The minimum slope for a flat roof is 1 4 per foot or 1 4 12 but some owners or insurance companies require a minimum slope of 1 2 per foot.
Minimum slope for epdm roof.
Pvc membrane assemblies generally have higher maximum roof slope limitations.
The roofer was not calling back and i had to determine with your input a proper pitch for the new epdm.
And if the performance of single ply epdm roofing on commercial installations is any measure weatherbond 110 can certainly last much longer than 12 years if it s properly installed.
A minimum slope of 0 25 inches per foot 2 percent is recommended for all low slope roofing systems for adhered systems the substrate must be one that is approved by the system supplier.
The 12 year weatherbond warranty is to date the best i ve found in the category of residential low slope roofing products.
Normally 1 80 0 72 is the recommended minimum angle for a slope and this is universal across the vast majority of flat roofing systems regardless of the materials that they incorporate.
The roof surface will be made clean dry smooth and free of contaminants such as grease animal fats coal tar and oil based products.
For example some epdm membrane assemblies have maximum roof slope limitations as low as 1 2 12.
Some tpo membrane assemblies also have relatively low maximum roof slope limitations.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
I opened the roof and added new rafters from the outer wall to the higher up top plate of the house like its supposed.
The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code.
Perlite board is not acceptable due to its relative dusty surface and low peel resistance.
Higher density products provide improved impact resistance.
Roof ceiling joists nailed to the house.
About 1 slope if that in 12.
The rear room addition flat roof was blue tarped.