Low Pitch Roof Rafters

Many roofing shingles do not allow applications onto roofs at this pitch.

Low pitch roof rafters.

This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. More commonly roll on membranes such that use heat to bond seams together is used as a roofing material. It is always better to have a large rafter rather than be concerned with a sagging roof. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. This horizontal load or thrust can be considerable especially on a low pitched roof.

A low pitched roof is anything that is any roof with a pitch of 3 12 or less. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.