Yes, a CCTV chimney inspection can be well worth it when there is a specific reason to investigate the inside of your chimney.

A routine chimney sweep can remove soot, creosote and common debris, but much of the chimney remains hidden from view. If there is suspected liner damage, fallen masonry, an unexplained blockage, persistent smoke problems or a previous chimney fire, a specialist camera can provide a much clearer picture of what is happening inside the flue.

The National Association of Chimney Sweeps states that CCTV equipment can reveal issues including cracks in terracotta liners, missing bricks, damage to stainless steel liners and restricted flues containing creosote.

However, a CCTV survey is not necessary for every routine chimney sweep, and there is an important limitation to understand: a camera inspection alone does not prove that a chimney is safe or gas-tight. NACS advises that an appropriate smoke test is needed where flue integrity needs to be established.

So when is a CCTV chimney inspection worth paying for? This guide explains.

What Is a CCTV Chimney Inspection?

A CCTV chimney inspection uses a specialist camera system to examine areas inside the chimney or flue that cannot normally be seen from the fireplace.

The camera is passed through the chimney while the operator views the internal condition on a monitor.

Depending on the system, the inspection may allow the sweep or chimney specialist to examine:

• Internal brickwork
• Mortar joints
• Clay or terracotta liners
• Stainless steel flue liners
• Chimney bends and offsets
• Creosote deposits
• Fallen debris
• Blockages
• Connections between flue components

Some systems can also record photographs or video so that defects can be documented and reviewed.

NACS identifies CCTV cameras as professional equipment used by chimney sweeps for surveying chimneys and diagnosing faults in both new and existing flue installations.

Is a CCTV Chimney Inspection Worth It?

It depends on why the chimney is being inspected.

For a straightforward chimney that is regularly swept, performs normally and shows no signs of damage, a CCTV survey may not be necessary every time.

However, it becomes much more valuable when there is a problem that cannot be explained through ordinary sweeping or basic visual inspection.

A CCTV chimney inspection is particularly worth considering when:

• Smoke continues entering the room after sweeping
• A blockage cannot be identified
• Pieces of masonry fall into the fireplace
• A stainless steel liner may be damaged
• The chimney has experienced a fire
• Heavy tar or creosote is present
• The chimney has not been used for many years
• You do not know the chimney’s history
• You are preparing to install a log burner
• A previous installation appears questionable
• Sweeping rods encounter an unexpected obstruction

Midlands Sweeps also recommends CCTV inspection where ordinary sweeping cannot fully explain a blockage, smoke problem or suspected liner defect.

1. CCTV Can Identify Hidden Chimney Blockages

Some chimney blockages are easy to identify.

If twigs and nesting material fall into the fireplace, for example, a bird nest may be fairly obvious.

Other obstructions are more difficult to locate.

These can include:

• Fallen bricks
• Loose mortar
• Damaged liner sections
• Building debris
• Heavy creosote
• Partial bird nests
• Objects lodged in bends

A chimney brush may sometimes pass through part of an obstruction without revealing how serious it actually is.

NACS specifically notes that CCTV inspection can be valuable for restricted flues because a brush can sometimes pass through a partially obstructed chimney even though significant creosote remains.

The camera can help establish:

• Where the blockage is
• What appears to be causing it
• How severe it is
• Whether ordinary sweeping is likely to remove it
• Whether further specialist work is needed

2. CCTV Can Reveal a Damaged Flue Liner

Most of a chimney liner is hidden inside the chimney breast.

That makes it difficult to assess from the fireplace alone.

A CCTV survey may reveal:

• Splits
• Tears
• Corrosion
• Crushed sections
• Disconnected sections
• Poor connections
• Physical deterioration

NACS states that CCTV cameras can reveal splits and damage within stainless steel liners as well as faults in other types of flue liner.

This can be particularly useful if you are experiencing:

• Persistent smoke problems
• Poor chimney draught
• Unusual debris
• Suspected liner failure
• Problems after a previous stove installation

Finding the actual damage before recommending replacement can prevent unnecessary guesswork.

3. It Can Identify Cracked Clay or Terracotta Liners

Not every chimney uses a flexible stainless steel liner.

Older or purpose-built chimneys may contain clay or terracotta flue liners.

Over time, these can potentially develop:

• Cracks
• Broken sections
• Displacement
• Failed joints

These defects may not be visible from either end of the chimney.

A camera can provide a direct view of the liner’s internal surface.

NACS specifically identifies cracks in terracotta liners as one of the defects CCTV chimney equipment can reveal.

