Q: I’m repairing a 1920s-era house in Southern Arizona. It has rock walls that are covered on the exterior with poured concrete and then covered with plaster on the inside of the house. There are a lot of hairline cracks in those plaster walls, but some of the cracks are 3/8ths of an inch wide. What should I use to fill the cracks and then what should I use as a top coat on the interior walls?
A:Â You can start by just troweling on elastomeric caulk into the cracks to fill them up. Then there are lots of other options for a topcoat. Two good possibilities are drywall mud or possibly acrylic stucco.
For more do-it-yourself tips, go to rosieonthehouse.com
