Chimney Liner & Rebuild Cost - You See the Footage Before You Get a Price

Every visit starts with

Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed

Worth knowing

Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.

Styles & brands we work with

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Before & after – our own jobs

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How Much Does Chimney Liner & Rebuild Cost in Boulder?

Chimney liner installation in Boulder, CO typically runs $2,400 to $5,800 for a stainless steel flex liner on a standard single-story home, while a full chimney rebuild – masonry, flue tile, crown, and all – lands between $4,500 and $14,000 depending on how much of the structure needs replacing. Most Boulder homeowners we see are dealing with cracked clay tile liners or spalling brick accelerated by the city’s wide daily temperature swings, and the majority of those jobs fall in the $2,800 to $4,200 range for liner replacement alone. Every quote from Emberly Chimney Cleaners Boulder comes in writing before anyone lifts a tool – that’s not a promise we invented; it’s Chimney Liner & Rebuild in Boulder done to Haven Standard Clause 1.

Chimney Liner & Rebuild Cost Breakdown (2026)

These are real price ranges pulled from jobs we’ve completed in Boulder and surrounding areas through early 2026. They reflect local labor rates, the altitude-specific material specs required here, and current supplier costs through our buying network.

What Moves the Price Up or Down

The single biggest cost variable in Boulder is chimney height. Homes in the Chautauqua, Mapleton Hill, and University Hill neighborhoods often have two-and-a-half or three-story Victorian-era chimneys that require extra liner footage and, in many cases, a mobile scaffold rental. That scaffold alone adds $300 to $700 to a job that would cost less on a ranch-style home in Gunbarrel or East Boulder.

Liner diameter is the second big driver. Wood-burning fireplaces need a larger flue opening than a gas insert – typically 7″ or 8″ versus 5″ or 6″ – and larger stainless liner costs more per foot in both material and the physical effort of routing it down a tight flue. If your fireplace was converted from wood to gas at some point (common in older Boulder homes that followed city air-quality rules), we need to size the liner to the current appliance, not the original opening.

Boulder’s altitude – sitting at 5,430 feet – also matters more than most homeowners expect. Draft behaves differently at altitude; a properly sized liner that would perform fine at sea level can cause backdrafting problems here if it’s even one diameter size off. We size every liner to the elevation, not just the BTU rating on the appliance tag.

Finally, permit cost. Boulder County requires a building permit for chimney work that involves structural changes, and the city of Boulder has its own air-quality ordinances that govern which appliances can be connected to a newly lined flue. Permit fees typically run $180 to $350 for liner jobs and higher for full rebuilds through our Chimney Liner & Rebuild services. We pull every required permit – that’s included in the written quote, not added later.

What Affects Chimney Liner & Rebuild Pricing in Boulder

• Flue height and chimney stack height: Every additional foot of liner adds material and labor cost. Taller Victorian-era stacks in Old North Boulder or the Whittier neighborhood routinely need 25-plus feet of liner, pushing totals toward the higher end of the ranges above.
• Liner material choice: Stainless flex liner (DuraFlex is our standard-spec material) is the most common choice and suits most gas and wood-burning applications. Cast-in-place ceramic costs more but is the right call when the flue is heavily irregular or has significant structural damage – we’ll tell you which one you actually need, not which one has the higher margin.
• Existing liner condition: A flue with hairline cracks in otherwise intact clay tile may qualify for HeatShield resurfacing at $1,800 to $3,400 – a meaningful saving over a full liner replacement. The camera scan we run on every visit is what makes that call accurate rather than a guess.
• Fireplace or appliance type: Gas inserts, wood-burning fireplaces, pellet stoves, and oil furnace flues each have different liner diameter and material requirements. A gas fireplace liner job in South Boulder might run $2,400; the same-size chimney serving a wood stove in Four Mile Canyon could run $4,000 or more because of BTU load and clearance specs.
• Smoke chamber condition: The smoke chamber – the funnel-shaped section between the firebox and the flue – is corbeled (stepped) brick in most pre-1990 homes in Boulder. City code and NFPA 211 both require it to be smooth-parged before a new liner goes in if the corbeling is exposed. Add $450 to $1,100 when this is needed.
• Access and roofline complexity: Steep-pitched roofs common on newer construction in the Newlands or Devil’s Thumb neighborhoods require fall-protection equipment and slow the work. Chimneys on the back of the house with no clean ground access may need additional equipment. We photograph the access situation and include any surcharges in the written quote – no surprises on invoice day.

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How to Save on Chimney Liner & Rebuild

Get the camera scan done before you agree to anything

The most expensive mistake we see Boulder homeowners make is agreeing to a full liner replacement based on a visual-only inspection – essentially a contractor looking down the flue with a flashlight. In roughly a third of the inspections we do where another company has already recommended a full liner, the camera tells a different story. Sometimes HeatShield resurfacing at $1,800 to $3,400 is the right call. Sometimes only the top section of clay tile is damaged and a partial replacement at $1,200 to $2,800 handles it. You can’t know which without a camera, and a camera scan is included as standard on every Emberly visit – it’s Haven Standard Clause 4, not an add-on.

