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 Longmont Homeowners
A chimney that hasn’t been swept in a few seasons doesn’t announce itself. It just drafts a little worse, smells a little sharper in warm weather, and builds up creosote where nobody can see it. That’s the problem a professional Chimney Sweep Longmont visit solves: we open up the flue, camera the inside, and tell you the truth about what’s there. Our technicians have up to 9 years of experience, and they work with professional-grade materials – DuraFlex, HeatShield, Gelco, Olympia Chimney, Famco, and Copperfield – so you know exactly what’s going into your home. If you’ve just bought an older Longmont house or a home inspection flagged something, call (855) 360-7080. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday.
Chimney Sweep Services
Chimney Sweep Services cover the full flue from the firebox up through the cap, and most Longmont homes need them once a year if wood is burned regularly. When you book with Chimney Sweep Longmont, a technician sweeps the flue with rotary brushes sized to your liner, runs a camera to check for cracks and gaps, and hands you photos of what we found. If the sweep turns up a defect – a failing crown, a cracked flue tile, a rusted damper – we can often resolve it on the same visit rather than sending you off to schedule a second contractor. For a standard sweep, typical costs in the Longmont area run $180 to $340 depending on flue length, access, and how much buildup there is. We name the brands we install, so nothing about the job is a mystery.
Full-Flue Rotary Sweeping
Rotary brushes reach creosote that hand tools leave behind, especially the glazed stage that bonds hard to clay tile. Our technicians match the brush to the liner material so the tiles aren’t scored in the process. You get a clean flue and a straight answer on whether anything else needs attention.

Camera Inspection and Photo Report
Every sweep includes a camera pass down the flue, and you see the footage. That matters because creosote and cracked tile aren’t visible from the firebox, and a photo you can point to is worth far more than a verbal “you need work.” We tell you plainly when a repair can safely wait.

Styles & brands we work with
- Sweep & inspection
- Caps & crowns
- Flue relining
- Masonry repair
- Gas fireplace service
Chimney Cleaning
Chimney Cleaning goes a step further than a routine sweep when soot, ash, and debris have built up across seasons or after a long stretch without service. Homes in Longmont that burn ponderosa and other resinous softwoods tend to load up faster than folks expect, so cleaning on a schedule beats reacting to a smoky draft. Our technicians use drop cloths, a sealed vacuum, and containment to keep dust out of your living room – a proper clean doesn’t leave you wiping down furniture afterward. When cleaning reveals creosote at the glazed stage or a damaged lining, we can bring in HeatShield resurfacing to restore the flue rather than jumping straight to full replacement. Typical chimney cleaning in Longmont runs $180 to $340. If it’s been more than a couple of years, that’s reason enough to book a chimney sweep and find out what you’re working with.
Creosote Stages and Why They Matter
Creosote builds in three recognizable stages, from soft and flaky up to glazed and hard. The glazed stage is the one that burns hottest and is hardest to remove, and it’s the reason annual cleaning exists. If your flue has reached it, a brush alone may not be enough and resurfacing may be the smarter call.
Containment That Protects Your Home
We seal the firebox opening and run high-flow vacuums during the clean, so soot stays in the flue and out of your curtains. Floors and hearths get covered before any tool comes out. You shouldn’t have to clean up after a cleaning.
Fireplace Cleaning
Fireplace Cleaning handles the firebox itself – the brick, the grate, the baffles, the glass on a gas unit, and the smoke shelf above the damper where ash collects out of sight. It’s the part of the job most homeowners forget, but a firebox packed with old ash and soot can smell noticeably in summer and interferes with a clean draft come fall. Our Longmont technicians clean the firebox and damper assembly, check the refractory panels for cracks, and clear the smoke shelf so the fireplace actually draws the way it should. For wood-burning units we also look at the firebrick mortar joints, since a failing joint is a fire risk that’s easy to overlook. Fireplace cleaning typically runs $120 to $240 on top of a standard sweep, depending on the unit type and buildup. From the first sweep to a full liner repair, we handle the whole flue.
