Selecting and installing a new dishwasher, sharpening wood chisels and the proper use of lawn spreaders.

Plumbing and heating expert Richard Trethewey helps a homeowner select and install a new dishwasher. In the ASK THIS OLD HOUSE loft, Richard, general contractor Tom Silva, landscape contractor Roger Cook and host Kevin O'Connor ask, "What is it?" Then, Tom shows Kevin how to sharpen wood chisels using different types of sharpening stones. Roger and Kevin head outside for some lessons on the proper use of lawn spreaders.