Combine liner work with other chimney repairs

If your crown is cracked (a very common finding in Boulder after a freeze-thaw winter) or your smoke chamber needs parging, doing those at the same time as liner installation saves a mobilization trip and usually $200 to $400 in labor. We look for this combination on every job and flag it in the written scope before work starts – you decide whether to add it, not us.

Use the free second opinion on any written estimate

If another company has already given you a written quote for liner work, bring it to us. We review written competitor quotes at no charge and tell you whether the scope is right, whether the materials specified are appropriate for your setup, and whether the price is in line with the Boulder market. This isn’t a sales tactic – if the other quote is accurate and fair, we’ll say so. Call (970) 598-0453 to set that up.

Don’t delay a liner job longer than one season

A cracked clay tile liner doesn’t become safer with time. In Boulder’s climate, where overnight temperatures can swing 40-plus degrees in spring and fall, a hairline crack in October is often a fractured section by April. The cost difference between resurfacing a flue with early-stage damage and replacing the liner in a flue with late-stage damage can be $1,500 or more. We’re not saying this to pressure you – the camera footage from the inspection shows exactly where the damage is and how far it’s progressed, and you’ll have that documentation in hand before anyone asks you to decide anything.

Ask about scheduling flexibility

Boulder chimney work peaks in October and November when homeowners realize their fireplace isn’t ready for the season. If your liner job isn’t urgent – for example, you have a gas furnace on a separate flue and the damaged liner serves a wood-burning fireplace you haven’t used in two years – scheduling in January or February sometimes opens up faster appointment slots. We don’t artificially inflate prices in peak season, but flexible scheduling does let us plan crew routing more efficiently.

FAQs: Chimney Liner & Rebuild Cost in Boulder

How much does chimney liner replacement cost in Boulder, CO?

Chimney liner replacement in Boulder costs $2,400 to $5,800 for stainless steel flex liner on most residential chimneys, or $4,200 to $7,500 for a cast-in-place ceramic liner system. Gas appliance liners typically land at the lower end; wood-burning fireplaces and stoves, which need larger diameter liner, are usually mid-to-upper range. The Level 2 camera inspection we run before any quote – included at no extra charge – determines which liner type and diameter is right for your specific flue. Call (970) 598-0453 for a written estimate with the exact number for your chimney.

Is it cheaper to repair or replace a chimney liner in Boulder?

Repair (HeatShield resurfacing) costs $1,800 to $3,400 and is appropriate when the existing clay tile is cracked but structurally intact – no collapsed sections, no significant gaps at the joints. Full liner replacement runs $2,400 to $5,800 and is the right call when tile is fractured, missing, or the flue geometry has changed due to appliance conversion. The only way to know which applies to your chimney is a camera scan of the flue. We make that call from footage, not from assumption, and we document it in writing so you know exactly what we found and why we recommended what we did.

How long does a chimney liner last in Boulder’s climate?

A properly installed stainless steel flex liner (DuraFlex or similar UL-listed product) typically lasts 20 to 30 years. Clay tile liners in Boulder’s climate – with high UV exposure, dry air, and significant freeze-thaw cycling – tend to show cracking in 15 to 25 years, often sooner in chimneys on the north or west faces of a home where moisture exposure is higher. Cast-in-place ceramic liners generally outlast both; they’re rated for the life of the structure in most installations. The liner we install comes with a written warranty specific to the material, and that warranty is in your hands before work starts – Haven Standard Clause 1.

Do I need a permit for chimney liner installation in Boulder?

Yes, in most cases. Boulder County requires a building permit for chimney liner installation when it involves structural changes, and the city of Boulder enforces its own air-quality ordinances for solid-fuel appliances under the Boulder Revised Code. For a new gas insert liner, the permit process is straightforward and typically adds $180 to $250 to the project cost. For a wood-burning appliance liner or anything involving a full rebuild, permits run $250 to $350 and require a county inspection on completion. We pull every required permit and include the cost in the written quote – you don’t find out about permit fees on the final invoice.

How much does a full chimney rebuild cost in Boulder?

A full chimney rebuild in Boulder – from the smoke chamber up through the crown, including new flue liner – runs $4,500 to $9,500. A complete ground-up reconstruction, which is rare and typically only needed after significant structural failure or a house fire, runs $8,500 to $14,000 and includes all permits and the Boulder County inspection. Most “rebuild” jobs we see in neighborhoods like Mapleton Hill and University Hill are actually partial rebuilds: the below-roofline structure is sound but the exposed section above the roofline has deteriorated. Those jobs typically fall in the $4,500 to $6,500 range. Call (970) 598-0453 and we’ll give you a written number after the camera inspection – not a ballpark, an actual price.

