Roof Pitch For Shingles

Manufacturers of asphalt shingles recommend a pitch of 4 12 or more but the absolute minimum pitch is 2 12.

Roof pitch for shingles. Asphalt shingle roofing is designed to shed water that is flowing downward over its surface with each shingle overlapping the one below. We do install shingles on these in between pitches but special application measures must be taken in this middle ground. What is the minimum slope for an asphalt shingle roof. So a 4 12 pitch roof rises 4 inches for every 12 inches of horizontal run.

Although ceramic tile roofs are expensive they can have a life span of over 100 years. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years. A pitch of 2 12 is the minimum pitch for shingles made of asphalt so your roof just barely makes the cut off for one of the most popular roofing material options. It is often compared to slope but is not exactly the same.

The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. These shingles are appropriate for pitches as low as 4 12 pitch all the way up to a 12 12 pitch. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.

However it is regrettable that many installers usually ignore this requirement due to the desire for a quick installation process. In the roofing trade the go to term is pitch and it is expressed in terms of 12 inches so the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. 5 12 to 12 12 pitch.

For example a 4 12 pitch roof that is 100 square feet. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above. If 4 12 and above is normal and 2 12 is minimum what about properties with roofs in between the two such as a 3 12 pitched roof. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Low sloped roof shingle installation. Think of them as taking the middle road in terms of roof pitch not too flat not too steep. They provide excellent weather resistance great value and now more than ever a tremendous range of beautiful designs and color blends. The pitch of the roof is the rise over a 12 inch run.

Pitch is measured in inches of vertical rise of the roof over one foot 12 inches of horizontal run.