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 Crestline, CA | Corona Chimney Sweep
We provide independent DuraFlex chimney cleaning, inspection, and repair across Crestline, from the Lake Gregory shoreline up to the Cedar Ridge lots, and we also offer Lake Arrowhead DuraFlex service nearby. The thing that makes our DuraFlex work different here is simple: Crestline’s elevation-driven burn pattern – cold flues, snow events, then hard hot restarts – glazes liners in ways most sweep crews never see down the hill. Call (855) 382-6159 for a free estimate, and we’ll show you exactly what’s inside your flue before we touch it.
Why Crestline Residents Choose Us for DuraFlex Service
We’ve cleaned, inspected, and rebuilt hundreds of DuraFlex stainless relining systems in the San Bernardino Mountains and provide DuraFlex in San Bernardino proper as well, so we know how their twist-lock joints and cap assemblies hold up to Crestline’s freeze-thaw winters. That’s not a manufacturer talking point. Nolan Ferris, our owner, grew up in South Corona where the mechanics of combustion systems were his trade school classroom, and he’s spent well over a decade pulling apart chimneys across the Inland Empire and the mountain communities. As an independent shop, we service DuraFlex on its own merits. We call out failed components honestly rather than steering you toward a brand we’re tied to.
When Crestline homeowners call us about a DuraFlex liner, they usually already suspect something’s wrong. A cap that rattles. A draft that pulls cold air down the stairs. Creosote flakes on the hearth. We don’t show up with a brush and a sales pitch. We show up with a camera and a Level 2 inspection protocol. DuraFlex sales & service is what we do, but the inspection comes first, every time.
For full coverage details across the mountain and beyond, see our Crestline service area page. You’ll find the same straight-talking approach, whether you’re on a steep lot above the lake or a flat street near the post office.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Solve in Crestline
- Twist-lock and band-clamp joints loosening after heat cycling. Every fire heats the liner, every cold night contracts it. In Crestline, where a cabin might see a 40-degree swing between a hot burn and a cold mountain night, those joints work loose faster than they would in a mild climate. A separated joint lets creosote and moisture behind the liner, where you can’t see it until the smell starts.
- Stainless flexible liner corrosion and pinholes. DuraFlex stainless is good metal. But Crestline’s damp, snow-heavy winters mean a flue that sits cold between burns will collect condensation, and condensation attacking stainless over years produces pinholes that leak combustion gases into the chase. We see this most often in part-time cabins that get fired only on weekends all winter.
- Seized top caps and clogged multi-flue screens. Pine needles don’t politely fall off your roof. They pile onto the cap, mix with snow and ice, and pack the screen solid. A clogged cap kills your draft and forces smoke back into the house. On older Crestline cabins with low-slope roofs, this is one of the most common problems we find.
- Stage-three glazed creosote bonded to insulated flex liners. This one’s a Crestline specialty. The cold-start, hot-burn pattern glazes deposits into a hard, tar-like layer that a standard brush skips right over. On DuraFlex insulated liners, the insulation keeps the inner wall cooler longer, which actually encourages condensation and glazing in the first place.
- Misaligned elbows and tees after snow-driven roof movement. Heavy snow loads put stress on the chimney chase and the liner connections inside it. In old Crestline cabins, a slight roof sag can throw a tee slightly out of alignment just enough to create a bypass. We re-seat those connections and verify the entire run with the camera before declaring it clean.
DuraFlex Service in Crestline: What Local Conditions Mean for Your Equipment
Because Crestline cabins at roughly 4,600 feet often sit unburned through snow events and then get fired hard, we routinely find stage-three glazed creosote fused to DuraFlex insulated liners in homes that only burn part-time. This is the deposits a routine brush-and-vacuum sweep leaves behind. Let’s be specific about what that means. You get three feet of snow on a Tuesday. The cabin sits cold until Saturday. Saturday evening, you fire the stove hot because it’s 28 degrees inside. The cold flue walls flash-heat, the creosote from your last few fall burns doesn’t flake off, it liquifies and bakes into a glassy, hard shell. That’s stage three. It won’t brush out. It has to be chemically treated with a creosote remover that attacks the glaze before re-sweeping, and on DuraFlex insulated liners, we use a treatment that’s safe for stainless. A generic chimney cleaning in Crestline that skips this step leaves a liner that looks clean but is still carrying fire fuel on its walls.
DuraFlex Models & Products We Service in Crestline
We work on the full DuraFlex line that shows up in Crestline homes. The SW (Sure-Wrap) flexible stainless relining kits, which we see most often in masonry fireplaces. The Pro and ProFlex stainless flexible liner, common in wood stove retrofit installs. The pre-insulated Insulated Flex for masonry chimneys where clearance matters. And the rigid stainless liner sections with elbows and tees, which turn up in taller, straighter runs where flexibility isn’t needed.
