Ceiling stains almost always trace back to water leaks in the plumbing above, not the roof, once you're more than a few feet from an exterior wall. In older Thornhill homes near Beverley Glen and German Mills, that usually means a supply line or main water line joint that developed a pinhole after decades of service. Newer construction near Langstaff sometimes has the opposite problem: PEX fittings never fully seated during the original build.
A slow leak can travel a surprising distance before it shows up as a stain, since water follows the joists rather than dropping straight down. That's why we run a plumbing video camera through the line first, using the same diagnostic tools and equipment on a bungalow as a two-story. This water leak detection work takes patience, but it avoids opening drywall in the wrong spot.
Clogged drains cause a different kind of overflow, usually lower in the home, but a badly blocked upstairs bathroom drain can overflow at the fixture and soak through the subfloor into the ceiling below. HydroScrub® Jetting clears the blockage at its source instead of pushing it further down the line.
We handle the plumbing repair, meaning we find and fix the leak. Ceiling drywall repair, texture matching, and water damage restoration fall outside our trade, and we're upfront about that from the first call.
Commercial property owners in Thornhill face the same problem on a larger scale, often behind a suspended ceiling tile in an office. We inspect the plumbing lines above the ceiling grid with the same camera equipment, following standard safety practices, and working around your tenants' schedule.
