Understanding Roof Pitches

A roof that rises 4 inches vertically for every 12 inches horizontally is said to have a 4 12 pitch.

Understanding roof pitches.

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. Roof pitch is indicated by the measure of vertical ascent they ensure for each twelve creeps of horizontal estimation. Mathematically the pitch of a roof is different calculation than roof slope. Pitch is further defined as rise over run.

Slope minimums for various roof coverings. Visualizing pitch consider a right triangle. A roof that ascents six inches each twelve level inches is depicted as a 6 and 12 roof. 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. Roof pitch is the rise of the roof over the run of the roof. You ll often hear experts express pitch as x over y. 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.

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. Low pitch roofs are safer and easier to access when maintenance. Remember slope is expressed as a ratio and in inches per foot.

Roof pitch is what roofers call the angle of the roof relative to a horizontal line. Pitch compares the roof s span to the rise while slope compares rise and run. The bottom horizontal line of the triangle is the base of the roof. Since a low pitch roof doesn t require as many shingles more often than not a low pitch roof will end up being more.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. First measure 12 inches from one end of the level and make a mark. If the slope is 4 12 the pitch for the 24 foot span is 1 6. And pitch is a fraction derived by dividing the rise by the entire span.

Especially for homes in the south a low pitch roof. 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.