Roof Estimating Formulas

Medium slope roof pitch of 6.

Roof estimating formulas.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Ranch house using asphalt roof shingles. You can also calculate roof pitch even without using a roof slope calculator. To get the slope of your roof based on degrees roof rise or x inches per 12 run use our roof pitch calculator.

Steep slope roof pitch of 12 or 45 degrees. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Medium low slope roof pitch of 3 or 4. So if you divide your answer of a product of length times height by two you will get the area of a triangle.

Medium steep slope roof pitch of 9. Use the following formula which also describes a right triangle. Otherwise use the table or diagram below. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

Here are the equations you may use to solve for the length of the slope and the rafter. Roof pitch roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. 1 roof square 100 square feet. To accurately calculate the area of your roof you must first determine its slope or pitch.

It is often compared to slope but is not exactly the same. Rafter rise run this formula is from the pythagorean theorem. The average roof replacement cost is 4 200 6 600 on a 1 600 sq ft. The length l times the height h of a triangle is twice its area a2.