Minimum Pitch For Cedar Shingle Roof

Run in degrees and as percentage the minimum roof slope allowed by code for any type of roof is in 12 applicable only to coal tar pitch roof systems.

Minimum pitch for cedar shingle roof.

The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. The minimum roof pitch for shingles and shakes is 14 degrees. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Roof slope equivalents as rise.

Asphalt shingles minimum roof slope roof pitch r905 2 2. One of the many advantages of using cedar shingles is that they can be used on roof pitches as low as 14 degrees. Minimum roof pitch for shingles it is important for shingle roofs to function properly and one method of ensuring that this is achieved is to observe the pitch requirements for the shingles. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span.

You are required to have a double layer of asphalt saturated felt paper or a single layer of ice water shield under your. Low sloped roof shingle installation. Wood shingles are more susceptible to leaks than composite or asphalt shingles because they don t lock as tightly or lay as flat as traditional shingles. Asphalt shingles continue to be the most widely installed roof covering option in north america.

Complete list of roofing types. You could also opt for a pvc flat roofing membrane. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. Normal shingle installation is allowed for all roofs with a pitch of 4 12 and above.

So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. Our wooden shakes are the premier no. To achieve a sound watertight roof the gauge of the shingle assuming the standard 5x or 400mm shingle must be closed to 95mm giving a 4 ply roof. At these pitches there is a possibility of some water penetration.

At these low pitches 14 22 degrees care must be taken and a water impermeable vapour permeable underlay must be used underneath with a ventilated space between the membrane and the shingles. There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12. The shingles are 4 10 to 1 2 in thickness and wood shingles are installed with a 5 exposure 16 shingle length 5 1 2 exposure 18 shingle length or 7 1 2 exposure 24 wood shingle length. Degrees to pitch rise in run table.

While a low pitch roof may not show the aesthetic qualities of cedar shingles to full advantage they provide a lightweight durable solution where a pitched roof is required. Roof pitch multiplier table. 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. We do install shingles on these in between pitches but special application measures must be taken in this middle ground.