20 Degree Roof Pitch

11 august 2015 traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15.

20 degree roof pitch. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Directly measure roof pitch angle and calculate pitch and angle on phone or tablet. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. Set bevel gauge directly from phone or tablet screen.

Visit this page on your phone to directly measure pitch and angles. 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. But with the use of a roof pitch in degrees converter you will be able to get the correct measurement. Divide the first part of the ratio by 12 to work out the pitch.

Find the inverse tangent of the pitch to find the angle in degrees. 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. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree. Lower slopes don t handle wind driven rain as well.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. What degree angle is a 12 12 pitch roof. A 12 12 pitch roof has a pitch angle of 45. With the use of this converter it will be easier for you to locate a 30 degree roof pitch 20 degree roof pitch 25 degree roof pitch or a 15 degree roof pitch.

Steeper slopes increase the sail effect that makes them susceptible to wind. It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. To convert between american roofing ratios and pitch degrees follow these steps. A 30 degree roof slope 7 12 pitch is the right pitch to aerodynamically handle high wind.

Roof angles and rafter plumb cuts. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Tap the button to start measuring and lay your device on an. 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.

This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees.