For a hip type roof.
Formula for estimating roof replacement.
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.
Roofing cost can vary widely depending on the size and complexity of your roof type of materials you use as well as your location.
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.
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.
Installation would be 1 64 per sq ft.
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The length l times the height h of a triangle is twice its area a2.
Calculating an area of a triangle when estimating a roof.
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.
The average roof replacement cost is 4 200 6 600 on a 1 600 sq ft.
This gives us a 3d roof area of 1 625 sq ft.
1 roof square 100 square feet.
Ranch house using asphalt roof shingles.
A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof.
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.
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.
If you have multiple sections of roof find the area of each and add them together to find the total area.
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.
If overhangs are 2 feet on front an back and there are no overhangs on the sides add 4 feet to the appropriate side.
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.
Find the square footage of the roof.
If overhangs are 6 add 1 foot to each side.
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.
For gables and 1 76 per sq ft.
If it has overhangs add them to your sizes.
This is because a steep sloped roof requires a taller chimney and more lumber for framing.
