18 Degree Roof Pitch

The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.

18 degree roof pitch.

Roof pitch refers to the slope which the rafter creates. The 12 inch run is considered standard in roof pitch or angle terminologies. Roof pitch and corresponding angles. This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof.

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. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. You can assess this in two ways either as the roof pitch angles which the rafters make with the horizontal or the proportion between the run and the rise of the roof. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope flat.

If you are looking at a roof plan for your home or business very rarely will it list the roof pitch in degrees instead it lists the rise and the run of the roof. Locate its tangent or tan and follow the left row for you to read its corresponding degree. 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. In most cases the angle of inclination is chosen in the range from 11 to 45 but other values are encountered.

Find all the needed factors in order to determine the pitch angle s degree. Main methods of calculating roof pitch calculation of the slope of the roof is an important part of the design process of its construction. So use the 12 inch level as a constant run and 18 inch ruler as a variable rise. For example a 7 12 roof pitch means that for ever 12 of horizontal distance the.

18 43 5 12 22 62 6 12 26 57 7 12 30 26 8 12 33 69 9 12 36 87 10 12 39 81 11 12 42 51 12 12 45 this is our pitch calculator which will convert pitch to angle or angle to pitch for half degree roof slope calculations. 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.