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.
Trusted Chimney Sweep for Thornton Homeowners
Creosote builds up quietly in every wood-burning flue, and in Thornton’s cold, dry winters that glazed layer hardens faster than most homeowners expect. When it thickens, a chimney fire stops being a remote worry and starts being a real risk. Our technicians have up to 10 years of experience, and they handle cleaning, inspection, and repair in a single visit, so a cracked flue or worn damper found during the sweep gets addressed before we leave. We’re licensed and insured, and we build our work around professional-grade materials from Gelco, Olympia Chimney, and DuraFlex. Same-day service is available in Thornton when you call early. To book a sweep or ask a question, call (866) 361-5660. We answer 24/7.
Chimney Sweep Services
Chimney Sweep Services cover the full job of getting soot, creosote, and debris out of your flue and confirming the rest of the system is sound. You need them once a year if you burn wood regularly, or more often if you notice a heavy, tar-like deposit on the firebox walls. Chimney Sweep Thornton sends a technician who cleans the flue, runs a camera inspection, and hands you a photo report you can actually see for yourself. A typical sweep in Thornton runs $150-$300 depending on flue length, access, and how much buildup we find. The written estimate sets the final price, and it’s free.
What a Standard Sweep Covers
We brush the full flue run from the firebox to the cap, vacuum the firebox and smoke shelf, and check the damper, cap, and crown while we’re up there. Any loose debris or bird nests come out the same visit. You get a clear account of what we found and what, if anything, needs attention.

When Annual Cleaning Isn’t Enough
Some flues need more than brushing. Heavy glazed creosote, a flaking liner, or a spalled interior surface calls for repair work, and we handle it in-house rather than handing you off to a masonry contractor. HeatShield resurfacing or a DuraFlex liner gets specified for your flue based on what the camera shows.

Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Chimney Cleaning
Chimney Cleaning is the physical removal of soot and creosote from the flue and firebox, and it’s the part of chimney care that most directly reduces fire risk. You need it when you can smell smoke in the house after a fire, when the firebox glass clouds quickly, or when it’s simply been more than a year since the last clean. Chimney Sweep Thornton cleans with drop cloths and a sealed vacuum so nothing drifts into your living room. Pricing for chimney cleaning in Thornton typically runs $150-$300, and the written estimate confirms the number before any work starts. Our technicians have up to 10 years of experience with wood-burning and gas systems alike.
How We Keep Your Home Clean
We lay protective covers over the hearth and surrounding floor, seal the fireplace opening, and run a HEPA vacuum the whole time. Soot stays contained instead of settling on your furniture. Most homeowners tell us they can’t tell we were there except for the cleaner flue.
What We Find Inside the Flue
A camera run shows us the liner condition, joint integrity, and any offset or damage that a brush alone would miss. We show you the footage and photos. Nothing gets recommended without evidence you can look at yourself.
Fireplace Cleaning
Fireplace Cleaning goes beyond the flue to the firebox, hearth, glass, and surrounding masonry, and it’s what keeps the visible part of your fireplace matching the work we did inside it. It’s worth doing whenever the firebox is coated in soot, the glass is hazy, or the hearth has ash buildup you can’t clear with a normal cleaning. Chimney Sweep Thornton cleans the firebox interior, scrubs the doors or screen, and wipes down the surround. Fireplace cleaning in Thornton usually runs $100-$200 as part of a full service visit, and the written estimate sets the final figure. We protect the floor and furniture before we start, and we don’t leave until the area is back the way we found it.
Wood-Burning Fireboxes
Wood fireboxes collect ash, soot, and creosote flakes that fall back down the flue during a sweep. We clear all of it, check the firebrick for cracks, and inspect the damper for smooth operation. If the firebrick needs repair, we note it with photos.
Glass Doors and Screens
Glass doors take a specific cleaner and a careful hand to avoid scratching. We clean both sides where accessible and check the gasket and latch while we’re at it. A door that doesn’t seal properly affects how the fireplace drafts.
Chimney Services
Chimney Services at Chimney Sweep Thornton means sweep, repair, and dryer vent cleaning under one roof, so you’re not juggling three contractors for one system. You need the full scope when a routine sweep turns up a liner problem, a cracked crown, or a dryer vent packed with lint. We handle all of it in-house and specify materials by performance, not by what’s cheapest at the supply house. A repair found during a sweep typically runs $250-$1,200 depending on the material and the extent of the damage, and the written estimate sets the final price. Dryer vent cleaning is priced separately and quoted on site.
Repair Work Done in the Same Visit
When we find a flaking liner or a crown crack, we can quote and often complete the repair before we leave. That saves you a second appointment and a second contractor. You get one point of contact for the whole system.

