Sound flue linings restored in Riverside Park

Where the flue begins above the fireplace

Above a masonry fireplace, the first clay tile rests on the sloping walls of the smoke chamber, and every tile above stacks on it. Building rules begin the lining at that point. A defect there can belong to the tile, to the chamber that holds it, or to both.

We look at the lowest tiles from the fireplace and describe what we see. Repairs to the chamber itself belong to smoke chamber repair and are listed separately. The flue repair estimate covers the lining, and the two decisions stay visible side by side.

Matching the defect to a repair route

The defect found in the flue decides the route, not a preference for one product. Here is how the main findings usually line up with the options we explain at the free inspection.

Where findings are mixed, the most demanding one usually decides. We explain that reasoning in the estimate, so you can see why one route was chosen over another and what it leaves untouched.

• A cracked tile near the top: local replacement
• Open joints with sound tiles: a joint repair method
• Joints and minor defects along the run: resurfacing, if eligible
• Missing, loose or badly broken tile: relining

Keeping the chimney closed between work days

Flue repair can run across more than one day, especially with curing between stages. The top of the chimney may be open while work is underway. A cover goes over the flue top before we leave the roof each day, keeping rain and leaves out.

Inside, the fireplace opening is protected and the area is left clean. Debris from loose tile, mortar ridges and cleaning is cleaned up and hauled away. If the fireplace must stay closed during curing, we tell you how long to plan for. Nothing is left loose on the roof overnight.

A repair has to reach the defect it names

A repair is only useful where it actually reaches the damaged section. A method applied from the top that stops short of a deep crack has not repaired that crack. The estimate should make clear which sections the work covers.

We describe the reach of the proposed method in plain terms. If the defect sits beyond it, we say so before you approve anything. Finding out later that the damaged section lay outside the paid work is exactly what this avoids. The estimate lists treated sections by position, not by a general promise.