Low Slope Roof Shingles

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

Low slope roof shingles.

Some will argue that shingles shouldn t be used for low pitch roofs at all. The usual slope for asphalt shingles is a 4 or greater rise for every horizontal foot of run. However those naysayers would be wrong. Cover the entire low sloped roof area with a self adhered modified bituminous membrane that will act as an ice and water.

Low slope roofing shingles. Low slope roofs present a challenge where water is concerned. 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. The acceptable underlayment installation options for low slopes are described in the canadian standards association asphalt shingle application standard csa a123 51 as follows.

3 tab shingles versus laminated shingles for low slope roof. This low slope application requires a double layer of 15 felt underlayment cemented together for a distance extending from the eaves up to a point 24 inches inside the interior wall line of the building. 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.

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.