Dryer Vent Cleaning as Its Own Service
Lint-packed dryer vents are one of the most underserviced fire risks in a home, and most chimney-only sweepers skip them. We clean them as a standalone service, separate from the chimney. Ask about it when you book the sweep.
Chimney Sweep Certified
Chimney Sweep Certified means the work follows the inspection and cleaning standards the chimney trade is built on, and it’s what you should expect from anyone touching your flue. You need certified-level work any time a technician is on your roof or inside your flue, because the difference between a proper job and a rushed one shows up in what gets missed. Chimney Sweep Thornton technicians work to those standards, document findings with camera footage and photos, and use materials from brands like Gelco and Olympia Chimney that professionals across the industry rely on. Pricing for certified-standard work in Thornton starts around $150-$300 for a standard sweep. The written estimate covers the rest.
Documentation You Keep
Every visit produces a written report with photos of the flue, cap, crown, and firebox. You keep a copy for your records. If you ever sell the home or file an insurance claim, that record matters.
Why Materials Matter
A repair is only as good as what goes into it. We specify DuraFlex liner systems and HeatShield resurfacing because they meet the material standards certified chimney professionals use. That’s a repair-grade solution, not a patch.
Gas Fireplace Cleaning
Gas Fireplace Cleaning covers the burners, logs or glass media, pilot assembly, and venting on a gas appliance, and it’s a different job from cleaning a wood flue. You need it annually even though there’s no creosote, because dust, spider webs, and carbon deposits can clog burner ports and affect how the flame burns. Chimney Sweep Thornton cleans the burner assembly, checks the venting for obstructions, and confirms the flame pattern looks right. Gas fireplace cleaning in Thornton generally falls in the $120-$250 range, and the written estimate confirms it. Gas work carries real safety stakes, so we check for proper venting and combustion rather than just wiping down the glass.
Burner and Pilot Care
Clogged burner ports cause uneven flames and incomplete combustion. We clear the ports, check the pilot and thermocouple, and confirm the ignition sequence works as designed. A gas smell or a lazy yellow flame is a reason to call before you use it again.
Venting and Glass
We inspect the vent run for blockages and confirm termination is clear. The glass gets cleaned with a product safe for gas appliance panels. A clean view panel makes it easy to spot a change in flame color later.
Chimney Maintenance
Chimney Maintenance is the routine care that keeps a flue safe between sweeps, and it’s the cheapest part of owning a fireplace. You need it on a yearly rhythm, ideally before burning season starts in fall, so any problem gets caught while there’s still time to schedule repair. Chimney Sweep Thornton handles maintenance visits that include a sweep, a camera inspection, a cap and crown check, and a photo report. Maintenance visits in Thornton typically run $150-$300, and the written estimate is free. Our technicians have up to 10 years of experience and can tell you plainly when work can safely wait and when it can’t.
The Fall Inspection
Before the first fire of the season, we check the cap, crown, flashing, and flue for anything that shifted over the summer. Storms and freeze-thaw cycles move masonry. A small crack found in fall is a cheap fix; the same crack in spring can mean water damage inside the wall.
What Can Safely Wait
Not every finding needs immediate work. Minor surface wear, a slightly worn cap gasket, or cosmetic crown crazing can go on a watch list. We tell you which is which, with photos, so you decide with real information.
Brands We Service
We work with Gelco liner and venting components and know where those systems tend to wear first, particularly at the joints and the top plate. Olympia Chimney products show up in a lot of Thornton homes, and we’re familiar with how their caps and liners age in this climate. When a component needs replacement, we match it to the system already in your flue.
Famco and Copperfield components come through our repair work regularly, and we know the failure points specific to each. We specify DuraFlex liners and HeatShield resurfacing for relining and flue repair, because those materials are built for the job. We service the equipment and know how it wears; we don’t claim to be a dealer for any of these brands. Whether you have Gelco, Olympia Chimney, Famco, Copperfield, or any other make, we can help.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Smoke rolling back into the room. A fireplace that won’t draft is usually telling you the flue is blocked or the pressure balance in the house has changed. Either way, it needs a look before the next fire.
- A strong, tar-like smell from the firebox. That’s glazed creosote, and it’s the kind that burns hottest. It doesn’t come off with a normal brush, so it needs a technician who can resurface or reline.
- Visible cracks in the firebox or flue tiles. Cracks let heat and gases reach framing that was never meant to see them. Get it inspected before you burn again.
- Flakes of creosote on the damper or smoke shelf. That means buildup has reached the point where it’s shedding. It’s a sign the flue is overdue and the next fire is riskier than the last.
- A dryer that takes two cycles to dry a load. That’s often a lint-clogged vent, which is a fire risk most homeowners never think to check. We clean those too.
Our Process, Step by Step
- 1
Book the visit. Call and tell us what you’ve noticed: smoke smell, weak draft, a gas appliance, or just an annual clean. We book a window and confirm what the visit will cover. You’ll know the scope before we arrive.
