Q: My wife and I have an outdoor patio built with colored, precast-concrete paving blocks. It doesn't take long each year for black mold and mildew to start growing on it. We also have an issue with ...

If your concrete patio is worn out, badly stained, and weather-beaten, don’t despair. There’s a simple, affordable way to restore patios to like-new condition, and it’s no more difficult than painting ...