The Slope Of A Roof Is

However most often a ratio of pitch also fraction is slang used for the more useful slope of rise over run of just one side half the span of a dual pitched roof.

The slope of a roof is.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Roof pitch in layman s language simply refers to the steepness of the roof. 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. 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.

Slope is the incline of the roof expressed as a ratio of the vertical rise to the horizontal run where the run is some portion of the span. X rise 12 run this means that for ever 12 inches horizontally the roof rises x number of inches. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. There are different kinds of roofs and all these have particular specifications for their installation.

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. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. 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.

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 slope of the roof is determined by the vertical rise in inches for every horizontal 12 inch length or run a common formula is. Often you express roof pitch as the ratio between the rise and the run in the form of x 12. The pitch of a roof is its vertical rise over its horizontal span.

This ratio is always expressed as inches per foot.