Just as a backyard patio provides an extra "room" in summer, the basement offers extra square footage in winter. Before heading underground, though, consider installing a new floor to make the space look and feel more finished. Note that certain floor materials—solid wood, for example, or tile—require a perfectly level underlayment. To achieve that, use Rapid Set Concrete Leveler to fill in low spots and create a new, level surface. Assuming ideal conditions, you can be walking upon—or installing a new floor over—your freshly flat concrete surface within a matter of hours!