Understanding Roof Pitches

Pitch compares the roof s span to the rise while slope compares rise and run.

Understanding roof pitches.

To calculate pitch you simply divide rise by span and display your result as a fraction. Low pitch roofs are safer and easier to access when maintenance. And pitch is a fraction derived by dividing the rise by the entire span. 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.

If the pitch is 1 3 the slope is 8 12. The roof pitching is essentially how steep the roof is going to be they are either going to be flat or pitched. Roof pitch is indicated by the measure of vertical ascent they ensure for each twelve creeps of horizontal estimation. This implies a rooftop that is 4 inches higher than it was 12 creeps back assessing on a flat plane is a four and twelve rooftop.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. You ll often hear experts express pitch as x over y. For example if a roof is 8 feet high and spreads out from the center covering 12 feet in each direction the rise over the run would be 8 12. First measure 12 inches from one end of the level and make a mark.

Roof pitch is the rise of the roof over the run of the roof. Visualizing pitch consider a right triangle. Especially for homes in the south a low pitch roof. The bottom horizontal line of the triangle is the base of the roof.

The lower pitch of the roof means greater walkability. If the slope is 4 12 the pitch for the 24 foot span is 1 6. Roof pitch is what roofers call the angle of the roof relative to a horizontal line. Pitch is further defined as rise over run.

Remember slope is expressed as a ratio and in inches per foot. In this instance we want to take a look at how this can be changed and improved with the help of a roof pitch chart. It can be measured in degrees or what is known as pitch. A roof that ascents six inches each twelve level inches is depicted as a 6 and 12 roof.

Mathematically the pitch of a roof is different calculation than roof slope. A roof that rises 4 inches vertically for every 12 inches horizontally is said to have a 4 12 pitch.