Measuring Roof Pitch

Measure from the attic.

Measuring roof pitch.

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. Measure from the roof. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. For more complex roofs you may need to calculate it section by.

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. How to calculate the pitch of a roof method one. One method to find the pitch is to climb on the roof and measure the rise for a 12.

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. If the pitch is 1 3 the slope is 8 12. For a roof with the ridge above one wall the span is the same as the run. Slope minimums for various roof coverings.

Using ruler and tape you can do it anyway of these ways. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally. First measure 12 inches from one end of the level and make a mark. Remember slope is expressed as a ratio and in inches per foot.

Another method to find the roof pitch is to go into the attic and measure the rise. On a ladder at the walled part of the pitched roof place the level against the roof overhang rafter with the 12 inch.