As home ages, some defects unavoidable

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Over time, many homes develop little nonstructural problem areas that need to be dealt with, and it seems like the older the house, the more of those little problems that occur. Here's some advice on fixing a few of the more common door and trim situations you might typically encounter. Out-of-square corners If you've tried installing trim in a corner and can't get the miter joint to come out right, it's probably because the corner is out of square -- meaning that it's not an exact 90 degrees. To rectify the problem, you need to get an exact measurement on the angle of the corner, then adjust your miter joints to compensate. The easiest way to do this is with an adjustable bevel gauge, which can be purchased inexpensively at any hardware store or home center. The bevel gauge has a wood or plastic handle with a metal blade that's held in place with a wing nut. To use the tool, simply loosen the wing nut and place the handle in the corner against one of the walls. Move the bla...