Low Pitched Shingle Roof Installation

The acceptable underlayment installation options for low slopes are described in the canadian standards association asphalt shingle application standard csa a123 51 as follows.

Low pitched shingle roof installation.

It not only protects the roof but it also protects the fascia. For a low slope residential roof there are two main options. As well a slope of 4 12 is most commonly considered the lowest slope for standard shingle installations. Drip edge or drip cap is either plastic or sheet metal.

The cabo one and two family dwelling code permits the installation of asphalt shingles on roofs with a slope as low as 2 12 if the shingles are double coverage self sealing versions. Traditional 3 tab shingles made with asphalt composite are the most popular type of shingle and are the most flexible in terms of adapting to many roof pitches. Shingles that are not self sealing must be hand sealed with asphalt roofing cement. These shingles are appropriate for pitches as low as 4 12 pitch all the way up to a 12 12 pitch.

1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. The roofing materials most often used for these pitches include asphalt composite shingles. Gaf asphalt shingles combined with the proper underlayment make ideal low slope roof shingles that do an excellent job of preventing water build up and leaking. However low slope installation means we take everything from job site safety and panel seaming to water and ice shield into consideration.

Install roll roofing when the temperature is at least 50 degrees fahrenheit to keep the material from cracking. Install peel and stick roofing in a similar manner. 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. I have to say having a low roof slope sure makes it more comfortable to install the shingles.

Cover the entire low sloped roof area with a self adhered modified bituminous membrane that will act as an ice and water. What are gaf asphalt shingles. Then apply standard asphalt shingles over the membrane. A corresponding editor paul fisette replies.

That way water flows from the shingles onto the flange and continuing to flow down slope it flows back on the shingles.