Stainless and poured liners for cracked, oversized, or unlined flues — typically $1,500–$5,000.
Three situations call for relining: a clay tile liner that is cracked or missing pieces, a flue that is oversized for the appliance venting into it, or a chimney built with no liner at all — common in older Hartford County homes. An unlined or damaged flue lets heat, smoke, and corrosive exhaust reach the masonry and the house framing. That is a safety problem, not a cosmetic one.
Stainless steel liners are the most common choice: a rigid or flexible tube sized to the appliance, insulated where required, with a long warranty. Poured-in-place systems cast a new cement flue inside the old one and suit some odd shapes and multi-flue stacks. The right choice depends on your flue's shape, your appliance, and the condition of the masonry — not on which product the company stocks.
Relining typically runs $1,500–$5,000 in Connecticut. Height, diameter, offsets, insulation, and the appliance connection all move the number. A short, straight flue on a ranch is the low end; a tall, offset flue on a three-story colonial with an insert is the high end. Compare liner material, insulation, and warranty length across quotes — a cheaper liner with a short warranty is not the same job.
A liner protects the inside of the flue. It does not fix a cracked crown or failed flashing that lets rain in from the top. If your quote includes a liner but ignores visible masonry damage, ask why — the two problems need two fixes, and the water problem comes first.
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