Roof Slope And Pitch

Roof pitch calculator results explained slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run.

Roof slope and pitch.

Steep slope roofs are more common in certain climates in europe and occasionally in the mountainous areas of the sierras. The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow. If the pitch is 1 3 the slope is 8 12. Remember slope is expressed as a ratio and in inches per foot.

Squaring building lines example 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. If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Roofers express roof slope as rise or pitch measured in inches of vertical rise per foot of horizontal distance or run. 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.

By knowing the pitch of your roof you will know what type of products can be used and the best ways to go about applying them. Pitch is thus the ratio of the rise in inches to a 12 inch run and is often expressed using a semicolon for example 6 12. Understanding your roof s pitch and slope. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

The pitch of the roof pertains more to the actual construction of the house whereas the slope is more relevant to the roofing of your house. Roof pitch refers to the slope which the rafter creates. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. If the slope is 4 12 the pitch for the 24 foot span is 1 6.

Low slope roofs are from 0 to 3 12 in pitch. Some sources consider low slope to include 3 12 pitch roofs. See low slope roofing. And pitch is a fraction derived by dividing the rise by the entire span.

A steep slope is any pitch above 9 12. So a 3 inch rise roof also described as a 3 in 12 roof means that for every 12 or foot of horizontal distance the height of the roof increases by 3. For example a roof with a pitch of 2 12 3 12 will work best with 3 tab shingles the roofing most commonly found on homes in jacksonville. Slope minimums for various roof coverings.

Extremely sloped roofs with a pitch of 12 12 or 45 degrees are rare but not unheard of in both the mountains and the flatlands.