You can go by the measurements taken by walking the roof.
0 3 roof pitch.
The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.
A completely flat roof is a poor design as water and snow will collect on it eventually leading to your roof collapsing in from the weight of it all.
The exact roof slope in degrees is given by the arctangent.
The smallest pitch of a roof is 0 5 12.
A common choice for flat roofing material is epdm rubber as it is highly durable waterproof and can be made from recycled materials.
Roof pitch defined and explained.
Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow.
Definitions vary on when a roof is considered pitched.
1 pitch 1 01 2 pitch 1 02 3 pitch 1 03 4 pitch 1 05 5 pitch 1 085 6 pitch 1 12 7 pitch 1 16 8 pitch 1 21 9 pitch 1 25 10 pitch 1 31 11 pitch 1 36 12 pitch 1 42.
Roof pitch designations are comprised of two numbers indicating a ratio.
Roof pitch is used to describe the slope or angle of the roof.
The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 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.
In degrees 10 2 in 12 or 1 in 6 is considered a minimum.
Or the colon can replace the slash as in 2 12 or 7 12.
0 pitch 1 00x the roof area.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.