Ask This Old House
4.9Returning SeriesDocumentary

Ask This Old House

The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a virtual truckload of questions on smaller projects, and the This Old House crew is ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by viewers - and the crew even makes house calls!

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7. Moss, Algae and Lichen; Leaky Water Valve; Planting Shade

0.0Nov 17, 2005 · 30 min

General contractor Tom Silva shows a homeowner how to remove moss and lichen from his shade-covered roof and keep them from coming back. Then Tom, along with plumbing and heating expert Richard Trethewey, landscaping contractor Roger Cook, and host Kevin O'Connor ask, "What is it?" Up in the loft, Richard shows Kevin how to repair a leaky valve by replacing the washer and valve seat. Then, Roger helps a homeowner plant shade-loving groundcover under a 100-year-old beech tree.