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 Claremont, CA | Lantern Chimney Sweep
We clean and repair DuraFlex chimney systems across Claremont, from original clay-tile flues in Craftsman homes near the Village to direct-vent gas systems in mid-century ranch houses. If you need Claremont Chimney Sweep services, we’re your local specialists. What makes our DuraFlex work different here is simple: we know these systems fail differently in Claremont’s dry heat and Santa Ana winds than they do in coastal towns. If you need an independent DuraFlex specialist in 91711, call (855) 341-8132 for a free estimate.
We’re not affiliated with or authorized by DuraFlex. We’re an independent service provider who’s worked on their liners, caps, and direct-vent systems for years. That independence means we tell you straight what needs fixing and what can wait. See our DuraFlex sales & service page for the full scope of what we handle.
Why Claremont Residents Choose Us for DuraFlex Service
Most chimney companies in this area can sweep. Fewer can walk up to a DuraFlex liner, spot a crimped seam or sagging section, and know whether it’s repairable or needs replacement. Our crews work on these systems weekly across Claremont and the Pomona Valley. Len Castorena grew up in Lincoln Park and spent nearly three decades on chimneys and fireplaces from Pomona to Claremont, learning HVAC and building systems at Mt. San Antonio College before shifting entirely to chimney work. That background comes out when we’re diagnosing draft problems or explaining why a liner failed in one spot and not another.
We stock OEM DuraFlex replacement liners, caps, and gaskets. When a component’s discontinued, we verify an aftermarket part fits before we install it. No guessing. Professionals in Claremont call us when they need Claremont service area coverage that includes repair, not just sweeping.
Styles & brands we work with





Common DuraFlex Chimney Cleaning Problems We Solve in Claremont
- Stainless liner seams loosening after low-use years. Claremont’s mild winters mean many fireplaces sit idle for months. Seams and joints on DuraFlex stainless liners can loosen or corrode in that dry, low-use state. We find gaps that let creosote and debris collect behind the liner, which cleaning alone won’t fix.
- Birds and squirrels nesting under missing or damaged caps. The dry, windy climate here pushes animals into any opening. DuraFlex caps on uncapped or poorly capped brick chimneys become entry points. We remove nests, check the liner, and install the right cap so it doesn’t happen again.
- Crimped or sagging flexible liner sections. Older Claremont homes often have clay-tile flues with offset or deteriorating mortar. DuraFlex flexible sections can sag or crimp when installed through those tight, rough transitions. That reduces draft and traps soot in ways a basic sweep will never resolve.
- Deteriorated gaskets on ReliaGlo direct-vent systems. Mid-century homes near the Claremont Colleges frequently have DuraFlex ReliaGlo gas fireplaces. Gaskets deteriorate, and blocked intake or exhaust from pest intrusion leads to incomplete combustion and soot buildup we see during cleaning calls.
- Cracked mortar crowns above uncapped flues. Santa Ana winds and decades of dry heat crack mortar crowns on brick chimneys. Water gets in, then animals. By the time someone calls for a cleaning, there’s often debris and nesting material down the flue.
DuraFlex Service in Claremont: What Local Conditions Mean for Your Equipment
Claremont sits at the foot of the San Gabriel Mountains where the air is dry and the Santa Anas blow hard in fall and winter. That combination dries out mortar, cracks crowns, and gives pests easy access to uncapped flues. Since fireplace use is low for most of the year, homeowners don’t notice until a cold snap hits and they’re starting the first fire of the season. We work on a lot of original brick chimneys in the older neighborhoods off Indian Hill Boulevard and near the Claremont Colleges, and we offer DuraFlex repair in Upland as well. Those homes have clay-tile flues, and their DuraFlex liners often run through compromised mortar that’s gone unchecked for years. A pre-season Level 2 inspection catches water damage and pest entry before a fire makes things worse.
