In Longmont, a chimney is heating equipment, not decoration: creosote builds fast under heavy use, ice works every crack wider, and a cold flue fights every startup. We diagnose on camera and fix the real cause - same-day service, licensed and insured, with free estimates today.
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The six services Longmont homeowners call us for most - from a wood stove flue loaded with creosote after a hard winter, to a crown split by freeze-thaw before the snow returns. Everything on this page is chimney in Longmont, CO — the work, the local conditions and the coverage.
Sweep & Cleaning
Chimney Sweep
The full professional sweep: rotary brushes scrub the flue from top to bottom while a HEPA vacuum keeps every speck of soot sealed in — the visit that keeps a chimney safe to burn in. In Boulder County, a cap and ice-damage check is part of the visit after a hard winter. Chimney Sweep in Longmont, CO starts with a real look at the problem — never a guess over the phone.
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Sweep & Cleaning
Chimney Cleaning
A cabin flue near Longmont idle all summer still collects dust, moisture and nesting. Creosote, soot and ash removed from the flue, smoke shelf and firebox — the deep clean that kills the campfire smell and the fire risk with it. The crews behind chimney cleaning in Longmont, CO are the same ones who cover the ZIP codes listed below.
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Repair
Chimney Repair
Any chimney, any problem — leaks, cracks, crumbling brick, bad draw. Diagnosed on camera first, then repaired properly with the right materials. That local standard is what chimney repair in Longmont, CO means with Chimney Service Co.
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Inspection & Care
Chimney Inspection
A full inspection of flue, liner, cap, crown, flashing and firebox — camera inside the flue, with a plain-language report of what is safe, what is not, and what can wait. The crews behind chimney inspection in Longmont, CO are the same ones who cover the ZIP codes listed below.
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Install & Replace
Chimney Cap Installation
A quality stainless cap keeps rain, birds and sparks where they belong. Fitted to your flue, secured properly, and screened against animals. Around Longmont, the fastening is built for exposure - high wind, ice forming at the top, and snow pressing down for weeks at a time. Chimney Cap Installation in Longmont, CO is one call away, every day of the week.
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Repair
Chimney Liner Repair
Cracked tiles, gaps at the joints, a liner that is shifting — liner faults found on camera and repaired so hot gases stay inside the Longmont flue where they belong. Months of daily heat cycles crack older liner tiles at the joints up here. For chimney liner repair in Longmont, CO, one call books the visit and a local tech takes it from there.
Get a free estimateNeed something else — a damper, a blower, a smoke problem, a bird in the flue? We cover all 27 fireplace specialties. Call (888) 258-0797 and describe it.
A chimney in Longmont does real heating work at altitude - long burn seasons, heavy snow, and freeze-thaw cycles that never let the masonry rest. This is what we actually find here, and what we check on every visit.
Mountain masonry freezes and thaws over and over all winter. Water trapped in mortar, brick and crown expands as it freezes, cracking joints and splitting faces a little wider each cycle. By spring, a Boulder County chimney can carry a season of small cracks that all leak at once in the thaw.
Thin air at altitude changes how a flue draws, and a tall mountain chimney behaves differently from the same chimney at sea level. Marginal draft problems that would pass elsewhere smoke here, especially in tight, well-sealed mountain homes. We diagnose draft as an altitude problem, not just a blockage hunt.
In Longmont, wood stoves and fireplaces often carry a real share of the heating load for months. Heavy use means heavy creosote, and stoves burned low overnight lay down glazed buildup fast. These flues need sweeping on a use schedule, not a calendar guess - by cords burned, not by the year.
Plenty of Longmont buyers inherit a mountain chimney with a hard, undocumented history - seasons of heavy burning, freeze damage nobody tracked, a liner of unknown age. One camera inspection before the first winter tells you what you have, what is safe to burn, and what to repair while the weather still allows it.
Longmont sits in Boulder County, and the ZIP list at the bottom of this page covers 3 serviceable ZIP codes — 80501 through 80504. The closest served neighbors are Mead, Frederick, Firestone, and every one of them is covered by the same crews, the same day, under the same number: (888) 258-0797.
Same-day service, free estimates, licensed & insured — and a flue you can see on camera, clean from top to bottom.
Water soaks into mortar, brick and the crown, then expands as it freezes, cracking joints and splitting surfaces a little wider each cycle. Over a mountain winter those small cracks become leaks, loose brick and liner damage. Spring is the honest time to assess it: we check the masonry and flue on camera and tell you what winter actually did.
A flue full of deep-winter cold air resists the first fire until it warms, and smoke spills while it does. Ice at the cap, partial creosote blockage or a liner problem make it worse and slower to clear. If smoking lasts beyond the first minutes, it is a diagnosis, not a quirk - we check flue, cap and liner to find it.
Yes. Thinner air and the height and exposure of a mountain chimney change its draft, and a system with marginal draw will smoke here when it might pass at lower elevation. Tight, well-insulated mountain homes add negative pressure to the problem. We diagnose draft with altitude and the house itself in mind, not just the flue alone.
Check the chimney before the first fire of every stay that follows a long idle stretch, and book a full inspection each season. Idle mountain flues collect moisture, ice damage and nesting, and the first hard burn tests all of it at once. A swept, inspected flue is what makes a cold cabin safe to heat on arrival night.
It should not. The liner keeps heat and exhaust inside the flue and away from framing, and a cracked liner under heavy mountain use works against you every single fire. Freeze-thaw also widens liner cracks from outside while you wait. If a camera inspection finds failed sections, repairing them before the burn season is the safe order of work.
No — and be wary of anyone who does. Every chimney fails differently, so a phone price is a guess that changes at your door. Our estimates are free: a tech looks at the actual problem, then gives you one clear price before any work starts.
Chimney Service Co is a national company with local technicians serving Longmont street addresses across the ZIP codes below — same-day service and free estimates, every day 8 AM – 8 PM. More of Colorado is covered from our Colorado page. The Longmont list below covers 3 ZIP codes, 80501 through 80504.
Don't see your ZIP? Longmont also uses P.O. Box and single-organization ZIP codes that have no street addresses — call (888) 258-0797 and we will confirm coverage for your street address on the call.
Also serving nearby: Mead, CO · Frederick, CO · Firestone, CO · Erie, CO · Dacono, CO · Berthoud, CO.
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