The appliance you burn picks your liner, and its price

Why relining comes up at all

A liner forms the passage that carries combustion products through the chimney. Its suitability depends on the appliance, fuel and surrounding construction. Relining proposals should identify an approved system and the applicable installation instructions, not simply a material and diameter.

Relining comes up for a handful of reasons. The clay tiles have cracked, shifted or lost the mortar between them. The chimney was built without a liner. You're adding a wood or gas insert that needs its own connection. Or the flue is far too large or too small for what's burning below.

Each of those reasons points toward a different kind of liner, and that's where the chimney relining cost starts.

An open wood fireplace

For a masonry fireplace burned with the doors open, the flue has to be large enough for the fireplace opening. The code ties flue size to the opening, so a big fireplace needs a big flue. That's why liners for open fireplaces are the larger products on the market.

Potential options depend on the existing flue and the appliance. An approved metal liner, a suitable repair system or reconstruction may be considered after assessment. Cast-in-place and other specialist systems have their own requirements; this list does not establish that every option is available for this project.

Size is one cost factor, but access, preparation and the chosen system can change the comparison. Ask which options are actually suitable and available before comparing their prices. A nominally smaller liner is not automatically the lower installed cost.

A wood insert

A wood-burning insert slides into the firebox and turns an open fireplace into a heater. Its exhaust outlet is much smaller than the old fireplace opening, and running that small exhaust into a big masonry flue lets the smoke cool and drop creosote fast.

The insert's installation instructions establish the permitted connection and liner arrangement. Many installations use a full-height liner, but no generic rule replaces the exact manual and applicable requirements. Identify the insert model before selecting materials or quoting the connection.

Because the liner is smaller, the liner itself can cost less than one for an open fireplace. The labor of connecting it to the insert, sealing the top and, where the listing calls for it, adding insulation, makes up the rest.

A gas insert or gas appliance

For a direct-vent gas insert, combustion air and exhaust follow model-approved paths. The permitted liner kit, terminations and routing depend on the model. Separate flexible liners are one arrangement, but should not be treated as a universal recipe for every gas appliance.

A furnace or water heater connected to a masonry chimney needs its own venting assessment. Sizing, appliance combinations, condition and condensate handling can affect the solution. A gas-rated liner alone does not automatically resolve every condensation or draft problem.

Gas-system material and connection requirements vary. Confirm the division of work for appliance service, gas piping and chimney repairs in the estimate, including any specialist work. The fuel type alone does not establish the price ranking.

Height, shape and bends

Height and offsets affect access and installation. The selected liner must permit the proposed route and bends. Do not assume that any flexible product can follow an existing offset, or that a difficult route can be solved by forcing the liner through.

Available liner shapes and permitted alterations depend on the system. A narrow rectangular flue may limit options. Removing existing tile or reshaping a product needs to be part of an approved plan that considers the chimney and appliance, not an improvised fitting method.

Top and bottom connections must follow the selected liner or vent system instructions. The estimate should identify terminations, weather protection, appliance connections and any required ventilation, rather than assume every system uses the same top plate and cap.

Insulation, and what the listing asks

Some liner systems require specified insulation as part of their installation. Its type and configuration must match the system requirements. Insulation is not a generic cure for missing clearances, damaged masonry or every other defect around a chimney.

Whether your job needs it comes from the liner's UL 1777 listing, the appliance manual and what the inspection finds about your chimney's clearances. It's a real line on the quote when it's required, and our pros explain why it's there. Leaving it out to lower a price puts the liner outside its listing, which is a shortcut nobody should take on your house.

Cost to reline a chimney, next to the alternatives

Alternatives can include an approved repair, relining, reconstruction or a change of appliance, depending on the condition and intended use. Compare feasible options after assessment. A relining proposal should say which existing defects it addresses and which require separate work.

When comparing chimney liner installation cost between companies, check that each quote names the liner material, the diameter, the length, the top plate and cap, any insulation, and how it connects at the bottom. A lower number that skips the insulation the listing requires isn't the same job.

Get your liner sized and priced

Adding an insert, or told your tiles are cracked? Our liner specialists, from a local family company, check the flue at no charge, size the liner to what you burn and put the full price in writing before you decide. Your first service receives a 10% discount. Talk to us about chimney liner installation at (352) 675-6366.