By James Rodriguez, Central Chimney Service.
Homeowners rarely question a sweep, but they almost always question a camera inspection. It sounds like an upsell, and it is the one part of the job that happens entirely out of sight. So here is what the camera is, what it finds, and when it is genuinely worth doing on a house in the southwest suburbs.
What the tool actually is
A chimney camera is a small, high-intensity light and lens on a flexible rod, lowered down the flue from the top or fed up from the firebox. It records video of every inch of the liner interior, which is the only part of a chimney system that carries the exhaust and the only part nobody can see from the ground.
The important detail is the lighting. A flashlight aimed up a flue from the hearth illuminates maybe the first six feet and shows you nothing about the joints above the smoke chamber. A camera lights the tile face directly and holds still long enough to distinguish a shadow from a crack.
Four things a camera finds that nothing else does
Cracked or shifted clay tiles come first. Clay expands and contracts every time you burn, and after enough seasons the mortar joints between tiles open up. A gap of a quarter inch is invisible from below and is a direct path for hot gas into the surrounding masonry.
Second, glazed creosote in the upper flue, where the flue gas cools fastest and tar condenses hardest. Third, gaps where the smoke chamber was parged badly or never parged at all. Fourth, offsets and blockages — a collapsed tile, a fallen brick, or nesting material lodged in a bend where a brush passes over it rather than through it.
What the camera does not do is diagnose on its own. Video shows a condition; deciding whether that condition matters takes someone who knows what the flue is venting, how the appliance is sized, and how the chimney was built. A hairline crack that is unremarkable on an open fireplace flue can be disqualifying on a flue serving a gas appliance, because acidic condensate finds every opening and works on the masonry behind it. That is why the footage should be reviewed with you in the room rather than emailed over as a file with a quote attached to it.
When it is worth it, and when it is not
A camera pass earns its keep in three situations: an older masonry chimney that has never been scoped, a chimney that has had a chimney fire or a suspected one, and any house you are about to buy or sell. It is also the right call whenever a sweep reports something ambiguous — a soft spot, an odd draft, a smell that does not match the soot load.
It is not necessary every single year on a well-documented, lightly used flue in good condition. Anyone who tells you otherwise is selling. Homes we service around Romeoville run heavily toward late-twentieth-century construction, and in our experience that is exactly the age band where clay liners start showing joint failure — so it comes up often here [Observed].
What happens after the footage
You should watch it. Not a summary, not a still photo — the actual video, with someone pointing at what they are concerned about and explaining why. A finding you cannot see for yourself is a finding you have no way to price-check.
From there the outcome is one of three things: nothing structural, a targeted repair, or a chimney relining. Those are very different jobs, and the camera is what separates them. Nobody should quote a reline without having looked, and we do not.
Booking an inspection in Romeoville
Central Chimney Service covers Romeoville and the surrounding towns seven days a week, 7 AM to 7 PM. We are insured and bonded, I have been doing this work in this area for 29 years, and you get the price up front before anything starts. See what a full chimney inspection includes, compare the rest of our chimney and duct services, or call (815) 305-5510.
Frequently asked questions about camera inspections
How long does a camera inspection add to the appointment?
Usually fifteen to twenty-five minutes on a standard single-flue chimney. The flue has to be swept first, because soot on the tile face hides exactly the cracks you are looking for, so it is done at the end of the visit rather than the start.
Can you scope a flue that has not been cleaned?
You can, but the results are close to useless. A layer of soot coats and softens every joint line, and glazed creosote can look like sound tile on video. Sweeping first is not padding the job; it is what makes the footage readable.
Does a camera inspection work on a metal chimney?
Yes, and it is often faster. Factory-built metal chimneys have smooth, uniform interiors, so damage stands out sharply: seam separation, rust perforation, warping from overheating, or crushed sections where a fastener was driven through.
Will I get a copy of the video?
You should ask for one, and any sweep should be willing. Footage matters most later, when you are comparing this year’s inspection against next year’s to see whether a crack is stable or growing.
Is a cracked tile always an emergency?
No. A single hairline crack in an otherwise sound flue is usually monitored rather than rebuilt. Multiple cracked tiles, displaced tiles, or open joints that expose the surrounding masonry are a different matter and mean the flue should not be used until it is addressed.
What is the difference between a Level 1 and Level 2 inspection?
A Level 1 is a visual check of readily accessible parts and is the annual standard for a system in known good condition. A Level 2 adds the camera scope of the flue interior plus accessible attic, crawlspace, and basement areas, and is what is called for after a property sale, a system change, or any suspected event.
Do gas fireplaces need a camera pass too?
Sometimes. Gas leaves no creosote, but its exhaust is acidic and slowly attacks mortar joints and liner walls. If a gas appliance has been venting into an old clay flue for a couple of decades, scoping it is reasonable.
Can a camera inspection tell me whether the chimney is leaking?
It tells you a great deal. Water entry shows up inside the flue as staining, efflorescence, rusted damper hardware, and softened mortar. What the camera cannot do is tell you where the water is entering from, which is why it gets paired with a look at the crown, cap, and flashing.
Published August 10, 2026 · Last updated August 9, 2026