Stainless steel liner installation for North Main's Craftsman bungalow dual-stack chimneys — active fireplace flue relining and abandoned furnace flue sealing treated as separate scopes. Written scope before work begins.
North Main's Craftsman bungalows — built primarily between 1910 and 1940 — typically contain a single chimney stack with two separate clay tile flues inside. Each flue has its own condition, its own damage history, and its own appropriate relining or sealing treatment.
An uncapped abandoned furnace flue in the same stack as a freshly relined fireplace flue is a continuing problem. Moisture entering the abandoned flue saturates the shared chimney masonry from inside, accelerating deterioration of the same brick and mortar that the active flue liner is protecting from combustion gas. Animals nesting in the abandoned flue can also migrate into adjacent spaces. Capping the abandoned flue at the same service visit as the active liner installation is the standard practice — it is not optional maintenance.
North Main relining work covers both flues in the stack and addresses the specific damage patterns of 80–110 year old Craftsman bungalow chimneys.
Each flue in the shared stack is camera-inspected independently before any relining decision is made. Tile joint condition, missing sections, and interior deposits are documented. The active and abandoned flues often show different damage patterns driven by their different histories.
Flexible stainless liner in the correct diameter for the firebox and flue height is fed from the chimney top to the firebox collar. Top plate seals the annular gap. Cap installed at the liner termination. Liner alloy selected for fuel type — 304 for wood, 316L for gas.
Stainless steel cap permanently seals the abandoned furnace flue opening at the chimney crown. Prevents moisture entry, animal access, and cold air infiltration into the chimney stack. Installed on the same visit as the active flue liner where logistically possible.
Camera inspection findings, liner specification, alloy selection, and installation date documented in writing before work begins. Final documentation provided to the homeowner after completion, including manufacturer liner warranty information.