Moss, Algae and Lichen; Leaky Water Valve; Planting Shade (S04E07)
S04E07
General contractor Tom Silva demonstrates to a homeowner the best way to eliminate moss and lichen from a roof that doesn't get much sunlight, as well as how to prevent future growth. Later, Tom joins plumbing and heating specialist Richard Trethewey, landscaping expert Roger Cook, and host Kevin O'Connor for a segment titled "What is it?" In the loft, Richard guides Kevin through fixing a leaking valve by swapping out the washer and valve seat. Meanwhile, Roger assists a homeowner in planting shade-friendly groundcover beneath a century-old beech tree.
Show
Ask This Old House
Episode
S04E07
Air Date
Nov 17, 2005
Season 4 Episodes
S04E01
Mortared Stone Walkway Repair; Patching an Oak Floor
S04E02
Creaky Stairs; Static Cling Solution; Electric Shut-Off Valve
S04E03
Under-Sink Water Filter; Planting a Drought Resistant Tree
S04E04
Flat Tire; Aluminum Rain Gutter; Thermal Expansion Tank
S04E05
Rose Bushes; Wobbly Toilet; Water Leak; Hydraulic Cement
S04E06
Raised Garden Bed with Timbers; Clearing a Bathtub Drain
S04E07
Moss, Algae and Lichen; Leaky Water Valve; Planting Shade
S04E08
Circular Saw 101; Outdoor PEX Faucet; Cabling an Oak Tree
S04E09
Garage Roof Re-Shingling with Asphalt; Fiberglass Shingles
S04E10
Pruning an Overgrown Privet Hedge; New Laundry Sink
S04E11
Snowthrowers; What Is It? Installing A New Exterior Door
S04E12
Washing Windows; What Is It? Flushing an Electric Water Heater
S04E13
New Vinyl Floor; What Is It? Preventing Frozen Pipes
S04E14
Radon Mitigation System; Pruning an Apple Tree
S04E15
In-Ground Sprinkler System; Pouring a Concrete Footing
S04E16
Choosing Hammers; Pressure-Assisted Toilet; Plastered Wall
S04E17
Residential Well Repair; Repairing a Hole in Vinyl Siding
S04E18
Transplanting a White Spruce; Extending a Staircase Handrail
S04E19
Custom Radiator Cover; Installing a Steam Humidifier
S04E20
Granite Driveway Marker; Hot Water Radiator System
S04E21
Water Heater; Planting Trees to Save Energy; Cellulose Insulation
S04E22
Cast-Iron Radiator and Bathtub; Grading; Wobbly Newel Post
S04E23
Replacing an Interior Door; Leaky Kitchen Faucet
S04E24
Replacing a Dishwasher; Sharpening a Chisel; Lawn Spreaders
S04E25
Cutting Ceramic and Stone Tile; Installing a Sump Pump
S04E26
Mini-Split Air Conditioning System; De-Thatching a Lawn