Roof coverings installed on low slope roofs roof slope 2 12 in accordance with section 1507 shall resist impact damage based on the results of tests conducted in accordance with astm d 3746 astm d 4272 cgsb 37 gp 52m or the resistance to foot traffic test in section 5 5 of fm 4470.
Minimum slope shingle roof in orange county florida.
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Thermoplastic single ply membrane roofs must have a design roof slope of 1 4 12 or greater 2 slope.
The minimum requirement is 2 12.
All structural metal roofing systems.
Asphalt shingles shall have the minimum number of fasteners required by the manufacturer but not less than four fasteners per strip shingle or two fasteners per individual shingle.
Asphalt shingles continue to be the most widely installed roof covering option in north america.
The requirements for an asphalt shingles roof are contained in the international building code.
Roof slopes of four units vertical in 12 units horizontal 33 percent slope or greater.
According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal.
Shingles of all types need to have a slope to function properly.
Thermoplastic single ply roofing minimum roof slope roof pitch r905 13 1.
Florida has more roofing regulations than you may realize.
In wind zones greater than 110 mph fastening is based.
The same can also be the case when the tiled roof has a reduced exposure.
Where the roof slope exceeds 21 units vertical in 12 units horizontal 21 12 175 percent slope shingles shall be installed as required by the manufacturer.
The 2 12 number is rise over run or two units of vertical for every 12 units horizontal.
Underlayment shall be applied shingle fashion parallel to and starting from the eave and lapped 4 inches 51 mm end laps shall be 6 inches and shall be offset by 6 feet.
Roof assemblies rooftop structures 1507 roof coverings with slopes 2 12 or greater.
Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.
There are laws regarding who can work on roofs how roofs must be installed or repaired when roofs may be reroofed and much more.
This means for every 12 horizontal units the roof must rise a minimum of one fourth vertical unit.
Experience the total owens corning roofing system and high quality roofing shingles.
What is the minimum slope for an asphalt shingle roof the short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.
1507 3 asphalt shingles 1507 3 6 fasteners requires the use of roofing nails 1507 3 7 attachment in wind zones up to 110 mph prescriptive provision of 4 fasteners per shingle.
Minimum slope for asphalt shingles.
Most of these laws are found in the sixth edition of the florida building code which went into effect on dec.
Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you.
