Preventative Maintenance in London, ON

A deeper look at how London conditions shape the preventative maintenance work owners actually need.

London's preventative maintenance program earns its value most visibly in one trade: HVAC. The city's heating season runs from October through April, a full six months of sustained furnace operation. A gas furnace that is five percent below peak efficiency because of a dirty heat exchanger, a partially blocked flue, or a flame sensor running at the edge of its tolerance range does not fail spectacularly on day one. It runs slightly hotter, slightly harder, and slightly less efficiently through October, November, and December. By January, when London records sustained lows below minus 15 degrees Celsius, the accumulated wear crosses a threshold and the system shuts down on a safety lockout. The tenant calls at 11 p.m. on a Thursday. Every licensed HVAC technician in London is already booked.

The second major preventative dividend in London is water damage prevention. Ice dams form when heat escapes through inadequately insulated attic floors, warms the roof deck, and melts snow above the eave line. That meltwater runs down the roof, hits the cold eave overhang where it freezes into a dam, and backs up under shingles. In a single ice dam event, London homeowners have seen water migrate three to four metres up a roof plane before dripping through into attic insulation, ceiling drywall, and interior finishes. A fall inspection that identifies thin attic insulation above eaves, confirms soffit ventilation is not blocked, and checks eave flashing integrity takes a licensed contractor two to three hours. Remediation of an active ice dam water infiltration event, including insulation removal, drywall replacement, paint, and structural drying, routinely runs several thousand dollars.

Plumbing preventative work in London concentrates on two areas: supply line exposure and water heater longevity. London's tap water from the Thames River treatment system is moderately hard, and while not at the extreme levels of some Ontario municipalities, regular sediment flushing extends water heater tank life in the 40 to 45 year old housing stock where original plumbing infrastructure is still common. All gas appliance work, including furnace and water heater service, is performed under TSSA oversight by Skilled Trades Ontario certified technicians.