How to Calculate Window Trim
Using window trim attractively shows off a window as a primary feature of a structure, much like the frame around a picture. Windows can be bordered with a wide range of trim types, from basic wood boards and planks to intricately carved moldings. You can usually install the trim yourself for a low cost and with minimal effort, using common carpentry skills. Calculating how much molding you need for a window trimming project requires only basic tools, and lets you take the first step toward estimating the cost of your project. Does this Spark an idea?
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Instructions
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Measure the outside perimeter of one window with a tape measure. It's usually easiest to measure the height and width of the window, then multiply by 2, since the height and width are typically identical on both sides.
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Measure the perimeter of the remaining windows.
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Add the measurements of all the windows. Multiply the total by 1.2, to account for the possibility of 20 percent wasted material during cutting and installation.
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