On a 1950s ranch home near the Claremont Village, our crew arrived for a routine sweep and found the DuraFlex cap missing and the stainless liner crimped from a previous installation. After removing a bird nest and debris, we re-secured the liner, installed a new DuraFlex multi-flue cap, and repointed cracked mortar at the crown. The draft came back before the first cold night.
DuraFlex Models & Products We Service in Claremont
We service DuraFlex Stainless Steel Liner Kits for masonry chimneys, 6-inch and 8-inch flexible chimney liners, ReliaGlo direct-vent gas fireplace systems, and Universal Chimney Caps. When a liner section is structurally sound, we repair it. When it’s cracked or the cap’s gone, replacement with an OEM DuraFlex part is usually the safer long-term fix. We keep common liner sizes, caps, and gaskets stocked for faster turnaround on Claremont jobs. If a component’s discontinued, we source a compatible aftermarket part and confirm fit before installation.
See the difference
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AfterDuraFlex Service Pricing in Claremont
DuraFlex chimney cleaning in Claremont typically runs $180 to $340 depending on liner condition, access, and whether pest removal is involved. Replacing a missing cap adds $80 to $200 for the part and installation. If we find a crimped liner or deteriorated gaskets, repair pricing depends on what’s actually wrong. Every job starts with a free estimate, and we show you photos from the camera inspection before recommending anything. We don’t recommend a repair unless we can show you why it’s needed. Call (855) 341-8132 for an exact quote on your DuraFlex system.
Serving Claremont, CA — Our Local Coverage Area
We’re based in the Claremont area and know this community well, and we also provide DuraFlex service in La Verne. Use the map below to see our full service coverage — if you’re nearby, we can almost certainly help.
FAQs – DuraFlex Chimney Cleaning in Claremont
We recommend a Level 2 inspection every 12 to 24 months even if you rarely burn, because dry heat and Santa Ana winds crack mortar and let pests into flues that sit unused most of the year. An inspection catches damage before you light the season’s first fire. Call (855) 341-8132 to schedule yours.
Birds and squirrels target uncapped or damaged caps because Claremont’s dry, windy conditions make chimney openings an attractive shelter. The fix is a properly fitted DuraFlex cap with intact spark arrestor mesh, installed after the flue is cleared and inspected. If you’re cleaning nests out every fall, the cap likely needs replacement.
In most cases, yes. A DuraFlex stainless liner can bypass a cracked clay-tile flue entirely, restoring safe draft and containing combustion gases without masonry reconstruction. We assess the existing flue dimensions and condition first, then spec the correct liner size. This is a common fix for older Claremont homes. Call (855) 341-8132 for a free estimate.
Soot buildup around the glass, a weak or flickering flame, unusual odors, or a pilot that won’t stay lit point to gasket deterioration or blocked intake/exhaust, often from pest intrusion in Claremont. We clean the system, check gaskets, and clear the venting. Ignoring these signs can lead to incomplete combustion and carbon monoxide risk.
Occasional quakes and constant dry heat stress the surrounding masonry, which can shift and put pressure on flexible liners. You may see crimping, sagging, or loosened connections. An inspection after any noticeable quake is worth it if you plan to burn. Call (855) 341-8132 and we’ll check the liner and surrounding mortar.
Service Areas Near Claremont
We serve Claremont and nearby Pomona, La Verne, Montclair, Chino, and Ontario. If you’re in Montclair, see our DuraFlex service in Montclair page. In Chino, our DuraFlex service in Chino page has local details.
Book Your DuraFlex Service in Claremont Today
If your DuraFlex system needs cleaning, inspection, or repair in Claremont, or you need DuraFlex service in San Antonio Heights, call (855) 341-8132. We’ll set a free estimate and give you an honest read on what your chimney actually needs. A clean chimney is a quiet chimney, and quiet is exactly what you want.
Written by Len Castorena, Owner at Lantern Chimney Sweep, serving Claremont and the Pomona Valley.