- 2
Protect the room. We lay drop cloths, seal the fireplace opening, and set up a HEPA vacuum before any brush goes in. Protecting your floors and furniture is part of the job, not an afterthought.
- 3
Clean the flue and firebox. We brush the full run from firebox to cap, clear the smoke shelf, and vacuum out everything that comes loose. For gas units, we clean the burners and check the pilot instead.
- 4
Run the camera inspection. A camera goes up the flue so we can see liner condition, joints, and any offset or damage a brush would miss. You see the footage and the photos with us.
- 5
Walk through findings and quote any repair. We show you what we found, tell you what can wait, and quote anything that can’t. If it’s a liner or resurfacing job, the written estimate spells out the material and the price.
How Much Does Chimney Sweep Cost in Thornton?
A typical chimney sweep in Thornton runs $150-$300 depending on flue length, access, and how much creosote has built up. A gas fireplace cleaning usually falls in the $120-$250 range. Fireplace cleaning as part of a full visit runs $100-$200. Repair work found during a sweep, like a liner section or a crown repair, typically runs $250-$1,200, and a full reline with DuraFlex or a HeatShield resurfacing job is quoted separately once we’ve seen the flue. All prices are estimates, and the written estimate sets the final price.
What affects the cost most is access (a steep roof or a tight chase takes longer), the condition of the flue, and whether the job is cleaning only or cleaning plus repair. One thing that pushes cost up unnecessarily is skipping years: heavy glazed creosote takes more time and sometimes resurfacing to fix.
The best way to avoid overpaying is to ask for the camera inspection and the photo report up front. A sweep without evidence is a guess. Every estimate from us is free, includes what we found and what it costs, and tells you plainly which items can safely wait. Call (866) 361-5660 for an exact quote.
Our Service Area Near Thornton
Chimney Sweep Thornton serves homeowners across the north metro area, including Northglenn, Federal Heights, Welby, Derby, Sherrelwood, Shaw Heights, and Broomfield. We also reach Dacono and Platteville, where a chimney sweep is a common fall booking before burning season. Typical response is same-day or next-day depending on the schedule. If you’re not sure whether you’re in range, call and we’ll tell you. For the surrounding areas, we also cover chimney sweep appointments.
Serving Thornton, CO – Our Local Coverage Area
We serve Thornton and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
Frequently Asked Questions About Chimney Sweep in Thornton
A chimney sweep is a trained technician who cleans soot and creosote out of the flue and firebox and inspects the whole system for damage. The sweep itself is mechanical: brushes and a vacuum, plus a camera to see what the brush can’t. It also includes a check of the cap, crown, damper, and flashing. Call (866) 361-5660 for an exact quote; estimates are free.
A standard sweep takes about 45 to 90 minutes, depending on flue length, access, and buildup. A gas fireplace cleaning is usually faster, around 30 to 60 minutes. If we find a repair during the visit, we’ll quote it and schedule it rather than stretching the appointment. Call (866) 361-5660 for an exact quote; estimates are free.
A chimney sweep in Thornton typically runs $150-$300, with gas fireplace cleaning around $120-$250 and fireplace cleaning as part of a visit at $100-$200. Repairs found during the sweep run $250-$1,200 depending on the material and extent. The written estimate sets the final price. Call (866) 361-5660 for an exact quote; estimates are free.
Yes. We work with Olympia Chimney, Gelco, Famco, and Copperfield components, and we know where each tends to wear in this climate. When something needs replacement, we match it to the system already in your flue. We’re not a dealer for any brand, but we service the equipment and know how it fails.
Same-day service is often available in Thornton when you call early in the day. We answer 24/7, and fast dispatch runs from 7am to 7pm, Sunday through Friday. We’re closed Saturday. A call outside dispatch hours is booked into the next opening.
We stand behind our work. Ask us about warranty coverage on your specific job when you book, and we’ll put the details in writing with your estimate. Material warranties from DuraFlex and HeatShield apply to the products themselves. You’ll know exactly what’s covered before we start.
Clear the hearth area and move anything breakable away from the fireplace, and don’t build a fire for at least 24 hours before the visit. Make sure we can get to the fireplace and the roof access point. If you have a gas appliance, leave the pilot as-is. That’s all you need to do.
Schedule Your Chimney Sweep Service in Thornton Today
Book your chimney sweep before burning season and get a camera inspection, a photo report, and a written estimate in one visit. If a repair turns up, we handle it under the same roof, from chimney repair work to liners and resurfacing, plus dryer vent cleaning as its own service. Start with the full scope at Chimney Sweep Thornton, or call (866) 361-5660 for a free estimate. We answer 24/7.
Written by the team at Chimney Sweep Thornton.