2 In 12 Roof Slope

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.

2 in 12 roof slope.

I am going to be using comp shingles and double felt. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Please share any tricks or tips for making this roof water tight. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

I am going to be roofing a building that has some areas that are 2 in 12 pitch. 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. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Also if asphalt shingles are installed on a roof slope of 2 12 to 4 12. Simply put it s a shallow roof. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

For a 3 8 inch in 12 inch slope. Divide the rise by the run and multiply by 100. 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. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.