2 In 12 Roof Slope

Also if asphalt shingles are installed on a roof slope of 2 12 to 4 12.

2 in 12 roof slope.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Simply put it s a shallow roof. For a 3 8 inch in 12 inch slope. 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.

Divide the rise by the run and multiply by 100. I am going to be roofing a building that has some areas that are 2 in 12 pitch. I am going to be using comp shingles and double felt. Roof pitch refers to the slope which the rafter creates.

For a 6 1 2 inch in 12 inch slope 6 1 2 6 5 arctan 6 5 divided by 12 arctan 0 54167 28 44 slope. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.