How to Estimate Metal Roofing
Metal roofing has grown to be one of the most popular roofing materials. This is most likely due to its low cost compared with other roofing materials, and its wide range of colors and styles. This wide range of styles results in an equally wide range of cost. Roof estimating may seem like an intimidating task at first, but with the proper instructions, and tools as simple as a calculator, just about anyone can perform an estimation in hours. Does this Spark an idea?
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Instructions
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1
Measure the length of the roof surface (side to side) and the width (eave to ridge) and multiply to find the square footage. If your roof has a shape other than rectangular (like on a hip type roof), break the roof into sections that can be easily calculated and added later.
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2
Repeat Step 1 on all remaining roof surfaces to be covered with metal roofing, then add your calculations to find the total amount of the roof's square footage.
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3
Find the area of the individual roofing panels you are going to use--multiply the panel length by its width.
Example: A roof panel that measures 2 by 8 feet, has an area of 16 square feet.
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4
Divide the total square footage of the roof by the square footage of the roofing panel; this product will be the amount of roofing panels that will be needed to cover the roof. If this number has a decimal, round up to the nearest whole number/panel.
Example: Using the example panel from Step 3 (area of 16 square feet), and an example roof face that measures 20 by 40 feet (area of 800 square feet). Divide the roof surface of 800 square feet by the panel of 16 square feet to find that you will need 50 panels.
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Multiply the amount of panels needed by their unit cost to find the total cost of metal roofing panels.
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Tips & Warnings
Adding 10 percent to 15 percent to the amount of panels will account for any wasted material during the construction process.
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Comments
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This is fine when setting the panels edge-to edge, but how do you estimate when the panels are overlapping say two or three inches on each side and top and bottom?
