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 Universal City, CA | Ashwood Chimney Sweep
We provide Universal City Chimney Sweep services for independent DuraFlex chimney and flue cleaning across the 91608 ZIP, handling everything from rooftop boiler flues to commercial kitchen exhaust hoods at CityWalk and the studio concessions. The one thing that makes our DuraFlex work here different: we service these systems under NFPA 96 grease-duct schedules and LA Fire Department clearances, not just annual fireplace maintenance. If you’ve got a DuraFlex liner, cap, or chase system that needs cleaning, inspection, or repair, call Ashwood Chimney Sweep at (833) 805-3229 for a free estimate.
Why Universal City Residents Choose Us for DuraFlex Service
Most chimney companies in the LA area are set up for residential fireplaces. That’s fine for a hillside home above the Boulevard, but it doesn’t help a restaurant operator at CityWalk whose kitchen exhaust flue is coated in hardened grease and failing a fire-code inspection. We’ve worked on DuraFlex systems in both settings, including DuraFlex in Hollywood area properties, and we know the difference between a liner that needs a rotary cleaning and one that needs section replacement because of corrosion from kitchen exhaust acids.
Norm Castillo, our owner, came up through HVAC and building systems training before narrowing his focus entirely to chimneys, flues, and venting systems. For close to two decades he’s been the guy commercial property managers and hillside homeowners call when a flue hasn’t been touched in years and nobody can figure out why it’s drafting wrong. We’re an independent service provider. We don’t sell DuraFlex, so we don’t have a reason to push a liner replacement when a thorough cleaning and a cap screen replacement would get the system back in compliance. Our loyalty is to the flue’s performance and the fire code, not a product line.
Styles & brands we work with
Common DuraFlex Chimney Cleaning Problems We Solve in Universal City
- Glazed creosote and carbon buildup on liners serving restaurant hoods at CityWalk. Kitchen exhaust grease bakes onto the DuraFlex liner walls and hardens into a glaze that a standard brush won’t touch. This requires rotary cleaning with aggressive tooling, and it’s the single most common problem we see in Universal City’s 91608 ZIP, where commercial food-service flues outnumber residential fireplaces by a wide margin. Left alone, glazed creosote narrows the flue diameter and raises exhaust temperatures to a point where the liner itself becomes the fire risk.
- Corrosion of stainless steel liner joints and caps from kitchen exhaust acids and moisture. Rooftop flues above the theme park and studio commissaries sit exposed to a year-round cycle of warm, dry days and cool, damp nights. Kitchen exhaust carries acids and moisture that condense on the liner walls, eating at the stainless joints and cap seams. A DuraFlex liner that looks fine from the ground can be paper-thin at the connection points once we get on the roof and actually look.
- Failed spark arrestors and cap screens clogged with grease and debris. Universal City sits in a fire-prone zone with Santa Ana winds, so a functioning spark arrestor isn’t optional. Grease from kitchen exhaust coats the screen mesh, and once it solidifies, it blocks airflow and creates the exact draft problem that drives smoke back into the kitchen. For hillside homes above the Boulevard, a clogged arrestor screen is a brush-fire hazard waiting for the right wind event.
- Separation of liner sections or top-plate seals in high-vibration commercial kitchen exhaust systems. Big kitchen exhaust fans shake. That vibration, day after day, loosens the connections between DuraFlex liner sections and the top plate seals at the termination. Once a section separates, grease leaks into the chase space instead of going out the flue. That’s a fire-code violation under NFPA 96 and a grease fire waiting to happen in a way nobody sees until inspection fails.
- Draft issues from a combination of all the above. Universal City commercial kitchens rarely fail because of one problem. It’s usually glazed creosote narrowing the flue, a clogged arrestor screen on top, and a partially separated joint in between. We fix the full stack, not just the part that was noticed first. A clean flue isn’t a luxury; it’s just the job done right.
DuraFlex Service in Universal City: What Local Conditions Mean for Your Equipment
Universal City’s 91608 ZIP is essentially the Universal Studios Hollywood resort, CityWalk, and the surrounding studio and office complexes, with scattered hillside residences on the fringes. There’s almost no traditional single-family housing here. So when someone in Universal City needs DuraFlex repair in Studio City or nearby, they’re usually not asking about a wood-burning fireplace that gets lit four times a winter. They’re asking about a commercial kitchen exhaust hood that runs 12 hours a day, seven days a week, and is subject to NFPA 96 inspection schedules and LA Fire Department clearances. That changes the cleaning conversation entirely: frequency is measured in months, not years; the buildup is grease, not creosote; and the pass/fail standard is a fire-code clearance, not an annual recommendation. If you manage a food-service venue or entertainment facility in Universal City, you don’t need a sweep-and-go contractor. You need someone who can clean to the standard LAFD will accept on the day they show up. That’s the standard we work to.
We were called to a CityWalk restaurant where the kitchen exhaust had been struggling for weeks. Our tech pulled the DuraFlex cap and found the spark arrestor completely plugged with hardened grease and carbon. After a rotary cleaning of the liner and a cap screen replacement, the system passed LAFD inspection and draft was restored. That’s the difference between someone who cleans the easy parts and someone who handles the whole flue.
