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.

Formula for estimating roof replacement.

Installation would be 1 64 per sq ft. 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. This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. This gives us a 3d roof area of 1 625 sq ft.

If you have multiple sections of roof find the area of each and add them together to find the total area. Find the square footage of the roof. For gables and 1 76 per sq ft. 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.

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. Calculating an area of a triangle when estimating a roof. All pricing information on this page is based on average industry costs and is subject to variance for project specific materials labor rates and requirements. This is because a steep sloped roof requires a taller chimney and more lumber for framing.

Roofing cost can vary widely depending on the size and complexity of your roof type of materials you use as well as your location. 1 roof square 100 square feet. The average roof replacement cost is 4 200 6 600 on a 1 600 sq ft. However the end result may be well worth it as your roofing material is estimated to last up to 50 longer and will require less maintenance.

A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof. 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. If it has overhangs add them to your sizes. Ranch house using asphalt roof shingles.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. 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. The exact same materials and accessories will cost you about 114 124 per square on a gable roof and 127 138 per square for a hip roof.

If overhangs are 6 add 1 foot to each side. If you re estimating materials for your roofing project you can use our roofing calculator to estimate the number of squares you ll need or use our roof pitch calculator to find the pitch. The length l times the height h of a triangle is twice its area a2.