Minimum Slope For Epdm Roof

Higher density products provide improved impact resistance.

Minimum slope for epdm roof.

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. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. 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 12 year weatherbond warranty is to date the best i ve found in the category of residential low slope roofing products.

I opened the roof and added new rafters from the outer wall to the higher up top plate of the house like its supposed. 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. Some tpo membrane assemblies also have relatively low maximum roof slope limitations. Roof ceiling joists nailed to the house.

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems. Roof slope should be a minimum of 2 to allow for adequate drainage of the roof taking into account the deflection of the roof. The roof surface will be made clean dry smooth and free of contaminants such as grease animal fats coal tar and oil based products. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

Perlite board is not acceptable due to its relative dusty surface and low peel resistance. For example some epdm membrane assemblies have maximum roof slope limitations as low as 1 2 12. The roofer was not calling back and i had to determine with your input a proper pitch for the new epdm. 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.

About 1 slope if that in 12. The rear room addition flat roof was blue tarped.