A light switch is the simplest of electrical devices. Flip the switch, electricity flows. Flip it again, electricity stops. Lights on, lights off. That’s great for a small room with one entrance.

Q: Tim, I’ve got a mess on my brick home. I live in Houston, Texas, and have a sprinkler system for my lawn. The water sometimes gets sprayed on my brick exterior. White stains appear. I’ve tried ...

Q: Tim, I need you to mediate a dispute between my husband and me. We're building a new home, and there are several places where two or more switches can be used to control lights. I like the ...

Smart switches are great, but you can’t just drop any old thing into a three-way switch that turns a light on and off from two different locations. Today, Amazon is selling TP-Link’s Kasa Smart ...