If you think about it, a house has only two moving parts, doors and windows. Doors get the most use. Some, like the entry door or the bathroom door, are opened and closed a number of times every day.

A few decades ago, you had two main choices of interior door: A hollow-core slab door in mahogany, or one in paint grade. My, how tastes change. Today, the molded six-panel Colonial door is king.