Anthony — TSSA-Certified G1 Gas Technician
TSSA G1 licence #TBD · 15+ years in gas and mechanical trades · Service area: Greater Toronto Area, Ontario
Last updated: 2026-08-03
Why do older masonry chimneys in rural Uxbridge Township cause red tags?
Rural properties across Uxbridge Township frequently rely on older masonry chimneys, some original to farmhouses built well before modern gas appliances existed and later adapted to vent a furnace or boiler. These chimneys are often oversized for a modern, more efficient appliance's flue gas output, and the unlined or partially deteriorated masonry can allow flue gas to cool too quickly, condense, and fail to draft properly.
The result is spillage detected during a routine service call or inspection, and the correction typically involves installing a properly sized metal liner inside the existing masonry chimney rather than rebuilding the chimney itself, though liner installation and any masonry repair required around it is coordinated through a vetted partner contractor rather than performed directly.
What causes red tags in the Uxbridge village core versus newer subdivisions?
Uxbridge's older village core has a mix of century homes and mid-century construction where gas piping and appliance placement have often changed hands across several owners and renovations, similar in pattern to older cores elsewhere in Durham Region but on a smaller scale given the town's size.
Newer subdivisions near the edges of town use modern sidewall-vented condensing furnaces, and the failures there tend to be vent clearance issues from landscaping or deck additions rather than the chimney-related spillage seen in the rural township.
How does propane fit into Uxbridge Township's red tag picture?
A meaningful share of properties in Uxbridge Township, particularly further from the village core, run on propane rather than natural gas, since not all of the township is within the Enbridge distribution area. The tagging and certification process is identical to natural gas: a certified gas technician holding a G1 licence can clear a tag on either fuel type.
Identifying the fuel type before a technician attends, along with a photo of the appliance data plate, allows the correct orifice and manifold pressure setup to be prepared in advance.
What should I send before requesting red tag service in Uxbridge?
As with the rest of Durham Region, four photos speed up the process considerably: the tag itself showing the stated defect, the appliance, the data plate, and the venting or chimney arrangement. Given the more rural layout of much of Uxbridge Township, this also helps confirm ahead of time whether the property is on natural gas or propane.
Frequently asked questions
Can an old masonry chimney be relined instead of rebuilt to clear a red tag in Uxbridge?
In most cases, yes. If the existing masonry structure is sound, installing a properly sized metal liner sized for the connected appliance's flue gas volume resolves the draft and spillage problem without needing to rebuild the chimney. Any masonry work required is coordinated through a vetted partner contractor.
Is my rural Uxbridge Township property likely on propane or natural gas?
Properties closer to the village core of Uxbridge are more likely on the Enbridge natural gas distribution network, while properties farther out in the township are more likely to run on propane by tank. Your utility bill or a tank supplier account will confirm which applies.
Does chimney liner work count as part of the red tag correction?
Yes, if the liner is the cause of the spillage defect noted on the tag, installing it is part of the correction required before the appliance can be returned to service and the tag can be cleared.