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.
Why Fontana Homeowners Choose DuraFlex Chimney Cleaning
We provide DuraFlex in Fontana: chimney cleaning, inspection, and repair, and we’ve worked on enough of these systems to know exactly where they fail. DuraFlex stainless flex liners and Galvalume prefab pipe are well-built products, but Fontana’s heat cycling, long idle stretches during AQMD no-burn days, and decades-old installs create specific problems that a generic sweep misses. We run Level 2 camera inspections on every DuraFlex service call, not just a brush-and-go. Call us at (833) 805-3229 for a free estimate.
We’re an independent DuraFlex service provider, not a manufacturer dealer or authorized warranty agent. That matters because we diagnose what’s actually wrong with your liner, firebox, or cap without steering you toward a particular product line. We stock OEM-matched DuraFlex components and quality stainless aftermarket parts, and we tell you straight when a patch is safe and when replacement is the only honest answer.
Why Trust Ashwood Chimney Sweep for Your DuraFlex Chimney Cleaning?
DuraFlex systems have quirks that only come from hands-on repair work. We’ve opened enough DuraFlex factory-built fireboxes in DuraFlex in Rialto and Fontana to know that a cracked refractory panel behind a gas log set is rarely a one-part fix. It’s usually a symptom of the firebox joints shifting through hundreds of inland heat swings, and replacing the panel without addressing the joint movement means doing the job twice.
Norm Castillo started this company after years of chasing chimney and venting problems across the Inland Empire, and he trained his crew to treat every DuraFlex job as an inspection first and a cleaning second. His background in HVAC and building systems from his Chaffey College days means we look at the whole drafting system, not just the flue walls. Our techs know which DuraFlex slip joints tend to separate on Fontana’s older tract homes, where Galvalume cap seams corrode first, and what a glazed Stage 3 creosote band on a flex liner actually feels like under rotary tooling. That kind of knowledge doesn’t come from a manufacturer brochure.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Fix in Fontana
- Glazed Stage 3 creosote on stainless flex liners. DuraFlex stainless flex liner kits used with wood inserts develop a hard, shiny creosote layer when fires burn low and slow during Fontana’s cold snaps, then the flue sits idle through a South Coast AQMD no-burn stretch. Standard wire brushing skates off that glaze. We use rotary tooling to break it down without scarring the corrugation, which keeps the liner’s structural integrity intact.
- Corrosion and pitting at the liner-to-cap transition. Galvalume DuraFlex pipe sections hold up well in most climates, but Fontana’s dry, hot summers followed by Santa Ana-driven cold and the rare intense winter rain produce condensation cycles at the cap seam. The galvanized coating gives way first there, and we routinely see pitting that would go unnoticed on a visual-only sweep. Our camera inspections catch that transition-zone corrosion before it eats through.
- Failed refractory panels and cracked firebox joints. DuraFlex factory-built fireplaces use refractory panels that are built to handle heat, not decades of expansion and contraction. Fontana’s temperature swings between summer highs over 100°F and winter fireplace use put real stress on those joints. We don’t just swap panels. We check the underlying joint movement and the firebox anchoring, because a new panel in a shifting box fails again.
- Loose or seized slip-joint sections. DuraFlex prefab chimney pipe locks together with slip joints that can work loose over time or seize entirely when exposed to years of heat cycling and moisture. A slightly separated slip joint lets soot and smoke weep into the chimney chase, and homeowners usually notice a faint smoky smell near the wall before they see anything else. We reseat and secure those joints, replacing sections that have deformed beyond a tight fit.
- Universal cap failures from Santa Ana wind and debris. DuraFlex Universal and multi-flue caps get hammered by Fontana’s Santa Ana winds, which drive dust and ember debris into the cap screen and spark arrestor. Clogged caps reduce draft and push smoke back into the room on windy days. We clean them, but more often than not, the mesh has pulled loose from years of wind loading and the cap needs a proper replacement with a matched DuraFlex or upgraded stainless equivalent.
DuraFlex Parts & Our Repair-vs-Replace Approach
When a DuraFlex liner is pitted but not through, we patch it if the surrounding metal is sound and the patch won’t create a future draft restriction. When it’s through, we say so. Fontana homeowners deserve a straight answer, not a scare quote. The same logic applies to refractory panels: a hairline crack in a panel that’s not load-bearing can often be stabilized, but a crack that runs corner to corner or exposes the firebox shell means replacement is the safe call. We stock OEM-matched DuraFlex liners, caps, and refractory panels for the most common Fontana installs, and we have quick access to DuraFlex in Glen Avon and nearby areas within a day or two. When OEM isn’t the right answer because a joint design has been improved or a part is discontinued, we source quality stainless aftermarket components that meet the same structural standard. Call (833) 805-3229 and we’ll give you an honest read before any money changes hands.
Our DuraFlex Service Process – Step by Step
- 1
Diagnosis. We start with a Level 2 camera inspection of the entire DuraFlex flue path, from firebox to cap. That means we see the liner wall condition, the slip-joint seams, the cap transition, and any refractory panel cracking. Photographs go into your report, so you’re not taking our word for it.
