Roof Pitch Vs Slope

Slope minimums for various roof coverings.

Roof pitch vs slope.

If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. The slope ratio represents a certain amount of vertical rise for every 12 inches of horizontal run. If the pitch is 1 3 the slope is 8 12. March 18 2019by american roofing.

Roof pitch can be a health and safety issue on homes in geographic areas that experience heavy snow and rain. Pitch and slope do not mean the same thing. 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. Slope is the ratio measured in inches per foot.

Because slope affects how water is shed from a roof surface and determines the limits for using asphalt shingles understanding how to measure the slope of a roof may be valuable to a home inspector. This can be very effective for certain ranch styles porch rooftops or modern geometric rooftops. A steep slope to a roof makes it more difficult for wet snow to accumulate and put undue stress on your roof. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.

And pitch is a fraction derived by dividing the rise by the entire span. If the slope is 4 12 the pitch for the 24 foot span is 1 6. Plus since the low pitch requires fewer materials and less work than the steep pitch it comes at a lower cost. Remember slope is expressed as a ratio and in inches per foot.

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.