Roof Slope And Pitch

Steep slope roofs are more common in certain climates in europe and occasionally in the mountainous areas of the sierras.

Roof slope and pitch.

If the pitch is 1 3 the slope is 8 12. See low slope roofing. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

A steep slope is any pitch above 9 12. Slope minimums for various roof coverings. Understanding your roof s pitch and slope. 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.

Some sources consider low slope to include 3 12 pitch roofs. 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. 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Roof pitch refers to the slope which the rafter creates. 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. If the slope is 4 12 the pitch for the 24 foot span is 1 6. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

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. Roofers express roof slope as rise or pitch measured in inches of vertical rise per foot of horizontal distance or run. 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. And pitch is a fraction derived by dividing the rise by the entire span.

Remember slope is expressed as a ratio and in inches per foot. 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. Low slope roofs are from 0 to 3 12 in pitch. 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.

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.