Roof Estimating Formulas

You can also calculate roof pitch even without using a roof slope calculator.

Roof estimating formulas.

Roof pitch roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. Medium low slope roof pitch of 3 or 4. Otherwise use the table or diagram below. However if you use premium materials such as metal wood shingles clay tile etc the cost of your roof will be at least 9 500 16 000.

Roofing cost can vary widely depending on the size and complexity of your roof type of materials you use as well as your location. Steep slope roof pitch of 12 or 45 degrees. To accurately calculate the area of your roof you must first determine its slope or pitch. Medium slope roof pitch of 6.

Here are the equations you may use to solve for the length of the slope and the rafter. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. 1 roof square 100 square feet. The length l times the height h of a triangle is twice its area a2.

Medium steep slope roof pitch of 9. 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. It is often compared to slope but is not exactly the same. So if you divide your answer of a product of length times height by two you will get the area of a triangle.

Use the following formula which also describes a right triangle. The average roof replacement cost is 4 200 6 600 on a 1 600 sq ft. Ranch house using asphalt roof shingles. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.