Low Slope Roof Asphalt Shingles

Some building codes allow as low as a 2 slope with asphalt shingles if additional steps are taken.

Low slope roof asphalt shingles.

Cover the entire low sloped roof area with a self adhered modified bituminous membrane that will act as an ice and water. The usual slope for asphalt shingles is a 4 or greater rise for every horizontal foot of run. Asphalt shingles continue to be the most widely installed roof covering option in north america. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

What is the minimum slope for an asphalt shingle roof. Shingles that are not self sealing must be hand sealed with asphalt roofing cement. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. 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.

Because of the non absorbent nature of asphalt the shingles themselves provide an element of waterproofing which is why they work well for low slopes. When combined with the proper underlayment materials and application they are an excellent solution for a low slope roof with a pitch between 2 12 to 4 12.