Roof Pitch In Michigan

However you can only use this pitch with built up roofing or specialized synthetic roofing.

Roof pitch in michigan.

Roof pitch is used to describe the slope or angle of the roof. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building. 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 roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. Importance of a roof pitch. Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch diameter 9 5 mm head complying with astm f1667 of a length to penetrate through the roofing materials and not less than 3 4 inch 19 1 mm into the roof sheathing. Flat and nearly flat roofs a pitch of 1 in 12 or 2 in 12 cannot be covered with shingles or shakes of any material since there is not enough angle to combat the danger of blow off.

How roof pitch determines suitable roofing systems. 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. However roof pitch is technically measured and defined differently and will not be discussed here. 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.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. For that reason flat roofs are limited to these types of covering materials. Note that roof pitch is sometimes used in parallel with roof 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.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.