Wood-Burning Firebox Care
Brick and mortar take a beating from repeated heat cycles, and hairline cracks in the firebox are common in older Longmont homes. We clean the firebox, inspect the joints, and flag anything that needs repointing before you light another fire. Ash removal is part of the visit.
Glass, Logs, and Gas Firebox Interiors
Gas fireplaces still accumulate dust, soot, and pet hair across the burner and logs, which can throw off the flame pattern. We clean the glass, the logs, and the firebox interior as part of the visit. It keeps the unit running cleanly and makes the flame easy to read.
Chimney Services
Chimney Services covers everything a flue needs beyond routine cleaning: crowns that have cracked, flashing that has pulled loose, dampers that no longer seal, and caps that need replacing. Longmont’s cycle of hard freezes and rapid spring thaws works on masonry in a specific way – water gets into small cracks, freezes overnight, and widens them by morning, which is why so many chimneys here show spalling brick and crumbling crowns by the time a homeowner notices. We repair those defects in-house, and when a flue is too compromised to save with resurfacing, we install DuraFlex flexible liner systems – the industry standard for relining aged or damaged flues. Chimney repair estimates vary by job, but a crown repair typically runs $300 to $600, and a full reline runs $2,500 to $5,500 depending on flue size and length. Call for a free written estimate that sets the final price.
Crown, Flashing, and Cap Repairs
The crown and flashing are the chimney’s first line of defense against water, and both fail quietly. A cracked crown lets water into the masonry, and bad flashing lets it stain your ceiling. We repair both before the damage spreads.

Liner Resurfacing and Replacement
HeatShield resurfacing restores a liner from the inside without tearing out the old flue, which makes it less invasive and typically cheaper than a full reline. When the liner is too far gone, a DuraFlex flexible system takes its place. Either way, we explain both options before any work begins.
Chimney Sweep Certified
Chimney Sweep Certified means the technician doing the work follows recognized industry standards for inspection, sweeping, and documentation – not a certificate tacked on a wall but a way of working through the flue. It matters because a sweep is only as good as the person holding the brush, and a certified technician knows how to spot the difference between normal wear and a real defect. Our Longmont technicians have up to 9 years of experience and carry out every visit to those standards, documenting what they find with a camera and a photo report you keep. That record is useful when you sell, when an insurer asks, or when you want a baseline for next year’s comparison. Certification-standard inspections typically run $180 to $340 as part of a standard sweep. If you want the work done right the first time, book with us.
What Certification-Level Inspection Includes
A proper inspection covers the firebox, damper, smoke shelf, flue lining, crown, cap, and exterior masonry, with camera verification of the flue. Every finding is documented so you have a record. Nothing gets recommended without evidence you can see.
Documentation You Keep
You get photos of the flue and a written summary of what we found. That paperwork holds up when you sell the home or file an insurance claim. It also means next year’s technician has a baseline to compare against.
Gas Fireplace Cleaning
Gas Fireplace Cleaning covers the burner, logs, glass, and venting on a gas unit, which doesn’t produce creosote but still collects dust, soot, and debris that affect how it burns and how safely it vents. It’s also where carbon monoxide risk lives, so a gas fireplace is not a “set it and forget it” appliance. Our technicians clean the glass and logs, check the burner for clogs, verify the venting is clear, and test that the flame lights and burns the way it should. Longmont homes with sealed gas inserts need this checked periodically rather than left to run indefinitely. Gas fireplace cleaning typically runs $120 to $240 depending on unit type and buildup. If it’s been several seasons since anyone looked at yours, that’s a good reason to call.
Burner, Log, and Glass Cleaning
Dust and soot on the logs and burner throw off the flame pattern and can make a unit smell off. We clean the glass, logs, and firebox interior and reassemble carefully. The flame should read crisp and blue-based, not lazy and yellow.
