Measuring Roof Pitch

Slope minimums for various roof coverings.

Measuring roof pitch.

If the slope is 4 12 the pitch for the 24 foot span is 1 6. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. How to calculate the pitch of a roof method one. If the pitch is 1 3 the slope is 8 12.

Using ruler and tape you can do it anyway of these ways. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. Placing a ladder near the roof you will put a level a foot or so up on the roof hold it level and measure from the.

Another method to find the roof pitch is to go into the attic and measure the rise. The slope is the same as the pitch. First measure 12 inches from one end of the level and make a mark. For more complex roofs you may need to calculate it section by.

Remember slope is expressed as a ratio and in inches per foot. And pitch is a fraction derived by dividing the rise by the entire span. On a ladder at the walled part of the pitched roof place the level against the roof overhang rafter with the 12 inch. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

For a roof with the ridge above one wall the span is the same as the run. Measure from the attic.