A 4 12 pitch being 4 inches of vertical rise over one foot or 12 inches of horizontal run.
How much pitch on 12 foot roof.
The ibhs recommends a 4 to 6 pitch roof.
One engineer recommends a 12 12 pitch for the new roof while another recommends a 7 12 pitch.
The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.
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.
Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.
There are advantages and disadvantages to having a steep pitch versus a shallow or low pitch the most obvious of which is the roof s ability to shed or withstand heavy snow rain or wind.
If this distance measures 4 inches you have a 4 in 12 pitch.
On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.
The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.
In roofing it is expressed in inches of vertical rise over inches of horizontal run.
The minimum pitch for roll roofing is 2 12 or 2 inches rise to 12 inches run.
8 inches and you have an 8 in 12 pitch.