Leak Detection in Toronto

Signs of a hidden leak

Hidden leaks rarely announce themselves with a puddle. More often you notice:

• A bill that climbs while your routine has not changed.
• A ceiling stain under a bathroom, often brown-edged.
• Paint bubbling or baseboards swelling.
• A stale, damp odour confined to one cupboard.
• A faint rush of water with every tap closed.
• Patches of warm floor over a slab, a hint that a hot line is leaking underneath.

Meter tests you can do

Your water meter is the best free leak detector you own. In most Toronto houses it sits in the basement near where the service enters, close to the main shut-off. Shut every faucet and stop any machine that draws water. Jot down what it shows, or study the tiny leak-indicator wheel. Leave everything off for sixty minutes and look again.

Movement means water is going somewhere. Next, close the shut-off valve on each toilet and test once more. If the meter stops, a toilet flapper was the leak, which is common and easy to fix; see our running toilet essay. If it keeps moving with toilets off, the leak is in the piping.

Tools for finding leaks

We work from least invasive to most.

1. Isolation. Closing branch valves one at a time narrows the leak to a zone.
2. Moisture meters. Pin and pinless meters map wet areas in drywall and wood.
3. Thermal imaging. A camera shows cool or warm patches where water spreads inside a wall or under a floor.
4. Acoustic listening. Pressurized leaks hiss; sensitive microphones help pinpoint them along a buried line.
5. Pressure testing. Isolated sections can be pressurized and watched for loss.

Only after those steps do we open a wall, and then with a small, targeted cut.

Leaks people often miss

A few sources come up again and again. The fill valve on a toilet that hisses quietly at night. A dishwasher supply connection under a cabinet kickplate. A shower valve body seeping into the wall behind tile. The tiny compression nut at the fridge line. A humidifier on the furnace with a stuck solenoid. Each one can run for months without a visible puddle, and each one shows up on the meter.

Repair and drying

The fix depends on the cause: a pinhole in an old copper line, a failed compression fitting under a vanity, a split pipe from a cold snap. Where the old piping is failing in several places, spot repairs may only buy time and repiping becomes worth discussing. Sudden failures are covered under burst pipe repair.

Wet framing and insulation must dry fully before walls close. For significant water damage, a restoration company with dehumidifiers is the right call, and your insurer may want photos first.