4. CCTV Can Show Missing or Damaged Brickwork

Older unlined chimneys rely heavily on their internal masonry.

Age, heat, water entry and previous chimney fires can contribute to deterioration.

A camera inspection may show:

• Missing bricks
• Deteriorated mortar joints
• Loose masonry
• Internal voids
• Fallen material
• Sections requiring further assessment

NACS notes that missing bricks are among the defects that chimney cameras can identify.

If pieces of mortar or brick repeatedly fall into your fireplace during sweeping, a camera survey may therefore be worthwhile.

5. It Can Help Investigate Persistent Smoke Problems

If your fireplace or log burner is smoking into the room, a chimney sweep is often an appropriate first step.

Common causes include:

• Soot buildup
• Bird nests
• Creosote
• Leaves
• Loose debris

But what happens when the chimney has been swept and the smoke problem continues?

At that point, further investigation may be needed.

Possible hidden causes include:

• Liner damage
• Internal obstruction
• Chimney deterioration
• Incorrect flue configuration
• Unexpected changes in diameter

Midlands Sweeps identifies persistent smoke following sweeping as one of the situations where a CCTV chimney inspection can provide useful additional information.

Remember that not every smoke problem originates inside the chimney. Poor ventilation, downdraught and fireplace design can also contribute.

6. CCTV Is Useful After a Chimney Fire

If your chimney has experienced a fire, you should not simply assume everything is fine because the fire has gone out.

Chimney fires can expose the flue to very high temperatures.

Potential damage can involve:

• Flue liners
• Masonry
• Internal joints
• Chimney connections

Some damage may be impossible to see from the fireplace.

A CCTV survey can help visually examine the internal chimney for obvious damage following the incident.

Midlands Sweeps includes a previous chimney fire among the reasons a more detailed internal inspection may be recommended.

Additional testing may still be necessary before the chimney is considered suitable for continued use.

7. CCTV Can Be Valuable Before Installing a Log Burner

A new log burner represents a significant investment.

Before connecting it to an existing chimney, it makes sense to understand the condition of the flue that will carry its combustion gases.

An inspection may identify:

• Internal deterioration
• Previous repairs
• Blockages
• Old liner problems
• Unexpected chimney dimensions
• Significant creosote deposits

A CCTV inspection can therefore be valuable where the chimney’s condition or history is uncertain before a new appliance is installed.

Midlands Sweeps specifically lists new stove or liner installation among situations where camera inspection may be useful.

8. CCTV Is Useful When You Buy an Older Property

Buying an older property with a fireplace can leave you with many unanswered questions.

You may not know:

• When the chimney was last used
• When it was last swept
• Whether it has ever had a chimney fire
• Whether a liner has been installed
• How old the liner is
• Whether previous modifications were carried out correctly

A normal visual inspection from the fireplace cannot reveal the whole chimney.

Where the condition genuinely matters — particularly if you plan to bring an old fireplace back into service — a sweep followed by appropriate inspection can provide much better information.

Midlands Sweeps advises further inspection where a chimney has an unknown history or has remained unused for many years.

9. CCTV Can Help With Heavy Creosote Problems

Creosote can appear as:

• Dry flakes
• Sticky deposits
• Thick tar
• Hard glazed coatings

Heavy accumulation can reduce the internal area of the flue and increase chimney-fire risk.

The problem is that a brush may sometimes pass through a restricted area without making the true amount of creosote obvious.

NACS describes CCTV as particularly useful when inspecting tarry chimneys and flues restricted by creosote deposits.

A camera can help establish how much material remains after cleaning and whether additional treatment is required.

10. CCTV Can Save Guesswork Before Chimney Repairs

One of the biggest advantages of a camera inspection is simple: you can diagnose before you repair.

Without internal inspection, someone may know that a chimney has a problem but not know exactly where it is.

A camera survey can help identify:

• Location of damage
• Extent of deterioration
• Type of obstruction
• Condition of a liner
• Areas requiring more investigation

This can make it easier to determine whether you actually need:

• More sweeping
• Bird nest removal
• Liner replacement
• Chimney repairs
• Additional testing

It does not guarantee that every problem will be visible, but it provides substantially more information than looking into the fireplace alone.

What Can a CCTV Chimney Camera Actually See?

Depending on visibility and the chimney system, a professional CCTV inspection may reveal:

Flue Liner Damage

Including splits, damaged sections and visible deterioration.

Clay Liner Cracks

Cracked or displaced terracotta sections may be clearly visible.

Missing Brickwork

Internal masonry defects can sometimes be identified.

