Most shingles may be applied on roof slopes of 2:12 to 4:12 (a “low slope” roof), providing that the shingles are adequately sealed against wind lift, and special procedures are followed. In many building codes, allowances are made to permit applications of asphalt shingles to low sloped roofs.
What is the lowest slope you can put shingles on?
The minimum roof pitch for shingles is a 2:12 pitch.
If your roof is less than 2 vertical units (inches or feet) up for every 12 horizontal units out, it’s considered low slope.
What type of roofing is best for a low pitch roof?
Metal roofing systems are popular because of their longevity and durability. Rubber roofs are a top choice for flat or low pitched roofing as it adheres to the roofing materials below it and, when installed correctly, provides a watertight seal to the elements.
Can you put shingles on a 2 12 pitch roof?
Asphalt shingles are an effective roof covering material for sloped roofs that can be successfully used on slopes as low as 2:12. … Asphalt shingles should never be applied to roof slopes below 2:12 (2” of vertical rise for every 12” of horizontal run, or 9.5°).
How flat Can a shingle roof be?
Can a Roof Be Too Flat for Shingles? Yes! The minimum pitch for asphalt shingles is 2/12 inches, and anything less than this is too flat for shingles.
What is considered a low slope roof?
A low-slope roof is one that has a slope of less than 3-in-12. This means that for every horizontal foot, the roof level goes up less than 3 inches vertically.
Can you put shingles on a 3/12 roof?
The National Roofing Contractors Association recommends that asphalt shingles be installed only on roofs with slopes that are 3/12 and greater.
Can you put shingles on a 1/12 pitch?
The asphalt shingle manufactures recommend that you install asphalt shingles on a recommended minimum of 4 in 12 or greater however most manufactures will warrant their shingles down to a 2 in 12 pitch if the recommended installation method is used.
What kind of roof do I need for a 2 12 pitch?
A pitch of 2/12 is the minimum for shingles made of asphalt, so your roof just barely makes the cut-off for one of the most popular roofing material options. Resilient asphalt shingles lie much flatter to the substrate than slate, tile and concrete, which keeps water from being easily blown under them.
Can you use asphalt shingles on a flat roof?
It’s true that flat roofs aren’t exactly flat, they have a small pitch of a few degrees. Still, you cannot put shingles on a flat roof as water does not drain off them quickly enough. The absolute minimum slope for asphalt shingle installation is 2:12.
Why don’t they put shingles on a flat roof?
Roofing materials that are layered similar to shingles are not effective on flat roofs mainly because they use the same layering technique. Some of these other materials are: Slate Shingles.
What is the best material to use for flat roofs?
For many projects, PVC roofing is our preferred choice as the best flat roof material on the market. PVC roofing is somewhat more expensive than other single-ply commercial roofing materials, however it offers a wide range of benefits for the price.