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 Longmont, CO
We provide independent DuraFlex service across Longmont, from flexible stainless relining work in Old Town brick chimneys to cap, tee and connector repair on factory-built flues out east. What sets our DuraFlex work apart here is that Longmont asks one technician to handle two completely different jobs: century-old masonry with clay tile in one part of town, and prefab metal chimney systems in the other. DuraFlex components show up in both, and they fail in different ways in each.
We’re an independent shop, not affiliated with or authorized by the manufacturer, and our credibility comes from hands-on familiarity with the brand’s insulating wraps, tee and cap assemblies and appliance-connector kits. To book a DuraFlex sweep, Level 2 inspection or repair in Longmont, call (855) 632-3564. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Why Longmont Residents Choose Us for DuraFlex Service
Our technicians have up to 13 years of experience, and every one of them works in chimneys only. That matters with a brand like DuraFlex, where the differences between a job that lasts and one that doesn’t live in the details: whether the insulation wrap was sized and seated correctly, whether the tee branches line up with the appliance collar, whether the cap clears the flue the way the system needs.
We know the DuraFlex DuraFlex product range well enough to tell you which component on your chimney is actually the problem before anyone quotes a full reline. That’s the practical benefit of working on one brand family week in and week out across a city with two very different housing realities.
When you call, we look at what you have. Brick chimney with clay tile? Prefab metal flue? Wood insert, gas insert, or an open fireplace? The answers change the scope of the visit, and we’d rather sort that out on the phone than surprise you on the day. We serve all of Longmont, from the Old Town core out to the newer subdivisions, and the estimate is always free.
Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Common DuraFlex Chimney Cleaning Problems We Solve in Longmont
These are the DuraFlex issues that come up most often in Longmont homes, and what causes them here.
- Degraded or shifted insulation wrap on flexible liners. Years of service inside an Old Town masonry chimney, plus the thermal swings from Front Range chinook downslopes, can leave a DuraFlex liner under-protected. When the wrap shifts, the liner runs hotter than it should and the whole system gets less forgiving.
- Failed cap and tee joints on prefab metal flues. Out in the 80504 subdivisions, this is the usual leak and draft-failure point rather than the flue tile. Freeze-thaw cycling at the joint works these connections loose and opens them to water and downdraft.
- Liner-to-appliance connector corrosion and gasket breakdown. On DuraFlex relines serving wood inserts, the connector is where the heat and the acids land hardest. We sometimes find this only after an insert was fitted into an original masonry fireplace without proper liner verification first.
- Glazed third-degree creosote bonded to the smooth wall. Long shoulder-season idle periods give last winter’s creosote time to harden into a glazed deposit that resists standard poly brushes. That has to come off before the DuraFlex liner can be recertified.
- Wood stoves retrofitted without any proper liner at all. Pulling the damper in an older Longmont fireplace occasionally reveals mismatched flue tile or vented gas behind it, a code surprise that changes the scope of the visit entirely.
DuraFlex Service in Longmont: What Local Conditions Mean for Your Equipment
Longmont’s two-chimney reality is the single most useful thing to understand about your DuraFlex system. In Old Town, around the historic downtown core in 80501, brick and Victorian homes carry original masonry chimneys with clay tile or no liner at all. Out east and northeast, the subdivisions in 80504 mostly run gas inserts and factory-built metal flues. A DuraFlex flexible stainless liner belongs in the first case; the factory-built components and caps belong in the second. Serving one while certifying the other means two sets of tooling and two skill sets, and a technician who only does masonry will misread a prefab flue every time.
Add the climate on top. Fierce chinook downslopes can swing temperatures 50 degrees in a day, which spalls mortar crowns and chimney caps faster than in milder places. That’s hard on caps and tee joints. The long idle stretch between burning seasons is just as hard on the inside of the flue.
DuraFlex Models & Products We Service in Longmont
Our DuraFlex work in Longmont covers smooth-wall stainless relining kits, single-wall flexible liner, insulated flexible liner systems for wood inserts, and the factory-built chimney components and caps used on prefab metal flues. On the service side that means sweeps, Level 2 inspections, creosote removal, cap replacement, connector work and relining when the liner itself has reached the end.
