Ask This Old House - Season 4 Episode 7
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.
First Air Date : 2002-10-10
Last Air date : 2025-03-27
Runtime : 57 minutes
Genre : Documentary
Cast : Richard Trethewey, Norm Abram, Roger Cook, Kevin O'Connor, Tom Silva, Steve Thomas Rooney
Crew :
Quality : 
Subtitles :
- Season 4 : Episode 12005-10-06
- Season 4 : Episode 22005-10-13
- Season 4 : Episode 32005-10-20
- Season 4 : Episode 42005-10-27
- Season 4 : Episode 52005-11-03
- Season 4 : Episode 62005-11-10
- Season 4 : Episode 72005-11-17
- Season 4 : Episode 82005-11-24
- Season 4 : Episode 92005-12-01
- Season 4 : Episode 102005-12-08
- Season 4 : Episode 112005-12-15
- Season 4 : Episode 122005-12-22
- Season 4 : Episode 132005-12-29
- Season 4 : Episode 142006-01-05
- Season 4 : Episode 152006-01-12
- Season 4 : Episode 162006-01-19
- Season 4 : Episode 172006-01-26
- Season 4 : Episode 182006-02-02
- Season 4 : Episode 192006-02-09
- Season 4 : Episode 202006-02-16
- Season 4 : Episode 212006-02-23
- Season 4 : Episode 222006-03-02
- Season 4 : Episode 232006-03-09
- Season 4 : Episode 242006-03-16
- Season 4 : Episode 252006-03-23
- Season 4 : Episode 262006-03-30
