Roofing Material For A 2 12 Slope

Low pitched roofs aren t able to shed water and snow as easily.

Roofing material for a 2 12 slope.

Or the colon can replace the slash as in 2 12 or 7 12. At slopes lower than 2 12 on residential structures the primary roofing options are built up roofing bur often called tar and gravel modified bitumen and epdm see table 2 17 above. The traditional metal roof types such as 5v crimp shown above and corrugated are rated by the manufacturers for use down to a 3 12 pitch three inches of vertical rise for every foot of horizontal run. So a roof with four inches of rise every 12 inches horizontally run would have a slope of 4 12 sometimes displayed as 4 12.

Modified bitumen roofing minimum roof slope roof pitch r905 11 1. We are having a home constructed and desire to use metal roofing with shingles as the preferred product. That means the roofing material you choose needs to protect the materials underneath to prevent water damage and leaks. Can metal roofing be used on a low slope pitch roof.

One issue that has stumped the roofer is a low slope area of 2 12. Sunday august 5 2018. The metal shingle manufacturer will only guarantee to a 3 12 slope but will verbally state it should work with no problem. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

Modified bitumen membrane roofs must have a design roof slope of 1 4 12 or greater 2 slope. Roof pitch designations are comprised of two numbers indicating a ratio. If roofing material is installed on a roof with a slope that is less than what is specified by the manufacturer it will void the warranty. A 2 12 roof slope is considered low so the roofing materials you would use on a steeper roof may not work.

Tile is an expensive roofing material with costs that can range from 10 to 18 per square foot installed though more uncommon ceramic tiles can run as much as 30 per square foot installed. It s the go to material in snow country. Metal roofing costs about three times as much as asphalt shingles but it lasts from 50 to 70 years so metal is the less expensive option in the long run metal roofing comes in panels shingles and tiles and in a variety of durable finishes. Clay tile is a very long lasting roofing material that can last more than a century.

This is particularly important to pay attention to when using metal roofing products such as standing seam metal which have a multitude of profiles attachment methods and seam lap joint styles which can affect the recommended slope. Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. This means for every 12 horizontal units the roof must rise a minimum of one quarter vertical unit.