Chimney Flue Repair in Connecticut

The flue is the passage inside a chimney that smoke and combustion gases travel up. The liner is the surface that forms that passage — traditionally clay tiles stacked inside the masonry, on newer work a stainless steel pipe, and on older chimneys sometimes nothing at all.

So when a flue is damaged, what is nearly always damaged is the liner. That is why flue repair and liner repair end up describing the same work, and why a conversation that starts with "the flue is cracked" usually ends with a liner decision.

The exception is the masonry around it. Where a chimney has no liner, or where the liner has gone and the flue is bare brick, the passage itself is the masonry — and that is a different and larger piece of work.

Small, isolated damage in an otherwise sound clay liner can sometimes be repaired in place — sealing or resurfacing the affected joints rather than replacing the lining. That is the least involved option and it is not always available.

Where the damage is extensive, where tiles have broken up, or where the flue is unlined and going into service for a modern appliance, relining is the answer: a new liner fitted inside the existing flue, sized to what it serves. That is a liner installation rather than a repair, and it is a different page and a different decision.

And sometimes the right answer is neither. A flue with minor surface crazing that vents an open fireplace occasionally may not need work at all. What matters is establishing which of the three you are actually looking at, which means someone looking up the flue rather than guessing from the room.