- 2
Repair or install. If the issue is glazed creosote, we break it down with rotary tooling matched to the liner diameter. If it’s a separated slip joint, we reseat and secure it. If it’s a failed panel or a corroded cap, we install the correct DuraFlex-matched or upgraded stainless part and seal the transition properly.
- 3
Test. We run a draft and smoke test to confirm the flue pulls correctly under fire conditions, not just under a flashlight. On wood-burning systems, we verify the smoke exits cleanly with no backpuffing or chase leakage.
- 4
Log and warrant. We document liner condition, cap integrity, and any repair work so the next service call doesn’t start from zero. Our workmanship carries our own warranty, and we’re clear about which components carry a manufacturer warranty and which don’t.
See the difference
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After
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After
Before
AfterDuraFlex Products We Service & Install in Fontana
We handle the full DuraFlex product range that shows up in Fontana homes: stainless steel flex liner kits, both insulated and uninsulated, used for wood inserts and gas appliance relining. Galvalume prefab chimney pipe sections on newer factory-built fireplaces. DuraFlex Universal chimney caps and multi-flue cap series, which take the worst of our wind and sun. And DuraFlex fireplace insert liner systems, which we clean, inspect, and replace when the old liner has gone. We keep common liner diameters and cap sizes on the truck, and our suppliers in the Inland Empire carry the rest for fast turnaround.
We Also Service These Brands
DuraFlex isn’t the only name we work with. We also clean and repair HeatShield chimney liner restoration systems, where a failing flue can be restored without full demolition, and Gelco chimney components, where the original cap or chase cover has given out. Fontana homes often have mixed systems, and we handle the whole flue, not just one brand’s portion of it.
FAQs – DuraFlex Chimney Cleaning Service in Fontana
Yes, with the right tooling and the right technique. Standard steel chimney brushes can catch on the corrugation of a DuraFlex stainless flex liner, especially when creosote has built up in the valleys of the ribs. We use rotary cleaning heads with poly or nylon lines that follow the corrugation profile instead of fighting it. Glazed Stage 3 creosote gets broken down with rotary tooling before any brush touches the liner wall. The goal is a clean liner without shaving metal or flattening the ribs, because that corrugation is doing structural work. If you’re in Fontana and it’s been more than a season since the last sweep, call (833) 805-3229 and we’ll assess the liner before cleaning it.
Sometimes, but not always. A hairline crack in a DuraFlex refractory panel that hasn’t separated the panel edge can often be stabilized with the right refractory cement, if the firebox joints behind it are still sound. A crack that runs corner to corner, or a panel that’s begun to crumble, means the panel has lost its structural integrity and needs replacement. The part we won’t skip is checking why it cracked. If the firebox joints are shifting from years of Fontana heat cycling, a patched or replaced panel will crack again. We give you that answer straight, with photos, before recommending any work.
On Galvalume DuraFlex cap sections in Fontana, the failure point is almost always the seam where the cap attaches to the liner or pipe. Galvalume’s coating is thinner at cut edges and seams, and our condensation cycles plus Santa Ana-driven dust and moisture settle right there. The cap mesh also takes a beating from wind-blown debris and ember grit. If your cap keeps rusting at the seam, the fix is usually a stainless replacement rather than another Galvalume cap in the same location. We stock stainless alternatives that outlast the original in Fontana’s conditions.
No, not if the fireplace hasn’t been camera-inspected in years. A Level 1 inspection is a visual check of accessible areas, and most of a DuraFlex prefab system isn’t visually accessible. The liner, slip joints, and cap transition are hidden inside the chase. For older Fontana homes with original 1970s and 1980s DuraFlex installs, we recommend a Level 2 camera inspection as the baseline, not the upgrade. It’s the only way to see what’s actually happening between the firebox and the cap before a small issue becomes a smoke leak or a chase fire.
Yes. We’re independent, so we’re not obligated to replace a failed DuraFlex liner with another DuraFlex product. If a different stainless flex liner has a better corrugation profile for your insert, or if a particular cap design fits your chase better, we’ll recommend it. The reality is that a properly sized and installed stainless liner from any reputable trade brand will perform, and the install quality matters more than the name stamped on the corrugation. We’ll show you the options and let you decide with real information.
A standard DuraFlex repair in Bloomington and Fontana typically runs between $189 and $425 for chimney cleaning, depending on what we find during the inspection. A straightforward cleaning of an accessible flex liner with light creosote sits at the lower end. Glazed Stage 3 creosote removal with rotary tooling, which is common on Fontana homes where fireplaces sat through winter no-burn days, adds labor and runs toward the upper end. Cap replacement, slip-joint reseating, or refractory panel repair are separate line items we quote before any work starts. We give you a flat price after the camera inspection, not a surprise add-on at the end. Call (833) 805-3229 for an exact quote, and the estimate is free.
Book Your DuraFlex Service in Fontana, CA
If your DuraFlex chimney hasn’t been camera-inspected in years, or you’re seeing smoke backpuffing, smelling soot near the chase, or spotting rust at the cap seam, call us. We’ll walk the system with you, show you the photos, and give you a straight answer on what needs doing now and what can wait. Reach Norm Castillo’s team at Ashwood Chimney Sweep at (833) 805-3229 for a free estimate in Fontana.
Written by Norm Castillo, Owner at Ashwood Chimney Sweep, serving Fontana since 2002.