Parts matter. We size OEM or OEM-equivalent components to the appliance and the flue, because mixing a generic cap or wrap onto a DuraFlex system compromises its listing and its draft performance. When a liner is sound but its cap, tee or connector is failing, targeted repair beats a full reline. Once the stainless has corroded through or the wrap is gone, replacement is the honest call, and we’ll show you why.
See the difference
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After
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After
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AfterDuraFlex Service Pricing in Longmont
Costs depend on what’s actually there: the chimney type, liner condition, whether wrap or a cap or a connector needs replacing, and how much creosote has bonded inside. The written estimate you receive sets the final price, and there’s no charge for that estimate.
- Standard chimney sweep with a visual check: typical range $180 to $340
- Level 2 inspection with camera and photo report: typical range $250 to $450
- Cap or connector replacement: quoted per job after inspection
- DuraFlex flexible reline with insulation wrap: quoted per job after inspection
Nothing gets recommended without camera evidence you can see for yourself, and we say plainly when work can safely wait. Call (855) 632-3564 for an exact quote on DuraFlex service in Longmont.
Serving Longmont, CO – Our Local Coverage Area
We serve Longmont 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 Longmont
Often, yes. A flexible stainless liner is the standard fix when original clay tile is cracked, spalled or missing, because it gives the flue a continuous, correctly sized path for the smoke. The deciding factor is what a Level 2 inspection finds inside that clay tile. Call (855) 632-3564 to get an inspection booked.
Because of the freeze-thaw cycling. Chinook downslopes push temperatures through repeated 50-degree swings, and every one of those cycles works the cap and tee joints a little looser. These prefab systems fail at the joint and the cap, not at the flue tile. A failed cap is a quick, targeted fix when it’s caught early.
Usually not. Third-degree glazed creosote bonds to the stainless and resists poly brushes, so it needs specialized removal before the liner can be recertified. Standard sweeping clears the loose stuff; glazed deposits are a separate job. Call (855) 632-3564 and we’ll tell you which one you’re looking at.
It catches what’s hidden: the full length of the liner, the condition of the insulation wrap, the tee and connector joints, and anything unexpected behind the damper. A Level 1 is a visual check of what’s reachable. For a reline in an older Longmont home, that hidden view is the whole point, and it’s why we treat Level 2 as the realistic starting point on pre-1940s masonry.
No. When the stainless liner is sound and only the cap, tee or connector is failing, targeted repair beats replacement and costs a fraction of a reline. Replacement becomes the honest recommendation when the stainless has corroded through or the wrap is gone. Call (855) 632-3564 for a free estimate and we’ll show you which case you’re in.
Service Areas Near Longmont
We handle DuraFlex service in Longmont and the towns around it, including Niwot to the northwest and Erie to the southeast, plus Dacono, Lochbuie, Greeley and Fort Collins. If you’re just outside the city limits, call and we’ll tell you what’s available for your address. The housing stock shifts street by street out here, and so does the right fix.
One thing holds true across the whole area: a routine sweep sometimes turns into a bigger conversation. In a century-old Old Town brick home, the technician pulls the damper and finds a wood stove fitted without a proper stainless liner and mismatched flue tile behind it, so the sweep becomes a Level 2 inspection and a reline quote built around a DuraFlex flexible liner with insulation wrap. Out in the 80504 subdivisions, the same call often ends with a prefab flue whose cap or tee joint has failed, and the fix is a cap or connector replacement rather than a new flue. We do Niwot and Erie the same way.
Book Your DuraFlex Service in Longmont Today
Whether you need a sweep, a Level 2 inspection, creosote removal, a cap replacement or a full DuraFlex reline, we’ll assess your chimney, show you the evidence, and quote the work honestly. Estimates are free. Call (855) 632-3564 to book DuraFlex service in Longmont. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by the team at Chimney Sweep Greeley.