Standard Hip Roof Pitch

Selecting the roof pitch.

Standard hip roof pitch.

How do you calculate the slope of a roof. The most daunting task is selecting the height. 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. The most common hip roof pitch ratios fall between 4 12 and 6 12 although variations occur based on factors such as snow rain and wind conditions which is because steeper hip roof pitch ratios allow for less accumulations of snow and rain on the roof and lower ratios provide less wind resistance.

Modern residential hip roof construction uses common pitch ratios in general. Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. A hip roof design refers to a roof where the roof sides slope downwards from a middle peak with the rafter ends meeting the exterior walls of the house. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

The tall steep roofs are high priced and construct of those are complicated. A common range is given from 1 12 to 4 12 whereas conventional dimensions vary from 4 12 to 9 12 but the steep roofing technique follows slope above 9 12 with additional fasteners. I had a gable before with a solid ring beam before irma. Each of the four sides of the roof slope downward there are no upright or vertical parts no gables etc on a hip roof.

The most commonly used roof pitches fall in a range between 4 12 and 9 12. As aforementioned there is no standard pitch of a roof. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The height and rake of a roof are one of the important factors.

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. Pitches above 9 12 are very highly angled and are designated steep slope roofs. This is for the top level of a 3 story building that is 26 by 64. What is the best pitch for rebuilding a post irma hip roof.

One engineer recommends a 12 12 pitch for the new roof while another recommends a 7 12 pitch. You write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. Most roof s have a pitch in the 4 12 to 9 12 range. Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.

The typical roof slope follows specific materials and design techniques to ensure perfect safety from leakage.