It could be as low as 15 for a roof near the end of its service life.
Roof slope coverage.
Slopes greater than 18 12 are found on a frame roofs and some mansard style.
If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks.
The roofslope auxiliary sloping compound provides a quick and easy way to fill in low spots on flat roofs and achieve positive slope to aid in proper drainage.
See low slope roofing.
Read your policy carefully.
A roof slope of 7 12 is also good and can provide the additional benefit of helping minimize the effects of wind driven rain.
However from the wind uplift mitigation perspective a 7 12 roof slope can be considered as a two story building due to the higher overall steepness and profile of the roof.
Some sources consider low slope to include 3 12 pitch roofs.
This means you will get a percentage of the replacement cost based on the roof s material and age.
Repair coverage usually takes into consideration depreciation of the roof.
Low slope roofs are from 0 to 3 12 in pitch.