Fallen Masonry

Pieces of brick or mortar lodged further down the flue may be located.

Bird Nest Material

The camera can help identify the location and extent of nesting material.

Creosote

Heavy tar and restricted internal surfaces can be recorded.

Unusual Obstructions

Objects or building debris can sometimes be located more accurately.

These capabilities align with NACS guidance on professional chimney CCTV equipment.

What Can’t a CCTV Chimney Inspection Tell You?

This is extremely important.

A CCTV camera cannot, by itself, prove that a chimney is completely safe or gas-tight.

The camera provides a visual inspection.

It may show cracks, splits and damage, but some leakage points may be too small or positioned in a way that cannot be reliably identified visually.

NACS states that although CCTV is extremely useful, it cannot determine by itself whether the chimney is fit for purpose and safe to use. Where flue integrity is being tested, an appropriate smoke test is required.

Think of the two procedures as answering different questions:

CCTV inspection:
“What can we see inside the chimney?”

Flue integrity or smoke testing:
“Are combustion gases escaping somewhere they should not?”

Depending on the circumstances, you may need one or both.

Is CCTV the Same as a Smoke Test?

No.

They are different diagnostic methods.

CCTV Chimney Inspection

A CCTV inspection visually examines the internal chimney.

It is particularly useful for identifying:

• Cracks
• Broken liners
• Missing bricks
• Obstructions
• Creosote
• Physical deterioration

Smoke Testing

A smoke test is designed to evaluate how smoke behaves within the chimney and, depending on the specific procedure, help detect leakage.

NACS emphasises that camera inspection should not be treated as a replacement for appropriate smoke testing where chimney integrity needs to be confirmed.

A professional should recommend the test appropriate for the problem rather than automatically treating every inspection method as interchangeable.

Is CCTV Inspection Included in a Normal Chimney Sweep?

Usually, not as a full survey.

A routine professional chimney sweep normally includes a basic inspection of accessible components.

Midlands Sweeps explains that a standard sweep may involve:

• Room protection
• Sweeping the flue
• Removal of soot
• Basic visual checks
• Appropriate draught or smoke checks
• Advice about visible concerns

A full CCTV chimney survey is a more detailed inspection and may be quoted as a separate service.

This makes sense because many perfectly normal chimneys do not require a full recorded camera survey every time they are swept.

Should the Chimney Be Swept Before CCTV Inspection?

Often, yes.

Soot and heavy deposits can obscure the surfaces that the camera needs to examine.

Sweeping first can provide:

• Better visibility
• A clearer view of liner surfaces
• Easier identification of cracks
• Better assessment of physical damage

However, there are situations where the sweep may want to inspect an obstruction before completely disturbing it.

The order of work should therefore be decided according to the reason for the inspection.

How Long Does a CCTV Chimney Inspection Take?

The duration varies depending on:

• Chimney height
• Number of flues
• Chimney condition
• Amount of debris
• Access
• Whether sweeping is included
• Whether a blockage is present
• Whether recording or reporting is required

A straightforward camera inspection will generally be quicker than a complex investigation involving multiple blockages or damaged flues.

When booking, ask whether the quoted service includes:

• Sweeping
• CCTV inspection
• Photographs or video
• Written findings
• Smoke testing
• Additional investigation

This makes comparisons between quotations much easier.

How Do I Know If I Need CCTV or Just a Chimney Sweep?

For many homeowners, a chimney sweep should be the first step.

A sweep may be enough when:

• The chimney simply needs routine maintenance
• It has been swept regularly
• There are no unusual symptoms
• The fireplace performs normally
• No suspicious debris is present

Consider CCTV when:

• A problem remains after sweeping
• The sweep finds something unusual
• The liner condition is uncertain
• Masonry is falling
• A blockage cannot be explained
• There has been a chimney fire
• You need more information before installation or repair

Midlands Sweeps makes the same distinction: a standard sweep includes basic accessible checks, while hidden defects may justify a CCTV survey or other testing.

What If the CCTV Inspection Finds Damage?

Finding damage does not automatically mean you need a completely new chimney.

The next step depends on what the camera shows.

Possible recommendations may include:

• Further sweeping
• Creosote treatment
• Bird nest removal
• Flue liner replacement
• Masonry repairs
• Smoke or integrity testing
• External chimney inspection
• Specialist assessment

The purpose of the camera is to give the professional better evidence before recommending what happens next.

CCTV Inspection vs Drone Chimney Inspection

These two services examine different areas.

CCTV Chimney Inspection

Best for examining the inside of the chimney or flue.

