Low Slope Roof Shingles

Shingles that are not self sealing must be hand sealed with asphalt roofing cement.

Low slope roof shingles.

The acceptable underlayment installation options for low slopes are described in the canadian standards association asphalt shingle application standard csa a123 51 as follows. They typically had different underlayment recommendations for low slope roofs 2 12 to 4 12 pitches but that was about it. A 3 per foot slope is considered low but may be acceptable if a double layer of felt is used. Low slope roofing shingles.

Cover the entire low sloped roof area with a self adhered modified bituminous membrane that will act as an ice and water. Most manufacturer and industry recommendations require or at the very least recommend special underlayment or other considerations on roofs between 2 12 and 4 12. Some will argue that shingles shouldn t be used for low pitch roofs at all. If you have a low slope roof but would love to have a shingled look rather than other solutions like rolled sheet roofing you are in luck.

Some building codes allow as low as a 2 slope with asphalt shingles if additional steps are taken. However those naysayers would be wrong. And by the way the manufacturers instructions i reviewed for the shingles i was interested in buying described installations down to a 2 12 pitch. 3 tab shingles versus laminated shingles for low slope roof.

As well a slope of 4 12 is most commonly considered the lowest slope for standard shingle installations.