1 12 Slope Roof

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

1 12 slope roof.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Most roof s have a pitch in the 4 12 to 9 12 range. Simply put it s a shallow roof.

The exact roof slope in degrees is given by the arctangent. Metal roofing on 1 12 pitch the pitch is only 1 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. Definitions vary on when a roof is considered pitched.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. At 1 12 pitch you are right at the threshold where standing seam becomes impermissible i mean true standing seam with a rolled lock seam and soldered flat seams must be used. A soldered flat seam metal roof won t be cheap and must be done by an artisan but it lasts a very long time. If a roof rises 1 in a length of 12 this is 1 12 roof pitch.

Roof pitch defined and explained. Or the colon can replace the slash as in 2 12 or 7 12. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. Low slope roofs have gradients of 3 12 or less.

Roof slopes are identified using the gradient method described above where the rise varies but the run is usually 12. A very low pitch roof can also be done in metal. In some very steep roofs you may see the gradient inverted so that the run varies but the rise is held as 12. 1 12 roof pitch angle 4 76 degrees.

Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. 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. I have read some articles that state this type of metal will work fine and others that implicitly state not to use metal for such a low pitch. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important.