Q. I think I have efflorescence on the concrete walls of my basement. My house is 90 years old with a poured-concrete foundation. The surface is blistering and peeling, and I see small white ...

Q: My indoor patio was stained green with oil-based paint 68 years ago. I put on two coats of Valspar floor, deck and patio for concrete, but it's peeling. What do I do? A: Your question raises a ...