2 12 Roof Pitch Single Slope

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.

2 12 roof pitch single slope.

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. Angle the angle of a roof is the same as the roof s slope except instead of being. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks.

Pitches above 9 12 are very highly angled and are designated steep slope roofs. Most roof s have a pitch in the 4 12 to 9 12 range. These roofs have a pitch less than 4 12. Roof pitch calculator results explained.

Minimum roof slope roof pitch r905 2 2. Asphalt shingles can only be installed on roof slopes of 2 12 or greater. That means the roofing material you choose needs to protect the materials underneath to prevent water damage and leaks. It can be argued that the minimum roof slope for drainage is 1 0 since this is sufficient to allow.

However roof pitch is technically measured and defined differently. The recommended minimum roof pitch for shingles is 2 12 or simply two units of vertical rise to every twelve units of horizontal span. Pitch is the term used to describe the angle slope or slant of your roof. 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.

Low pitched roofs aren t able to shed water and snow as easily. Roof pitch defined and explained. A 2 12 roof slope is considered low so the roofing materials you would use on a steeper roof may not work. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.

Flat roofs which aren t perfectly flat require a small slope to allow for water runoff. Note that roof pitch is sometimes used in parallel with roof slope. 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. This is why there can never be one single minimum pitch which will work for all roof types.

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. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

I e 4 inches of rise per 12 inches one foot of run. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. If this isn t practical then perform the same measurement on the underside of. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.