Truebore Flue & Liner Works · Coldharbour Ledge · the liner workshop
A liner is not a part. It is the whole flue, made new from the inside.
Truebore relines chimneys the length of the Ledge — rigid 316Ti stainless for wood and oil, cast-in-place pumice for the crooked old flues no rigid liner can follow, and clay-tile restoration where the original deserves it. Every liner is sized from draft readings and draw-tested before your first fire; none is ever sold without camera footage to argue for it.
Services & rates
The workshop card
Prices from last quarter’s workshop tickets, and the invoice repeats the card before it repeats itself. Nothing here is quoted from a ladder: the Level 2 footage names the route, and the card prices it.
Rigid 316Ti reline$2,350–3,400
Insulated stainless sized from the appliance and the manometer — terminated and draw-tested
Cast-in-place pumice reline$3,800–5,200
A poured masonry lining for flues too crooked or too far gone for steel
Clay-tile restorationfrom $1,100
Cracked tiles cut out at the thimble and elsewhere, replaced in matched stock
Top-sealing damper$650
Closes at the chimney top like a biscuit tin — supplied and fitted with the cap
Stainless mesh capfrom $205
Fitted and screwed down — never wired on
Draw test$0
Smoke pencil and manometer readings, before and after — with any visit
Rigid stainless
Rigid 316Ti, insulated, in sections lowered on a recorded run. The default for straight flues serving wood and oil: best draft, best endurance, a lifetime warranty, and a surface third-degree glaze cannot grip the way it grips old clay.
Cast-in-place pumice
A former is winched down the stack and an insulating pumice mix poured around it — a new masonry flue cast inside the old, following bends no rigid liner could. The route for the crooked Ledge flues every steel shop has declined.
Restored clay
Two cracked tiles at the thimble is a tile job, not a reline. Cut out, replaced in matched stock, jointed and camera-proven — the original flue carries on, and the invoice carries a fifth of the number a reline would have.
How it goes
How a reline runs
The same sequence on every job — the only variable is your project.
Stage 1
The footage names the route
A Level 2 camera scan, watched on the monitor together: crack widths measured, offsets mapped, mortar judged. Rigid, cast or restored is decided by what the walls show — not by what the workshop has on the rack this week.
Stage 2
The sizing
Appliance output against measured draft, calculated, not assumed. An oversized liner is the making of a smoking stove and a glaze problem; the manometer reads the chimney as it is before we commit steel to what it should be.
Stage 3
The drop — or the pour
Rigid sections lowered and jointed on a recorded run, wrapped and terminated; or the former winched and the pumice poured in lifts. Old tiles out only where the footage said they must come out.
Stage 4
The proof
Smoke pencil and manometer, before and after, written on the ticket. The liner is not finished when it is in — it is finished when the draft reading says so, and you light the first fire on our word.
Coldharbour Ledge & district, 2025 — 2026
Recent liners
Six tickets from the workshop rack, photographed at the draw test. Rigid, cast and restored — the footage chose, not the stockroom.
Tickets filed since 2001
The workshop count
The honest ones included — the scans that kept the original clay are the tickets we count first.
Two outfits quoted a full reline on this crooked old stack; one said no steel could follow the offset, the other priced it anyway. Truebore poured the cast-in-place — pumice around a former, following every bend the original brickmaker made. It draws better now than the day it was built, and the ticket has the readings to prove it.
The footage showed two cracked tiles at the thimble and thirty sound feet above them. They replaced the tiles, camera-proved the joints, and charged a fifth of the reline number I had braced for. A workshop that talks you out of work is a workshop you ring back.
Our stove smoked for two winters on an inherited liner that was simply too big. Re-sized, re-dropped, draw-tested — the difference showed on the first match. The before-and-after readings are on the ticket, framed in the woodstore as a warning to the previous owner.
Liner questions
The five the workshop bench answers most weeks. Anything more particular, the workshop phone runs seven to five and the answer comes with a reading attached.
Stainless, pumice or clay — which is mine?
The footage decides. Straight flues serving wood or oil take rigid 316Ti; stacks with offsets too sharp for steel take a cast-in-place pumice pour; and a flue whose only fault is two cracked tiles gets the tiles replaced. We run all three routes from one workshop, so the flue picks instead of the stockroom.
Why does liner size matter so much?
Because the flue gas has to keep moving. Oversize it and the gas slows, cools, and drops its tar as glaze on the walls — the smoking stove and the chimney fire both start as a sizing decision. We calculate from the appliance output and confirm against the measured draft before steel is cut.
How long does a reline take?
A rigid drop is a day, usually — scaffold, drop, terminate, draw test, down. A cast-in-place pour runs two to three with curing between lifts, and a tile restoration is a morning with a camera check after. The ticket carries the schedule before the work starts.
Does a lined chimney still need sweeping?
Every burning year, NFPA 211 and us both. Insulated rigid liner runs drier and glazes less than old clay, but less is not none — the sweep that follows reads the workshop ticket and grades against the liner that is actually in the wall.
What does the lifetime warranty cover?
The rigid 316Ti material and our jointing, for as long as you own the house — including against flue-fire temperatures the insulation is rated for. It does not cover neglect: the warranty asks for an annual sweep, and the sweep’s card is the receipt that keeps it alive.
Workshop visits inside the fortnight; footage-first quotes inside the week · (555) 072-6418 · shop@trueboreflue.example
Have the footage name the route
Tell us the chimney, the appliance, and what the last sweep or survey wrote — paperwork welcome, we read it. Every quote starts from a Level 2 scan, so the route is chosen by your flue walls and priced off the card. shop@trueboreflue.example