Formula For Estimating Roof Replacement

If overhangs are 2 feet on front an back and there are no overhangs on the sides add 4 feet to the appropriate side.

Formula for estimating roof replacement. The length l times the height h of a triangle is twice its area a2. Add the price per square of materials to get an estimated material cost. Find the area of a roof multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet. The roof shingle calculator is a free estimator that serves a useful purpose during any roof repair or replacement project.

If it has overhangs add them to your sizes. 1 measure your roof with a tape measure go corner to corner and measure ground dimensions of your home. For estimating purposes we also assume that there is a chimney a couple of dormers and two layers of old shingles that need to be torn off and removed before a new roof can be installed. Dimensions measured from the ground.

Find the square footage of the roof. This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. Calculating an area of a triangle when estimating a roof. Once you enter the basic roof dimensions and enter the type of roof you will get a very accurate result telling you exactly the amount of shingles that are required to cover your new roof.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Assuming this is a hip roof we multiply this by 1 1 which gives us roughly 18 squares or 1 800 square feet of the roof surface. Measure the length and width of each portion of the roof multiply length by width for each plane and then add the planes together for the total square footage. If overhangs are 6 add 1 foot to each side.

Explore a number of housing related calculators as well as hundreds of other calculators covering topics such as finance math health fitness and more. This gives us a 3d roof area of 1 625 sq ft. 1 roof square 100 square feet.