Chimney Liner Installation
in Seattle, WA
What We Do
Seattle Chimney Liner Installation Services
Seattle's original clay tile liners have a finite service life — and many have reached it. Gas insert conversions, oil-to-gas transitions, and failed clay tile systems all require relining. Stainless steel liner installation with written documentation.
Stainless Steel Liner
Flexible stainless steel liner is the standard relining solution for most Seattle chimneys — accommodates the offsets, bends, and dimensional inconsistencies common in pre-war masonry construction. Available in 316L alloy (gas and oil appliances) and 304 alloy (wood-burning fireplaces).
Gas Insert Liner Sizing
Converting to a gas insert requires a correctly sized liner — typically 4-inch or 6-inch diameter depending on the insert's BTU output. Using the existing oversized clay tile flue for a gas insert creates condensation problems and CO safety risk. We assess the specific insert requirements before installation.
Oil-to-Gas Conversion
Seattle's historic oil-burning homes — particularly in Ballard, Magnolia, and the north end — have large-diameter clay tile flues originally sized for oil furnace exhaust. Converting the heating system to gas requires liner downsizing to match the new appliance's exhaust volume. We coordinate with HVAC contractors on liner specification.
Clay Tile Liner Assessment
Not every deteriorated clay tile liner requires full replacement. HeatShield liner repair — a castable resurfacing product — can extend the service life of liners where deterioration is limited to mortar joint failure rather than tile cracking. We assess which approach is appropriate before recommending installation.
Pre-Installation Inspection
A Level 2 inspection before liner installation confirms the flue path is clear, the liner dimensions are correct, and any appliance-specific requirements are understood. Skipping the pre-installation inspection leads to liner sizing errors that can require reinstallation.
Written Documentation
Installation documentation includes liner specification, alloy and diameter, appliance compatibility, and inspection findings. The documentation SDCI and any future homeowner will need.
How It Works
Our Seattle Liner Installation Process
Pre-Installation Inspection
Level 2 inspection to confirm flue path, measure dimensions, assess existing liner condition, and confirm appliance-specific liner requirements before any liner is ordered.
Liner Selection
Alloy, diameter, and insulation determined by appliance type and BTU output. We specify the liner before installation — not after discovering a problem during the job.
Installation
Liner lowered from the top, connected at the appliance, and sealed at the top with an appropriate top plate and cap. Insulation blanket added where required by the appliance manufacturer or code.
Documentation
Written record of liner specification, installation date, appliance compatibility, and inspection findings. The documentation SDCI and future homeowners need.
Ready to Schedule?
Free estimates — no obligation. We come out, assess, and give you a clear picture.
Chimney Liner Installation in Seattle — FAQ
Common questions from Seattle homeowners. Don't see yours? Call us.
Local Context
Seattle's Liner Legacy — Clay Tile, Oil-to-Gas Conversions, and Why Relining Is Often the Right Answer
Schedule an AssessmentSeattle's pre-war residential chimneys were built with clay tile flue liners — typically 8x8-inch or 8x12-inch sections for standard wood-burning fireplaces, and larger for heating appliances. These liners were well-specified for their era, but clay tile has a finite service life. After 80 to 100 years of thermal cycling, the mortar joints between tile sections deteriorate, tiles crack, and sections can offset when a chimney settles. A deteriorated clay tile liner is a carbon monoxide pathway and a fire risk.">
Seattle also has a significant oil-to-gas conversion history. Many older Seattle neighborhoods — particularly Ballard, Magnolia, Crown Hill, and the north end — were built with oil-burning furnaces connected to large-diameter clay tile flues. As these homes converted to gas heating over the past several decades, many of the original oversized flues were simply left in place and connected to the new gas appliance. Gas exhaust operates at much lower temperatures and volumes than oil exhaust — in an oversized flue, it cools too quickly, produces condensate, and creates conditions for carbon monoxide backdrafting. A properly sized stainless steel liner solves this problem.
The Puget Sound Clean Air Agency's push toward gas appliances as a lower-emission alternative to wood burning has also accelerated gas insert conversions in Seattle. Homeowners choosing to install gas inserts in existing wood-burning fireplaces need a correctly sized liner for the insert — typically smaller than the original fireplace flue. This is not a detail that can be skipped. An oversized flue connected to a gas insert creates the same condensate and backdraft risks as an oversized oil-to-gas conversion.
"Seattle chimneys tend to need extra care to maintain their original character during rebuilds. These older masonry systems were built with real craft — matching that when we work on them takes more time, but it's the right way to do it." — Sean, Lead Technician
Related Services
Liner Installation
Full liner installation overview — alloy selection, sizing, insulation requirements.
Chimney Inspection
Level 2 inspection required before liner installation — we do both in a coordinated visit.
Chimney Cleaning
Annual sweep to maintain the new liner and catch developing issues early.
Schedule a Liner Assessment in Seattle
Gas insert conversion, failed clay tile, oil-to-gas — written assessment, correct liner specification, proper installation.