It can help investigate:

• Internal liners
• Cracks
• Blockages
• Internal masonry
• Creosote

Drone or Roof Inspection

Best for examining the outside of the chimney.

It may help identify:

• Chimney stack deterioration
• Damaged chimney pots
• Pointing problems
• External cracking
• Roof-level defects
• Cowl or terminal issues

Midlands Sweeps offers both internal CCTV and external drone/roof inspection services, allowing the inside and outside of a chimney system to be investigated where appropriate.

Is a CCTV Inspection Worth It Before Buying a House?

It can be, particularly when the fireplace or chimney is important to your purchase and there are unanswered questions about its condition.

You might consider it when:

• The property is old
• The chimney is visibly deteriorated
• A log burner has been retrofitted
• There is no installation paperwork
• You notice chimney-breast staining
• Debris is falling into the fireplace
• You plan to use a long-disused fireplace

However, remember that CCTV is only one part of chimney assessment.

If the aim is to confirm whether the chimney is suitable for use, further testing may also be appropriate.

Is It Worth Inspecting a Chimney Before Installing a New Flue Liner?

Potentially, yes.

Understanding the existing chimney route can help identify:

• Obstructions
• Internal narrowing
• Structural damage
• Difficult bends
• Old liner material

This information can be useful when planning a new installation.

If a professional can identify potential complications before installation begins, it may reduce surprises later.

Is a CCTV Chimney Inspection Worth It After Bird Nest Removal?

It can be useful where the nest was large or where there is uncertainty about whether the entire blockage has been cleared.

A camera can help check for:

• Remaining twigs
• Debris
• Additional obstructions
• Internal damage

Midlands Sweeps identifies bird nests as a common cause of complete or partial chimney blockage and offers both nest-removal and inspection services.

Frequently Asked Questions

What does a CCTV chimney inspection show?

It can visually reveal problems including cracked terracotta liners, missing brickwork, damaged stainless steel liners, creosote accumulation and certain chimney blockages.

Is CCTV chimney inspection necessary every year?

Usually not. Routine professional sweeping and inspection may be sufficient for a well-maintained chimney without unusual symptoms. CCTV is most valuable when there is a specific concern.

Can CCTV tell if my chimney is safe?

Not by itself. NACS states that CCTV cannot alone confirm that a flue is fit for purpose or gas-tight. Appropriate smoke or integrity testing may also be necessary.

Can CCTV find a damaged flue liner?

Yes. A chimney camera may reveal visible splits, deterioration and other physical damage in stainless steel or other liners.

Can CCTV find a bird nest?

It can help locate and assess nesting material or remaining blockages inside the chimney.

Do I need CCTV if my chimney has already been swept?

Not necessarily. But if smoke, poor draught or another problem continues after sweeping, a camera inspection may help identify a hidden cause.

Should I have CCTV after a chimney fire?

A detailed inspection is sensible before returning the chimney to normal use. CCTV can help identify visible internal damage, although further testing may also be required.

Is CCTV useful before installing a log burner?

Yes, particularly when the condition or history of the existing chimney is uncertain.

Is CCTV inspection better than a smoke test?

Neither is universally “better.” They answer different questions. CCTV visually examines the chimney, while appropriate smoke testing can help investigate leakage and integrity.

Can CCTV show creosote buildup?

Yes. NACS specifically identifies chimney cameras as useful for inspecting tarry and creosote-restricted chimneys.

So, Is a CCTV Chimney Inspection Worth It?

For routine chimney maintenance, you may not need a complete CCTV survey every time your chimney is swept.

But when there is an unexplained problem, a CCTV chimney inspection can be extremely valuable.

It provides a view into parts of the chimney that would otherwise remain hidden and can help identify:

• Blockages
• Cracked liners
• Damaged stainless steel flues
• Missing masonry
• Heavy creosote
• Internal deterioration

Professional chimney sweeps increasingly use CCTV equipment for exactly this type of fault diagnosis, and NACS includes chimney cameras among the specialist equipment used by its members.

The important point is to understand its limitations: a camera survey is a visual inspection, not proof that the chimney is completely safe or gas-tight. Where chimney integrity is in question, appropriate additional testing should be carried out.

Midlands Sweeps provides CCTV and drone chimney inspections alongside professional chimney sweeping, flue liner installation, bird nest removal and log burner services from its base in Swadlincote and surrounding Midlands areas.

If your chimney continues to smoke after sweeping, contains unexplained debris, has suffered a chimney fire or may have a damaged liner, a CCTV inspection can help identify what is actually happening before you spend money on unnecessary repairs.