Pitch Of A Roof Using The Slope

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible.

Pitch of a roof using the slope. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. A a roof with a 6 rise for every 12 run has a 6 per foot or 6 in 12 pitch. So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12. Roof pitch refers to the slope which the rafter creates.

Often you express roof pitch as the ratio between the rise and the run in the form of x 12. Roof pitch is a measurement of a roof s slope expressed as a ratio. How to obtain roof pitch or slope by using the rafter tables on a framing square measuring the roof slope pitch or rise and run is easy if you ve got a tape measure and more accurate still if you ve also got a level on hand. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Still they can get away with a minimum pitch of only 12 inches to 1 12 inches with proper drainage techniques. Flat that may actually be a misnomer because no roof is completely flat since they need to have a slight angle to enable rainwater to drain off the roof. 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. Pitch is the incline of the roof expressed as a fraction derived by dividing the rise by the span where the roof span is the distance between the outside of one wall s top plate to another.

Although there is no single standard roof pitch used on all sloped roofs factors such as roofing materials and local climate help to determine the appropriate range of pitches for a given building. 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. Categories describing roof pitch are loosely defined by the slope. The way pitch also known as roof slope is measured is rise over run.

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. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. 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. But did you know that simple data already printed on your framing square can give key roof slope and rafter data.