Formula For Estimating Roof Replacement

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.

Formula for estimating roof replacement.

The average roof replacement cost is 4 200 6 600 on a 1 600 sq ft. 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. 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. 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. This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof. For a hip type roof.

If it has overhangs add them to your sizes. 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 you have a simple gable roof you ll only need to measure and sum up the 2 planes of the roof. If overhangs are 2 feet on front an back and there are no overhangs on the sides add 4 feet to the appropriate side.

Find the square footage of the roof. Roofing cost can vary widely depending on the size and complexity of your roof type of materials you use as well as your location. 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. 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 is because a steep sloped roof requires a taller chimney and more lumber for framing. Calculating an area of a triangle when estimating a roof. 1 measure your roof with a tape measure go corner to corner and measure ground dimensions of your home. Installation would be 1 64 per sq ft.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Ranch house using asphalt roof shingles. 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. 1 roof square 100 square feet.

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. This gives us a 3d roof area of 1 625 sq ft.