Leaky PVC drain trap; installing bamboo flooring

Plumbing and heating expert Richard Trethewey helps a homeowner repair a leaking PVC drain trap underneath his kitchen sink. Then, Richard, host Kevin O'Connor, general contractor Tom Silva and landscape contractor Roger Cook ask, "What is it?" Tom helps a pair of homeowners install a new bamboo "floating" floor in their basement. In the ASK THIS OLD HOUSE loft, Roger shares a viewer tip for cleaning roof gutters without a ladder.