Parts approach: we use DuraFlex OEM components – liners, caps, tees, connectors – wherever fit and safety matter. For non-critical hardware, a quality aftermarket piece sometimes does the job better or is the only option when DuraFlex has discontinued something. We’ll tell you which is which and why. We stock common DuraFlex parts for quick Crestline and Highland DuraFlex service turnaround, so a cap replacement or joint repair doesn’t wait on a distributor.
See the difference
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AfterDuraFlex Service Pricing in Crestline
A standard DuraFlex chimney cleaning in Crestline typically runs $189 to $329 depending on liner condition, accessibility, and whether we’re chemically treating glazed creosote. A Level 2 inspection – which we recommend for any cabin that sat through a full winter without a cleaning – runs $199 to $399. Cap replacement varies widely depending on the cap and the liner size, but most Crestline jobs land between $250 and $600 installed. None of these numbers are guesses. They’re based on what we see on this mountain. The variables that drive cost here are steep-roof access, how hard the flue is to reach, and how much chemical treatment the glazing requires. Call (855) 382-6159 for an exact quote. Estimates are free, and we put the number in writing before any work starts.
Serving Crestline, CA — Our Local Coverage Area
We’re based in the Crestline area and know this community well, and we handle DuraFlex repair in Muscoy too. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – DuraFlex Chimney Cleaning in Crestline
Every 30 to 40 burns, which for most Crestline homeowners means once a year, ideally in late September or early October before the first real cold snap. If you burn green pine or fire your cabin only on weekends, you may need it twice a season because the cold-start pattern builds deposits faster. Call (855) 382-6159 and we’ll set a schedule that matches how you actually burn.
No, and we won’t pretend otherwise. Glazed stage-three creosote laughs at a standard brush. It requires a chemical treatment that breaks down the hardened deposits, followed by a re-sweep and a camera verification. We do this on DuraFlex liners all winter long in Crestline, including insulated flex, with products that won’t eat the stainless. Call (855) 382-6159 and we’ll tell you honestly whether you’re looking at a chemical clean or a standard sweep.
Yes. We run a Level 2 camera inspection on request, and for Crestline cabins that sat through part of a winter without burning, we recommend it because cold-seated joints shift. The camera shows us exactly what’s happening at the twist-lock connection behind the faceplate and at the tee. No guesswork. Call (855) 382-6159 to book an inspection before the first snow.
It can, and in Crestline it does more damage than most people realize. Snow and needles pack the cap screen, stall your draft, and force moisture down onto the liner and crown. Over one winter, a clogged cap can accelerate corrosion on the top section of your liner. We replace caps and cap screens on DuraFlex systems regularly up here, usually with the OEM part. Call (855) 382-6159 and we’ll take a look before the next storm loads your roof.
Depends on what the camera finds. A 1970s cabin with the original clay tile liner and minor flaking might only need HeatShield resurfacing, which we do in-house. If the clay tiles are cracked, separated, or sized wrong for a wood stove, a DuraFlex stainless reline is usually the code-compliant fix. We’ll recommend repair over replacement when the liner and joints pass inspection, and only push a full reline when corrosion or separation makes the existing system unsafe. Call (855) 382-6159 and we’ll explain what we’re seeing in plain English.
Service Areas Near Crestline
From our base in Corona, we also serve DuraFlex service in Murrieta, DuraFlex service in South El Monte, plus Home Gardens, Norco, Eastvale, and Jurupa Valley. If you’re on the mountain or down the hill, the same crew and the same DuraFlex expertise covers it.
On a wooded lot off the Lake Gregory area, our crew opened up a 1970s cabin whose DuraFlex insulated liner had glazed so hard that the standard brush skipped across it. We ran a chemical creosote treatment before re-sweeping. The twist-lock joint at the tee had separated, and the multi-flue cap was clogged with pine needles, so we re-seated the joint and fitted a new cap. Our Level 2 inspection caught a hairline crack in the firebox brick before it became a fire risk. We fixed all of it in one visit, one provider, every venting hazard.
Book Your DuraFlex Service in Crestline Today
If you can’t see daylight through the damper, we need to talk before you light that first fire of the season. Call (855) 382-6159 for a free estimate on DuraFlex cleaning, inspection, or repair in Crestline. We book in advance, and fall slots fill fast up here.
Written by Nolan Ferris, Owner at Corona Chimney Sweep, serving Crestline and the San Bernardino Mountains.