2 In 12 Roof Slope

For a 3 8 inch in 12 inch slope.

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. The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Simply put it s a shallow roof. 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.

Divide the rise by the run and multiply by 100. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Please share any tricks or tips for making this roof water tight. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

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. Also if asphalt shingles are installed on a roof slope of 2 12 to 4 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 following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.

Asphalt shingles can only be installed on roof slopes of 2 12 or greater. I am going to be using comp shingles and double felt. I am going to be roofing a building that has some areas that are 2 in 12 pitch. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units.