Chimney Removal & Roof-Over in Toronto & the GTA

Plenty of GTA houses carry a chimney that hasn't vented anything since the furnace was converted decades ago. Now the brick is spalling from freeze-thaw, the flashing around it leaks every March, and you're paying to maintain something with no job. At some point the honest question stops being how to fix the chimney and becomes why you still have one at all.

The first step isn't demolition — it's confirming nothing still vents through the stack. A furnace, water heater or fireplace using that flue has to be re-routed before a single brick comes down. After that, we remove the chimney below the roofline, frame the opening to match the existing rafters, sheathe it, membrane it, and shingle it in. Done right, water has no reason to ever find that spot again.

We quote full and partial removal separately. Most homes only need the stack taken below the roof deck and roofed over — faster, tidier, and invisible from the street. Taking the interior chase down to the basement is a renovation decision, not a roofing one. Removal below the roofline is structural work that can require a municipal permit, and we'll tell you plainly when yours does.

• Verification that no furnace, water heater or fireplace still vents through the flue before demolition starts
• Brick and liner teardown to below the roof deck, hand-lowered or chuted — never dropped into the attic
• Framing the new opening with lumber sized to the existing rafters
• Sheathing tied into the surrounding roof deck
• Ice and water membrane over the patch, lapped up the slope
• Shingles matched as closely as current stock allows, woven into the existing courses
• Disposal of all brick, mortar and flashing debris

• Chimney size — a single flue comes down much faster than a wide double-flue masonry stack
• How far down it goes: below the roofline only, or through the attic and living space
• Roof pitch, height and access for lowering brick safely
• Masonry condition — loose, spalled brick comes apart quickly, while sound hard mortar fights back
• Shingle match — a discontinued colour can mean patching a larger area to avoid an obvious square
• Whether appliance venting has to be re-routed before removal can start

Every home is different, so we don’t publish flat prices — the quote is free and based on your actual job.