Yes, you can sand a floor too much, especially when it comes to engineered wood flooring. These floors have a thin top layer of hardwood, which typically allows for only one or two sandings before the lower layers are exposed—leading to irreparable damage. Even with solid wood floors, repeated sanding reduces the thickness over time, potentially shortening the floor’s lifespan. It’s essential to sand only when necessary and to use the proper grit and equipment to avoid unnecessary wear.