Venting and Carbon Monoxide Checks
A gas fireplace venting into a blocked or damaged flue is a carbon monoxide hazard, and it’s not something to diagnose by smell. We check that the vent path is clear and that the flue is intact. If we find a problem, we tell you plainly and explain your options.
Chimney Maintenance
Chimney Maintenance is the yearly rhythm of keeping the whole system healthy rather than reacting after something breaks – sweep, inspect, repair small issues early, and document each visit. It’s the difference between a chimney that lasts decades and one that quietly degrades until a liner or crown replacement is the only path forward. In Longmont, where freeze-thaw cycles are hard on masonry and wood smoke builds creosote steadily, annual maintenance pays for itself. Our technicians handle the sweep, the camera inspection, and any minor repairs on the same visit, so there’s no need to coordinate a second contractor. Routine maintenance visits typically run $180 to $340, and catching a small crack early is almost always cheaper than the repair it becomes if ignored. The whole point is to avoid the expensive surprise.
Seasonal Timing and Burn Season
The right time to schedule maintenance is before burn season, when the flue is cool and the calendar isn’t packed. Getting ahead of it means a clean start to the year. If you’ve already been burning, there’s still time to book before the season ends.
Catching Small Repairs Early
A hairline crack in the crown or a loose flashing is cheap to fix and expensive to ignore. Maintenance visits are where those get caught, before water damage reaches your ceiling. We tell you plainly when a repair can wait and when it shouldn’t.
Brands We Service
We service DuraFlex flexible liner systems and know where they wear at the top plate and the appliance connector, which is often where a draft problem starts. We also work with HeatShield liner resurfacing, a targeted repair that can extend a chimney’s life without a full reliner replacement, and we’re set up to apply it correctly so it holds for the long haul. For dampers, caps, and hardware we work with Famco and Copperfield components, and our full roster runs to Olympia Chimney and Gelco as well. Every brand on that list is professional-tier, not a hardware-store substitute.
What this means for you is that a sweep or repair in Longmont comes with named, industry-recognized parts, and you’ll know exactly what’s going into your chimney before we start. If you’ve inherited an older system and aren’t sure what’s in the flue, we can identify it. Whether you have DuraFlex, HeatShield, Famco, or any other make, we can help.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Creosote buildup past a quarter inch: When creosote in the flue goes beyond a quarter inch, the risk of a chimney fire climbs sharply. A sweep clears it and tells you whether it’s at the glazed stage that needs more than brushing.
- A smoky draft or smoke rolling back into the room: A fireplace that won’t pull is a warning the flue is blocked or the damper isn’t sealing. It also means combustion gases have somewhere to go, and that somewhere shouldn’t be your living room. A camera inspection finds the cause.
- Sharp, tar-like smell in warm weather: That smell is creosote reacting to heat and humidity, and it’s a sign buildup has gone too long. It’s also often a health irritant. Getting it cleaned resolves the smell and the risk together.
- Cracked or crumbling masonry on the exterior: Loose brick, spalling faces, or a crumbling crown let water into the chimney, and water is the main cause of chimney failure. Longmont’s freeze-thaw cycle speeds this up. Repair early, not later.
- Rust or water stains around the firebox or ceiling: Rust on the damper or staining near the chimney means water is getting in past the flashing or crown. Left alone, it reaches the framing. Worth a look before the next hard freeze.
Our Process, Step by Step
- 1
Walk-through and a few questions. We start by asking about the fireplace, how often you burn, and anything you’ve noticed. We lay down drop cloths and set up containment before any tool comes out, so the work stays clean.
- 2
Sweep with matched brushes. Our technicians sweep the flue with rotary brushes sized to your liner material, removing soot and creosote from the firebox up through the cap. Ash gets removed and bagged, not left for you.
- 3
Camera inspection. A camera runs the full length of the flue so we can see cracks, gaps, and buildup you can’t reach. We record it and show you the footage.
