Minimum Roof Pitch Michigan

The minimum roof pitch is also subject to the standards set forth by the various building codes used in the respective regions.

Minimum roof pitch michigan.

The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. 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. Asphalt shingles continue to be the most widely installed roof covering option in north america. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends.

Importance of a roof pitch. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The minimum requirement is 2 12. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

The minimum slope for standing seam roof systems shall be one quarter unit vertical. The chief reason for having a roof pitch is to redirect water and snow away from the roof and avoid any percolation that might result from stagnation of water on the roof. Roof slope multipliers for roof components of sloping roofs multiply by the figures given below to obtain the cost per square foot of horizontal projection. Lap sealants shall be applied in accordance with the approved manufacturer s installation instructions.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Shingles of all types need to have a slope to function properly. What is the minimum pitch slope of an asphalt shingle roof. You could also opt for a pvc flat roofing membrane.

However you can only use this pitch with built up roofing or specialized synthetic roofing. The minimum slope for lapped nonsoldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope. Rise multiplier rise multiplier 1 to 12 1 01 6 to 12 1 12 2 to 12 1 01 8 to 12 1 20 3 to 12 1 03 12 to 12 1 42 4 to 12 1 06 15 to 12 1 60 5 to 12 1 08 18 to 12 1 80. Apply a minimum 19 inch wide 483 mm strip of underlayment felt parallel with and starting at the eaves fastened sufficiently to hold in place.

That works out to about nine degrees if that works better for you.