15 Degree Pitched Roof Construction

The pitch of a roof is the rise the vertical angle of the roof over the run the horizontal measurement.

15 degree pitched roof construction.

A low pitched roof would be 2 12 and it means that over the space of 12 inches the roof only rises two inches. Pitched roofs begin with with slopes greater than 3 in 12. They have a pitch ranging from 4 12 to 9 12. However if you to do the process using your own knowledge you can still convert pitch to degrees by dividing the rise and run and get its corresponding measurement.

The table below shows common roof pitches and the equivalent grade degrees and radians for each. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Conventional roofs are the easiest to construct and you can walk on them safely. 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.

The 45 degree roofs seen on a frame houses are 12 in 12 but roofs can be even steeper consider the mansard roofs introduced by french second empire architects in the middle of the 1800s. Suitable materials for pitched roofs. High pitched roofs often need extra fasteners and their pitch can be as high as 21 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.

You can also calculate roof pitch even without using a roof slope calculator. Robin is working on an extension so we thought we d shadow him for the day and see how he creates a pitched roof or semi pitched roof leading up to a flat. 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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 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. These roofs have a pitch less than 4 12. What is the standard pitch for a roof. 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.

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.