Roof Slope For Shingles 2 12

The roof pitch between 2 12 and 4 12 is considered as a low pitch roof so shingles can be installed in the roof slope between 2 12 and 4 12.

Roof slope for shingles 2 12.

This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Or the colon can replace the slash as in 2 12 or 7 12. 9 46 built up roof asphalt. Minimum required roof slope for roofing materials.

Roofing material or system. In flat roof slope homeowner needs to find ways to ensure that water will be able to run down. Also if asphalt shingles are installed on a roof slope of 2 12 to 4 12 it shall be provided with a double underlayment application. The short simple answer is 2 12 has traditionally been considered the absolute minimum acceptable roof slope suitable for asphalt shingles.

What is the minimum slope for an asphalt shingle roof. The measurement of flat roof slope varying from 0 12 inches to 2 12 inches. Considering the roof slope requirement is important. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

However asphalt shingle roofing should fulfill minimum roof slope for shingles because it is impossible to install the shingle at an angle flatter than that. The slope of a roof often referred to as the pitch is determined by rise over run the roof s vertical rise in inches for every twelve inches of horizontal length the run. 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. So a roof with four inches of rise every 12 inches horizontally run would have a slope of 4 12 sometimes displayed as 4 12.

Minimum required slope x in 12 minimum required slope degrees asphalt shingles. Pitch is the term used to describe the angle slope or slant of your roof. Resilient asphalt shingles lie much flatter to the substrate than slate tile and concrete which keeps water from being easily blown under them. Roof pitch designations are comprised of two numbers indicating a ratio.

Clay and concrete tile. In 12 0 25 in 12 1 19 built up roof coal tar pitch. For example if it is a very low slope water including snowmelt or. With respect to shingle application roof slopes from 2 12 to less than 4 12 18 5 are called low slope roofs while roof slopes of 4 12 or greater are called normal or standard slopes.

Because of the non absorbent nature of asphalt the shingles themselves provide an element of waterproofing which is why they work well for low slopes. Asphalt shingles should never be applied to roof slopes below 2 12 2 of vertical rise for every 12 of horizontal run or 9 5. Why is 2 12 the minimum. When combined with the proper underlayment materials and application they are an excellent solution for a low slope roof with a pitch between 2 12 to 4 12.

Asphalt shingles continue to be the most widely installed roof covering option in north america.