The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.
Maximum slope for epdm roofing.
A roof slope of 7 12 is also good and can provide the additional benefit of helping minimize the effects of wind driven rain.
Rubbergard r m a get uninterrupted protection.
Higher density products provide improved impact resistance.
The rubbergard max epdm membrane is an internally reinforced cured single ply roofing membrane that is designed to combat roof tears and punctures and provides superior resistance to wind forces.
Epdm is fine if there is enough slope to drain any water off the roof within 24 hours of the last percipitation event.
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.
Maximum height maximum warranty term m 80 24 4 adhered 090 platinum see platinum design guide unlimited ok 250 76 2 m 30 year 060 rubbergard epdm unlimited ok 250 76 2 m 25 year 045 rubbergard epdm unlimited ok 250 76 2 m 15 year d pavers 060 rubbergard epdm max.
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.
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.
System product slope barrel arch etc.
With the rubbergard r m a.
In order to achieve this drop a slightly steeper angle of 1 40 1 44 should be the aim when installing a flat roof as this accounts for surface.
Although building codes do not directly prescribe maximum allowable roof slopes fire classifications which are required by code often do include maximum roof slope limitations.
The maximum recommended roof slope for mechanically attached roofing systems is 18 in one horizontal foot.
1 8 slope per foot is more than adequate.
There are no maximum slope restrictions for the application of the fully adhered roofing system.
The main component of the roofing system is the firestone rubbergard membrane a tough flexible epdm ethylene propylene diene terpolymer based sheet which is fully vulcanized to provide excellent dimensional stability and weathering resistance.
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For example some epdm membrane assemblies have maximum roof slope limitations as low as 1 2 12.