Is it safe to use my fireplace with a damaged chimney liner?

No – and this is the one place on this page where we’ll be direct rather than diplomatic. A cracked or compromised flue liner allows combustion gases, including carbon monoxide, and heat to reach the combustible framing around your chimney. In Boulder homes built before 1980, many of which have firestop assemblies that no longer meet current clearance requirements, a damaged liner is a genuine fire and CO risk. We don’t say this to alarm you – we say it because it’s true and because a trained technician should assess the liner condition before you light another fire. The camera inspection gives you a factual picture of what’s there.

What the Written Quote Includes – and What Happens Next

When we come out to a Boulder home for a liner or rebuild assessment, here’s what actually happens: a background-checked, uniformed technician runs a full NFPA 211 Level 2 camera inspection of the flue and documents the findings with photos. You get a written scope of work, a written price, and a written warranty before anyone asks you to make a decision. That’s Haven Standard Clause 1 – it’s not a special offer, it’s how every single job works.

If the liner we recommend involves any high-tension cable work, structural masonry, or roof-height access, we use the right equipment and trained crew for it. We don’t ask homeowners to be on the roof during chimney work – and we’d never walk a homeowner through attempting liner work themselves. The forces involved in a deteriorating chimney system, and the CO risk of an improperly installed liner, put this firmly in the hands-of-a-professional category.

After the work is complete, you get a documented photo record of the finished installation – the before, the during, and the after. That record is Haven Standard Clause 4, and it matters when you’re talking to your homeowner’s insurance or your real estate agent later.

The 365-Day Done Right Promise covers every liner and rebuild job we do. If something isn’t right within a year of the installation, we make it right. That’s on every job, not just the expensive ones.

Materials come through our Haven buying network – DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield. These aren’t random selections; they’re what the supply network uses specifically because consistent sourcing keeps customer pricing honest. You’ll see the material spec in the written quote so you know exactly what’s going into your flue.

Boulder Neighborhoods We See Most Often for Liner & Rebuild Work

Our liner and rebuild jobs in Boulder tend to cluster in a few areas, and each has its own pattern. In Mapleton Hill and University Hill, it’s older masonry – pre-1960 clay tile liners that have seen enough freeze-thaw cycles to develop significant joint gaps or collapsed sections. In Newlands and the Whittier neighborhood, we see a lot of wood-to-gas appliance conversions where the liner was never resized for the new appliance, causing persistent backdrafting. In Gunbarrel and the East Boulder neighborhoods closer to the plains, wind-driven moisture gets into uncapped or cracked-crown chimneys and accelerates liner spalling faster than in more sheltered locations. In the Four Mile Canyon and Sugarloaf areas outside the city limits, we often find liners that were installed when building codes were less specific about altitude-adjusted sizing – and those create draft problems that don’t show up until you’re actually running the fireplace in January.

None of that means your situation matches a pattern. The camera tells the actual story. But it does mean we’re not learning Boulder chimney conditions for the first time when we show up at your house.

More than 38,000 chimney inspections and cleanings completed since 2009, every one with a written price before work started and a documented record when it was done – that’s not a figure we put on the home page because it sounds good. It’s the number of jobs where the process worked the way it was supposed to.

Key Takeaways

• Chimney liner replacement in Boulder runs $2,400 to $5,800 for stainless steel flex; HeatShield resurfacing runs $1,800 to $3,400 when the existing tile is repairable.
• Full chimney rebuilds range from $4,500 to $14,000 depending on how much of the structure is being replaced.
• Boulder’s altitude, freeze-thaw cycling, and air-quality ordinances all affect liner sizing and permit requirements – these are local factors that general price guides don’t account for.
• A Level 2 camera scan is included on every Emberly Chimney Cleaners visit; it’s what makes the scope of work accurate rather than estimated.
• Every quote is written before work starts. No exceptions. No “we’ll finalize pricing once we’re in there.”
• The 365-Day Done Right Promise covers every liner and rebuild job.
• Permits are included in the quoted price – you won’t see them appear as a line item on the final invoice.

Get a Written Estimate for Your Boulder Chimney

If you’ve been quoted liner or rebuild work and want a second set of eyes on that estimate – or if you’re starting from scratch and want to know what you’re actually dealing with before you decide anything – call (970) 598-0453. Corrine Halstead and the Emberly Chimney Cleaners Boulder team answer live, 24 hours a day, 7 days a week. No voicemail, no web form that disappears into a queue. You’ll get a real conversation, a scheduled inspection, and a written price before anyone starts work. That’s the whole process.

Written by Corrine Halstead, Owner at Emberly Chimney Cleaners Boulder, serving Boulder, CO since 2009.

Pricing reflects the Boulder market as of 2026. Emberly Chimney Cleaners Boulder offers free estimates – call (970) 598-0453.