Minimum Slope For Cedar Shingle Roof

Wood shingles minimum roof slope roof pitch r905 7 2.

Minimum slope for cedar shingle roof.

According to this code the minimum slope for asphalt shingles is 17 degrees or two vertical units to twelve units in the horizontal. Slate shingles minimum roof slope roof pitch r905 6 2. 18 43 asphalt shingles with special underlayment requirements 2 in 12. If your home features a low slope roof you can still install the cedar roof of your dreams.

A shingle roof like this north dallas garage in the photo above may have a failure no matter how good a job the installer did. Depending on the roof profile there are minimum roof slope requirements. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles. This roof gives me confidence.

This means for every 12 horizontal units the roof must rise a minimum of 4 vertical units. The minimum slope for standing seam of roof systems shall be one quarter unit vertical in 12 units horizontal 2 percent slope. Slate shingles can only be installed on roof slopes of 4 12 or greater 33 slope. Slope and exposure tables for wood shake shingle roofs click to enlarge any image as discussed in best roofing practices recommended exposures for shakes and shingles on roofs are shown in tables 2 13 and 2 14.

Shingles of all types need to have a slope to function properly. The 2 12 number is rise over run or two units of vertical for every 12 units horizontal. The minimum slope for lapped non soldered seam metal roofs with applied lap sealant shall be one half unit vertical in 12 units horizontal 4 percent slope. That works out to about nine degrees if that works better for you.

High and low pitch examples. Roofing material or system. Minimum required slope x in 12 minimum required slope degrees asphalt shingles. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle.

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. In 12 0 25 in 12 1 19 built up roof coal tar pitch. If you desire a cedar roof for your home the ideal pitch for your roof ranges from a five pitch to a 12 pitch. For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep.

The davinci composite shake is the best possible option i could find for staying as close to real wood on our roof. Minimum pitch for cedar roofs. The minimum recommended slope for standard installation of shingles is 3 12 and 4 12 for shakes. On lower slopes shingles or shakes may be installed over a fully waterproof built up roof bur or membrane roof.

The same can also be the case when the tiled roof has a reduced exposure. The requirements for an asphalt shingles roof are contained in the international building code. This minimum slope requirement can be found in the installation instructions for almost every manufacturer and. 9 46 built up roof asphalt.

Lap sealants shall be applied in accordance with the approved manufacturer s installation instructions. For every 12 horizontal feet the roof changes 8 feet in vertical height. Minimum slope for asphalt shingles. Asphalt shingles continue to be the most widely installed roof covering option in north america.

As much as i love wood i no longer have to worry about maintaining a real cedar shake roof.