Depending on the type of flooring you are looking to put in, you may need to do different types of concrete surface preparation. If you are looking at putting a hardwood, tile, or laminate floor, then you need to make sure that the concrete is clean and smooth. The last thing you want is for your new flooring to not lay evenly or have bumps. You also don't want any gaps between the concrete and your new flooring. Making sure the concrete surface is smooth will help ensure a professional and long-lasting finish. Concrete surface preparation is an important first step that should never be overlooked.