2 12 Roof Pitch Single Slope

Roof pitch designations are comprised of two numbers indicating a ratio.

2 12 roof pitch single slope.

Roof pitch defined and explained. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. That means the roofing material you choose needs to protect the materials underneath to prevent water damage and leaks.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. It can be argued that the minimum roof slope for drainage is 1 0 since this is sufficient to allow. Angle the angle of a roof is the same as the roof s slope except instead of being. However roof pitch is technically measured and defined differently.

Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled. These roofs have a pitch less than 4 12. I e 4 inches of rise per 12 inches one foot of run. Asphalt shingles can only be installed on roof slopes of 2 12 or greater.

Note that roof pitch is sometimes used in parallel with roof slope. Minimum roof slope roof pitch r905 2 2. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. A 2 12 roof slope is considered low so the roofing materials you would use on a steeper roof may not work.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. Or the colon can replace the slash as in 2 12 or 7 12. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

The most commonly used roof pitches fall in a range between 4 12 and 9 12. This is why there can never be one single minimum pitch which will work for all roof types. Most roof s have a pitch in the 4 12 to 9 12 range. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

Roof pitch calculator results explained. Low pitched roofs aren t able to shed water and snow as easily. If this isn t practical then perform the same measurement on the underside of. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. This means for every 12 horizontal units the roof must rise a minimum of 2 vertical units. Pitch is the term used to describe the angle slope or slant of your roof.