- 4
Photo report and findings. We walk you through what the camera found, with photos you can see for yourself. If anything needs repair, we explain the options and tell you when something can safely wait.
- 5
Same-visit repair where possible. If a defect is identified during the sweep, we can often fix it on the same visit rather than sending you to a second contractor. When something needs a bigger repair, we schedule it with a written estimate.
How Much Does Chimney Sweep Cost in Longmont?
A typical chimney sweep in Longmont runs $180 to $340 depending on flue length, access, and how much creosote has built up. A fireplace cleaning runs $120 to $240 on top of that, and gas fireplace cleaning runs $120 to $240 as well. For larger repairs, a crown repair typically runs $300 to $600, and a full liner replacement runs $2,500 to $5,500 depending on flue size and length. HeatShield resurfacing often comes in lower than a full reline and is worth asking about if your liner is worn but not destroyed.
What affects the price most is access and condition: a flue you can reach easily costs less than one behind a tight roof line, and a chimney with glazed creosote or a cracked liner takes more time. How to avoid overpaying is to insist on a camera inspection you can see and a written estimate before any work begins. Nothing gets recommended without evidence, and we tell you plainly when a repair can safely wait.
A free estimate includes the walk-through, the sweep and inspection findings, the photo report, and a written price for any recommended repair. The written estimate sets the final price, so there are no surprises. Call (855) 360-7080 for an exact quote – estimates are free.
Our Service Area Near Longmont
We serve Longmont and the surrounding communities, including Boulder, Thornton, Westminster, Arvada, Greeley, Estes Park, Berkley, Commerce City, and Fairmount. Bookings near Longmont are typically scheduled quickly, and we dispatch Sunday through Friday, 7am to 7pm. If you’re in Boulder, our chimney sweep page covers the local details; for Thornton, our chimney sweep page has what you need.
Serving Longmont, CO – Our Local Coverage Area
We serve Longmont 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 Longmont
A chimney sweep is a professional cleaning of the flue to remove soot, ash, and creosote buildup. It also includes an inspection of the firebox, damper, flue lining, crown, and cap, with a camera check of the flue. The point is to clear the fire risk and catch small defects before they become expensive.
A standard sweep usually takes about an hour, and longer if repairs are done on the same visit or the chimney is heavily loaded. Gas fireplace cleaning and fireplace cleaning are quicker. We’ll give you a realistic time window when you book, so you can plan your day.
A typical sweep in Longmont runs $180 to $340, with fireplace and gas fireplace cleaning at $120 to $240 and major repairs higher. The written estimate sets the final price, and the estimate itself is free. Call (855) 360-7080 for an exact quote.
Yes. We install DuraFlex flexible liner systems and apply HeatShield liner resurfacing, and we work with Famco, Copperfield, Olympia Chimney, and Gelco components as well. These are professional-tier brands, and we name them because you deserve to know what’s going into your home. If your system uses something else, we can still help.
Same-day service is often available when you call early. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday, and we’re closed Saturday. A call outside dispatch hours is booked into the next opening. Call (855) 360-7080 to check availability.
Our work is backed by a satisfaction guarantee, and brand-specific materials like DuraFlex and HeatShield carry their own manufacturer warranties. We explain exactly what’s covered on your written estimate so there are no surprises. If something isn’t right after the job, we come back.
Clear the area around the fireplace so we can set up drop cloths and containment. Don’t light a fire the same day as your appointment, and give us a heads-up about pets, since the equipment can be noisy. Otherwise, there’s nothing complicated – we handle the rest.
Schedule Your Chimney Sweep Service in Longmont Today
If your fireplace hasn’t been looked at in a while, or a home inspection flagged something, book a sweep and find out where you stand. We’ll clean the flue, camera the lining, and show you photos before recommending anything – and tell you plainly when a repair can wait. Call (855) 360-7080. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. Estimates are free and there’s no obligation.
Written by the team at Chimney Sweep Longmont.