Minimum Slope Rolled Roofing

The minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Minimum slope rolled roofing.

The minimum roof slope for metal roofs is dependent upon the roof profile. For example you may think you want classic composite shingles on your roof but if the pitch is below a certain ratio you may be forced to install a different type of roofing perhaps rolled roofing or. 2 1 2 12 minimum roof slope for clay and concrete tile. The corrugated metal roof minimum slope is 5 degrees.

3 12 minimum roof slope for metal roof panels with nonsoldered seams. It is the recommended slope as there is no guarantee if you opt for flatter pitch than this. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Match the roofing on the covered porch with the main roof.

Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The minimum pitch for shingles is 1 6 which is equivalent to 4. Learn about the liberty sbs self adhering base ply sheet.

If your roof pitch declines up to 1 inch vertically for every 12 inches horizontally 1 12 pitch it is a good candidate for rolled roofing as long as you use the concealed nail method of fastening. Minimum pitch for corrugated metal roof. Asphalt shingles continue to be the most widely installed roof covering option in north america. Many factors determine which roofing materials you can use and one make or break factor is the slope of the roof known as roof pitch.

Slate shingles minimum roof slope roof pitch r905 6 2. For steep slope roof systems ibc 2018 provides for a 1 12 minimum roof slope for mineral surfaced roof roll roofing. 2 12 minimum roof slope for asphalt shingles photovoltaic pv shingles and building integrated pv. Liberty sbs self adhering roofing system will provide long lasting protection for the low slope areas of your property without the danger or hassles associated with the installation of other conventional roofing products.

With regards to metal roofing the profile refers to the shape adopted by the metal sheets when they are bent to form the panels. To get the minimum pitch for a metal roof the vertical rise per foot is divided by the horizontal slope. The following table provides the minimum required allowable roof slope for each type of roofing material mentioned in the code. Minimum pitch for metal roof.

Mineral surfaced roll roofing can only be installed on roof slopes of 1 12 or greater 8 slope. Determine the minimum slope of the roof based on the roofing material.