Measuring Interior Dimensions
Source: Martha Stewart Living, May 2000
A homemade extending measuring stick is useful for determining interior dimensions, such as those of a window frame. It is particularly handy in dark or cramped areas that make reading a ruler difficult. You will need two thin strips of wood, each more than half the length of the space you are measuring, and a clip (such as a binder clip) to clamp them together. To take a measurement, extend the strips to the edges of the space, with the strips' ends overlapping at the center. Make sure that the pair form a straight line, and then clip the strips together. Use the resulting tool as a guide for measuring and cutting your materials.