home or installing skylights knowing the existing pitch is important. Roof pitches of 3 12 4 12 5 12 or 6 12 work best for metal buildings in snow country. A pvc roof is a lot more durable and longer lasting that a conventional epdm rubber roofing system. Anything less than 1 12 pitch is a huge mistake in snow prone climates.

You could also opt for a pvc flat roofing membrane. Standing seam metal roofs which allow snow to slide more easily might do. 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. Some metal building manufacturers will not warranty a roof with a 1 4 inch slope.

In country with heavy snow and tough winter days the metal roof minimum slope is recommended to be 1 12. Do not exceed 8 feet vertically between rows of guards.