Sweep & inspection
Caps & crowns
Flue relining
Masonry repair
Gas fireplace serviceLevel 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
DuraFlex Chimney Cleaning in Gunbarrel, CO
We provide independent DuraFlex service across Gunbarrel, CO: inspection, sweeping, cap and top-plate work, and honest advice on whether your existing flexible stainless liner is still doing its job. The difference here is local. Gunbarrel’s 1970s and 1980s homes carry liners that were retrofitted into original clay-tile flues decades ago, and the work that matters most is diagnosing and maintaining those liners, not selling new ones. If you’ve noticed smoke rolling back on a windy evening, call (855) 632-3564. We answer 24/7.
Why Gunbarrel Residents Choose Us for DuraFlex Service
We work in chimneys only. That focus is what makes us useful to a Gunbarrel homeowner with a DuraFlex liner in the flue. We see flexible stainless liner systems often enough to know how they age, where they fail, and what a proper top plate and cap interface should look like. When we inspect a liner in a home off Spine Road or Lookout Road, we’re looking at specific things: joint integrity at the appliance connector, the condition of the insulation wrap, how the cap and top plate have held up against years of wind. A generalist who sweeps a few chimneys a month won’t read those signs the same way.
We’re an independent chimney company. We’re not affiliated with DuraFlex and we’re not an authorized dealer. What we are is a specialist that installs and services their products with quality parts that fit. From inspection to sweep to repair, the same chimney-only technicians handle the job. Our technicians have up to 13 years of experience. Clear scheduling, a written estimate before any work, and a straightforward answer on whether your liner can stay. That’s what you get when you call.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Common DuraFlex Chimney Cleaning Problems We Solve in Gunbarrel
A DuraFlex liner is a flexible stainless steel liner, and like any system it has known wear points. Here are the ones we handle most in Gunbarrel.
- Liner sections separating at the appliance connector. Decades of heat cycling loosen joints over time, and once they open up, creosote and flue gas can escape behind the liner instead of going up the flue. In Gunbarrel homes where the original masonry fireplace has been burning since the late 1970s or 1980s, this is one of the first things we check.
- Insulation wrap degrading inside the clay-tile chase. On insulated double-wall liners, the wrap can compress or break down over the years. That drops the liner’s listed clearance and gives creosote somewhere to collect in the annular space. The tight original chases in Gunbarrel’s older subdivisions are exactly where this happens.
- Top plates and caps pulling loose or corroding. Gunbarrel’s Chinook downdrafts put real stress on the parts at the crown. When a top plate works loose or rusts through, wind-driven rain and snowmelt run down the outside of the stainless liner. That’s a slow path to corrosion.
- Creosote glazing above an insert. When a liner isn’t fully seated at the top plate, the flue walls above the insert become a creosote trap, and glazed creosote is harder to remove than the fluffy kind. We find this a lot in installs that were retrofit rather than original, which describes most of the late-1970s and 1980s housing stock here.
- Draft and backdraft problems that look like liner failure. Sometimes the liner is fine and the cap or damper is the culprit. We check the whole system before recommending liner work, so a simple cap replacement doesn’t turn into a relining quote.
DuraFlex Service in Gunbarrel: What Local Conditions Mean for Your Equipment
Here’s the local fact that shapes everything about liner work in Gunbarrel: it’s unincorporated Boulder County, outside the city of Boulder’s no-burn ordinance zone. A DuraFlex-lined fireplace that would be legal to burn in here may still vent smoke into a neighbor’s sightline faster than owners expect. The county’s less-restrictive stance on wood burning means heavier burn seasons and faster creosote loading on original liners than in the city of Boulder next door. In a typical late-1970s Gunbarrel home with a DuraFlex retrofit liner inside an original clay-tile flue, the owner reports smoke rolling back into the room on windy foothill evenings and a strong creosote smell in shoulder season. On inspection, the top plate is often found loose or corroded and the liner’s insulation wrap compressed near the crown. A qualified sweep reseats or replaces the top plate and cap, removes glazed creosote from the liner and firebox, and documents whether the liner clearances still hold before another burn season. The freeze-thaw cycles and Chinook wind events along the foothills edge add their own pressure on crowns and exterior masonry.
DuraFlex Models & Products We Service in Gunbarrel
We service the kinds of DuraFlex products that show up in Gunbarrel homes: single-wall stainless flexible liner kits, double-wall insulated flexible relining systems, the 316L and 304L alloy liner variants, and the top-sealing damper and cap assemblies fitted to flexible liners. We install them too, and we service them after the fact. When a liner is still sound, we use OEM DuraFlex liner components, top plates, and caps so everything at the top plate matches. Mixing brands at the top plate is one of the most common sources of leaks and draft loss in a lined chimney. Aftermarket caps and dampers are fine when they match the flue OD and are rated for the liner’s alloy. Where the liner itself is compromised, we’ll tell you plainly, because patching a stainless flex liner usually isn’t a real fix.
See the difference
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After
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After
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AfterDuraFlex Service Pricing in Gunbarrel
What you’ll pay depends on what we find. A standard sweep and Level 2 inspection on a DuraFlex-lined fireplace is the starting point. From there, a cap or top-plate replacement sits at the lower end, and creosote removal or clearance corrections add cost. Insulated liner work is the largest line item, and it only comes up if the liner itself is compromised. Every estimate is free, in writing, and agreed before we book the work. If something can safely wait, we say so.
Serving Gunbarrel, CO – Our Local Coverage Area
We serve Gunbarrel and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs – DuraFlex Chimney Cleaning in Gunbarrel
No. Gunbarrel is unincorporated Boulder County, outside Boulder city limits, so the city’s no-burn ordinance does not apply here by default. County-level permitting and rules apply instead. If you’re unsure what your fireplace falls under, ask the county before you burn.
It depends on what a Level 2 inspection finds. A 1990s liner can still be serviceable, but wear points like joint integrity, insulation wrap condition, and top-plate corrosion need to be checked before you rely on it. We inspect, document what we see, and tell you whether it’s safe to burn or needs work. Call (855) 632-3564 for a free estimate.
Chinook downdrafts along the foothills edge push smoke back down a flue that isn’t breathing properly. A loose or corroded top plate, a mismatched cap, or a liner that isn’t fully seated at the top plate can all cause it. Draft-improving caps and top-sealing dampers often resolve it. Call (855) 632-3564 and we’ll come out and diagnose it.
Yes. Insulated double-wall liners inside original clay-tile chases are common in Gunbarrel, and servicing them means checking the wrap, the top plate, and the clearances. We inspect with camera evidence so you can see what we see. Call (855) 632-3564 for a free estimate.
Once a year, on average, and more often if you burn heavily through the winter. Gunbarrel’s longer burn seasons load creosote faster than a lightly used fireplace, so annual inspection is the baseline. Call (855) 632-3564 to book a sweep.
Service Areas Near Gunbarrel
We also serve homeowners in Longmont, Fort Collins, Greeley, Dacono, Lochbuie, and Erie. If you’re nearby and want to know whether we cover your area, call us.
Book Your DuraFlex Service in Gunbarrel Today
Whether you need a Level 2 inspection, a cap replacement, or creosote removal on a DuraFlex liner, we’ll give you a straight answer and a written estimate. Call (855) 632-3564 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by the team at Chimney Sweep Greeley.