How To Estimate Roof Pitch

Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.

How to estimate roof pitch.

While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. Divide the slope by two to get the pitch. On the roof hold the level perfectly level and measure the height from the roof to the level 12 inches away from where the level touches the surface this will be the rise. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

If you do need to calculate the pitch an estimate or shortcut is usually more practical than measuring the roof s overall dimensions. As such while it can be cumbersome measuring the area and pitch of each part of the roof and multiplying by the corresponding correction factor will result in the most accurate estimate of necessary. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Roof pitch roof pitch refers to the amount of rise a roof has compared to the horizontal measurement of the roof called the run.

Here s an easy safe way to determine the pitch from inside your attic. Here are a couple examples. Pitch rise run 1 5 6 25. To see how pitch impacts the look of a garage and changes cost click the design center button on our pole barn kits page.

Measure the rise of your roof. To accurately calculate the area of your roof you must first determine its slope or pitch. Use the following formula which also describes a right triangle. One method to find the pitch is to climb on the roof and measure the rise for a 12 run.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Roof pitch calculator results explained slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run. For a simple gable roof the span wall to wall will be twice the size of the run wall to ridge horizontally.

Use our roof pitch calculator to find the pitch of your roof. A 12 in 12 pitch is a steep 45 degree angle roof. Let s say it is equal to 1 5 m. This is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares.

For example a 4 12 pitch roof that is 100 square feet. See the image below for more explanation on rise run and pitch. Rafter rise run this formula is from the pythagorean theorem. You can also calculate roof pitch even without using a roof slope calculator.

Calculate the roof pitch as the proportion of rise and run. First measure 12 inches from one end of the level and make a mark. Rafter rise run 1 5 6 2 25 36 38 25rafter 38 25 6 18 m. The pitch of the roof is the rise over a 12 inch run.