# Calculate Area Of A Roof?

When it is time to replace the roof, it is important to know how much material is needed. It is fairly easy to calculate the area of a roof by knowing a few measurements. The area of the roof is similar to determining the area of a square or rectangle. You need to know the length and width of the roof area, but you also need to know the roof height, or slope. If you have different sections of roof, each area should be calculated separately. Once the area is determined, you need to calculate the materials needed. It is advisable to buy additional materials to allow for damaged pieces or errors in cutting.
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