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.

If you have a simple gable roof you ll only need to measure and sum up the 2 planes of the 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. 1 measure your roof with a tape measure go corner to corner and measure ground dimensions of your home. 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.

This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. 1 roof square 100 square feet. 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. Add the price per square of materials to get an estimated material cost.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. The roof shingle calculator is a free estimator that serves a useful purpose during any roof repair or replacement project. Find the square footage of the roof. The length l times the height h of a triangle is twice its area a2.

Calculate the size of your roof and estimate how many bundles of asphalt shingles rolls of felt and squares of roofing material are needed for a new roof. If you have multiple sections of roof find the area of each and add them together to find the total area. Dimensions measured from the ground. If overhangs are 6 add 1 foot to each side.

This gives us a 3d roof area of 1 625 sq ft. Calculating an area of a triangle when estimating a roof. 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.