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Chimney liners

Stainless chimney liners in Pittsburgh

Cracked clay tiles, a new insert, or a water heater left alone in a big old flue: all of them come down to the liner. We install stainless steel liner systems sized to the appliance they serve, and show you photos of the flue before and after.

What a liner does

The part of the chimney that does the work

The liner is the channel inside the brick that carries smoke and exhaust out of the house.

  • Keeps heat in the flue, away from the masonry and the wood framing around the chimney.
  • Keeps exhaust out of the brick, including acidic condensation from gas appliances.
  • Helps the appliance draft, when it's sized correctly.

You can't see liner damage from the firebox. A Level 2 camera inspection can.

Before

Old clay tile

Most older Pittsburgh homes have stacked clay tiles joined with mortar. Over decades they crack and the joints open up from chimney fires, settling, freeze-thaw and acidic condensate. Some older chimneys have no liner at all. Gaps can let heat reach framing and let exhaust, including carbon monoxide, seep into the house.

After

Sized stainless liner

A continuous stainless flue inside the old one, sized to your appliance, connected at the bottom, sealed with a top plate and capped. Insulated where the listing requires it.

When you need one

Six common reasons to reline

Damaged clay tiles

Cracks, gaps or missing mortar joints on a camera scan. Repairing individual tiles high in a flue is rarely practical; a liner fixes the whole run.

After a chimney fire

The heat of a chimney fire can crack tiles from top to bottom. A Level 2 inspection tells us whether relining is needed.

Adding an insert or stove

Most insert and stove manufacturers call for a properly sized liner connected straight to the appliance. We install it as the instructions require.

New furnace or water heater

A new appliance may need a different flue size than the old one. Changes like this are also when NFPA 211 calls for a Level 2 inspection.

An "orphaned" water heater

When a high-efficiency furnace is vented out the side of the house, the water heater can be left alone in a flue sized for two appliances. See below.

An unlined chimney

Some older chimneys were built with no liner. If an appliance vents into it, relining is usually the way to make it safe to use.

A common Pittsburgh situation

New furnace, old flue

Many homes here originally vented a gas furnace and a water heater through the same masonry chimney. When the furnace is replaced with a high-efficiency model, it usually vents through plastic pipe out a side wall instead. The water heater stays on the chimney, now alone.

A small appliance in a large, cold flue may not draft well. Its exhaust cools before it reaches the top, condenses on the tile, and slowly damages the liner and mortar. Poor draft can also let exhaust spill back at the water heater.

The usual fix is a stainless liner sized for the water heater. If you've had a furnace replaced and nobody looked at the chimney, it's worth an inspection.

Signs your liner needs attention

  • Pieces of tile or flaky debris in the firebox, cleanout or at the base of a furnace flue
  • A camera report showing cracked tiles or open joints
  • Smoke or odor showing up in other rooms or the attic when the fireplace is in use
  • Rust, soot or moisture around the water heater's draft hood
  • White staining or damp brick on the outside of the chimney, especially in winter
  • You had a chimney fire, or suspect one
Have a CO alarm on every floorEspecially on any level with a fuel-burning appliance. If it sounds, get outside first and call 911 or your gas utility from there.
What's included

A complete liner system

  • Level 2 inspection. Relining is a change to the system, so the full flue is inspected and recorded on camera first.
  • Sizing to the appliance. The diameter comes from the appliance's requirements and the chimney's height, not from what's on the truck.
  • A listed stainless system. Liner, connectors and top plate installed to the manufacturer's instructions, with the alloy chosen for the fuel.
  • Insulation where it's required. Many listings call for an insulation wrap, especially for wood-burning and where clearances to framing are tight.
  • A proper connection at the bottom. A tee and cleanout for stoves and inserts, or a connector for a furnace or water heater.
  • Top plate and cap. Sealing the top of the chimney around the liner and keeping rain and animals out.
  • Before-and-after photos. So you can see the new liner in place, top to bottom.
How it works

Relining, step by step

  1. Inspect and measure

    Camera scan, flue measurements and appliance details. You get photos and a written estimate.

  2. Prepare the flue

    We sweep the old flue. Where needed, broken tile or obstructions are cleared so the liner can pass.

  3. Install and connect

    The liner goes in from the roof, is connected at the appliance, then sealed at the top with a plate and cap.

  4. Test and record

    We check the draft and connection, then send you the after photos.

Common questions

Chimney liner questions

Already have a camera report from another company? Call and we can talk it through.

(412) 555-0142
Can't you just repair the cracked tiles?
Occasionally, if the damage is minor and within reach. Most damage is spread through the flue, though, and individual tiles deep inside a chimney can't be replaced without taking the chimney apart. A stainless liner creates a new, continuous flue inside the old one, which is usually the practical fix.
How much does a chimney liner cost?
It depends on the chimney's height, the liner diameter and alloy the appliance calls for, whether insulation is required, and how much prep the old flue needs. After the Level 2 inspection you get photos and a free written estimate, and nothing is installed until you approve it.
Does a gas furnace or water heater need a liner?
It needs a sound, correctly sized flue. Many older clay flues are too big for modern gas appliances, especially a water heater left on its own after a furnace upgrade, and gas exhaust produces acidic condensation that breaks down tile and mortar over time. A liner sized for the appliance solves both problems.
Will a liner change how my fireplace drafts?
A correctly sized liner usually drafts as well or better than a damaged or oversized flue, because the exhaust stays warmer and moves faster. Sizing is the important part. A liner that's too small for an open fireplace can cause smoke to spill into the room, which is why we size from the appliance and the chimney, not a rule of thumb.
Do stainless liners need to be swept?
Yes. A liner serving a wood stove or fireplace still collects creosote and needs inspection every year and sweeping as needed. We use poly brushes on stainless liners, because wire brushes can scratch them.
Why does my old chimney need a Level 2 inspection before relining?
NFPA 211 calls for a Level 2 inspection when changes are made to a chimney system, and relining is one of them. It also gives us the measurements and information we need to size the liner, and gives you a record of the flue before the work.
Book your visit

Pick a time. We'll handle the rest.

Send the form and we'll text you within one business hour to confirm your service, your price and a 2-hour arrival window.

  • Price in writing first. Nothing starts until you've seen it and said yes.
  • 2-hour arrival window, with an on-the-way text and your technician's name.
  • No mess. Drop cloths, shoe covers and a HEPA vacuum.
  • Photo report texted to you the same day.
  • Licensed & insured. Saturday appointments available.
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