DuraFlex Models & Products We Service in Universal City
We work on the full DuraFlex residential and commercial lineup: the SW (single-wall) flexible stovepipe, the Pro (double-wall) flexible liner, the DuraPlus factory-built chimney system, and the DuraTech poly-lined insulated flexible chimney liner. For commercial kitchen exhaust in Universal City, DuraPlus and Pro liners are the ones we see most often on rooftops, while hillside homes above the Boulevard tend toward SW and DuraTech — similar to what we see with North Hollywood DuraFlex service calls.
On parts, our stance is straightforward: we use OEM DuraFlex components for critical connections like top plates and caps when they’re available, because that’s what the system was designed around. But we also stock quality aftermarket parts that meet or exceed UL 103/1777 standards for commercial grease ducts, so we’re not waiting on a manufacturer shipment when a CityWalk kitchen is down. If the liner integrity is sound, we repair first, re-sealing joints or replacing individual sections. If corrosion or grease penetration has compromised the system, we’ll tell you plainly that full replacement is the only correct fix, and we’ll quote it that way.
See the difference
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AfterDuraFlex Service Pricing in Universal City
DuraFlex chimney cleaning in Universal City typically runs $250 to $450 for a standard commercial hood exhaust cleaning, and $450 to $900 when glazed grease requires rotary cleaning with aggressive tooling. Cap screen and spark arrestor replacement usually adds $120 to $250, depending on the cap size and whether we’re dealing with OEM or aftermarket parts. Liner section repair or re-sealing can range from $300 to $800, and full liner replacement in Universal City’s commercial settings starts around $2,500 and goes up from there based on flue height, access, and whether we’re working on a flat commercial rooftop or a sloped hillside residential chase.
What drives cost here specifically: rooftop access, NFPA 96 documentation requirements, and the degree of grease glazing. A free estimate includes a full inspection of the flue, cap, and liner condition, plus a written quote for exactly what needs doing and what can safely wait. Call (833) 805-3229 and we’ll get you a number before any work starts.
Serving Universal City, CA — Our Local Coverage Area
We’re based in the Universal City area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – DuraFlex Chimney Cleaning in Universal City
Monthly for high-volume solid-fuel cooking, quarterly for typical high-volume commercial kitchens, and semi-annually for moderate-volume operations. The exact schedule depends on your cooking volume and fuel type, and LAFD will have it documented. If you’re not sure where you fall, our inspection will tell you, and we’ll put you on a schedule that keeps you clear of code violations. Call (833) 805-3229 to get on the calendar.
Yes. Rooftop boiler flues are routine for us in Universal City. The working conditions are different: wind exposure, high-temperature cycling, and corrosion from combustion byproducts that condense in the flue. We inspect the liner integrity, clean any carbon or scale buildup, and replace sections or caps as needed. Access is often via roof hatch or ladder, and we’re set up for that.
The buildup. A home fireplace produces dry creosote from wood smoke. A restaurant hood flue produces grease-laden vapor that condenses into a thick, glazed, sometimes corrosive coating. The tooling is different: rotary cleaning with aggressive blades and chains for grease, versus brushes and rods for residential creosote. The inspection standards are different too. Commercial flues answer to NFPA 96 and LAFD, while residential flues fall under NFPA 211. We service both in Universal City, and we don’t treat one like the other.
Yes. Hillside homes above the Boulevard sit in brush-zone wildfire territory, and a functioning, code-compliant spark arrestor is a requirement, not a suggestion. We install cap screens and arrestors that meet LA County and LAFD standards for spark capture and airflow, sized to your specific DuraFlex termination. If yours is clogged, corroded, or missing entirely, that’s a fix we can usually handle same-day on the initial visit. Call (833) 805-3229 for a free estimate.
Carefully and quietly, with containment equipment so the work doesn’t disrupt office tenants or production schedules. We use negative-pressure vacuum systems and ground-floor or rooftop capture points to keep grease and debris outside the occupied space. Universal City’s studio and office buildings run tight schedules, so we coordinate access windows in advance and complete the work in one visit wherever possible.
Service Areas Near Universal City
In addition to Universal City’s 91608 ZIP, we service hillside homes and commercial properties in neighboring areas including DuraFlex service in West Hollywood, DuraFlex service in View Park-Windsor Hills, Studio City, Burbank, and the Hollywood Hills. Our Universal City service area coverage extends across the commercial core and the residential slopes. For more on our full DuraFlex capabilities, see our DuraFlex sales & service page.
Book Your DuraFlex Service in Universal City Today
If your commercial kitchen flue is overdue for NFPA 96 cleaning or your hillside home’s DuraFlex liner needs inspection before the next fire season, call Ashwood Chimney Sweep at (833) 805-3229. We’ll schedule your free estimate, get on the roof or into the chase, and tell you exactly what your flue needs, with a written quote before any work starts. Universal City’s fire season doesn’t wait, and neither should your flue maintenance.
Written by Norm Castillo, Owner at Ashwood Chimney Sweep, serving Universal City and the surrounding LA area since 2006.