Lawn improvements; leaky ceiling

Landscape contractor Roger Cook shows host Kevin O'Connor how to improve a lawn by using a "slice seeder." Plumbing and heating expert Richard Trethewey and general contractor Tom Silva share a tip from a viewer on how to drive a nail into a tight spot. In the ASK THIS OLD HOUSE loft, Kevin gets tips from a real estate specialist on how to prepare a home for sale. Richard visits a homeowner to help fix a water leak in the living room ceiling.