Collapsing garage roof; installing a dry well

ASK THIS OLD HOUSE kicks off its seventh season on PBS when general contractor Tom Silva saves a homeowner from a collapsing garage roof by replacing a rotting support post. Then Tom, host Kevin O'Connor, landscape contractor Roger Cook and plumbing and heating expert Richard Trethewey ask, "What is it?" Roger then helps a pair of homeowners dry out a basement by installing a dry well to handle discharge from their sump pump.