Chimney sweeping removes flammable creosote and soot from your flue so your fireplace vents safely and draws well. Wood-burning chimneys should typically be swept once a year; the right frequency depends on how much you burn and how fast buildup forms. Chimney Sweep Squad sweeps wood, gas, and pellet systems across McHenry, IL — insured, bonded, and working to NFPA 211. Call (815) 420-6665.
Why a clean chimney matters
Every wood fire leaves behind creosote — a sticky, tar-like residue that coats the inside of your flue. Once it builds into a thick glaze, it becomes the fuel for a chimney fire that can reach well over a thousand degrees and crack your flue liner. A sweep removes that fuel before it can ignite, and it clears the soot and debris that choke your draft and push smoke back into the room.
Signs you need a sweep
- A burnt or campfire smell from the fireplace, especially in humid weather
- Smoke spilling into the room instead of drawing up
- Black, flaky soot or glassy buildup visible in the firebox or on the damper
- Fires that are hard to start or burn weakly
- Falling debris, or signs of birds or animals
What happens during your visit
We protect your floors and furnishings, seal the opening, and use rods, brushes, and HEPA-rated vacuums to clear the flue top to bottom. We pair the sweep with a Level 1 inspection so we can see the flue, damper, and firebox clearly and tell you honestly whether anything needs attention. You get a straight answer, not a sales pitch.
What affects the cost
The main factors are your chimney’s height and access, how much creosote has accumulated, the number of flues, and whether the same visit includes any repairs. We price every job upfront after we understand your system — call for a quote.
Chimney fire risk
If you hear a loud roaring or cracking from the chimney, see dense smoke or sparks from the top, or smell an intense hot smell, treat it as a chimney fire: get everyone out and call 911. A heavy creosote layer is exactly what fuels this. See our chimney emergency guide.
Frequently asked questions
How often should a chimney be swept?
Most wood-burning chimneys should be swept once a year, and sooner if you burn often or notice odor, poor draft, or falling debris. The CSIA advises an annual inspection; your sweep schedule depends on how much creosote actually builds up in your flue.
What is creosote and why is it dangerous?
Creosote is the tar-like residue that wood smoke leaves on flue walls. It is highly flammable, and a thick layer is the leading fuel for a chimney fire. Regular sweeping removes it before it can ignite.
How long does a chimney sweep take?
A standard single-flue sweep and Level 1 inspection usually takes about 45 minutes to an hour. Heavy creosote, a very tall chimney, or hard-to-reach flues can add time. We work clean and protect your floors and furnishings.
Will sweeping my chimney make a mess in my house?
No. We seal the fireplace opening, use HEPA-rated vacuums and drop cloths, and work from the proper access points so soot stays contained. Most homeowners are surprised how little trace is left behind.
Can you sweep a gas fireplace chimney?
Yes. Gas fireplaces produce less soot but their flues still collect debris, bird nests, and corrosion, and they must vent freely. We inspect and clean gas venting to keep combustion byproducts moving safely outside.
How do I know if my chimney needs sweeping now?
Common signs are a campfire or burnt smell from the fireplace, smoke pushing into the room, black soot flakes in the firebox, a weak or sluggish fire, or buildup you can see on the damper. Any of these means call us.
Do you sweep the chimney from the roof or inside?
It depends on your chimney and the safest access. We often work from the firebox with rods and brushes to keep the job clean, and go to the roof when the cap, crown, or top of the flue needs attention.
What does a chimney sweep cost in McHenry?
Price depends on your chimney’s height, how much creosote has built up, and whether a single visit also covers repairs. Call (815) 420-6665 for honest, upfront pricing for your specific setup.
Book your chimney sweep
Clean flue, safer fires, better draft. We work clean and on your schedule, 7 days a week.
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Published November 10, 2026 · Reviewed by Joseph Ino, Founder & Master Chimney Technician, Chimney Sweep Squad