Dear James: Our swinging doors use a lot of wall space when open. Our house is small, so we want to install sliding or folding doors. Which design is better and how are they installed? - Marcia L.

I wanted an inexpensive screen door sans banging, clanging and slamming, able to keep bugs out but allow dogs and cats in and out, and foolproof, so that forgetful guests don't bounce off it. I'd ...