You have found the house. The survey is back. There are a few minor items flagged, the usual things, and you are not particularly worried. The chimney gets a brief mention, probably something like “chimney appeared sound at time of inspection” or “recommend further investigation by specialist.” Your solicitor moves things along. Contracts are close. And then, about six months after you move in, you light your first fire and notice smoke backing into the room. Or worse, you have a chimney sweep in for a routine clean and they find something that stops them cold. This is a scenario The Soot Doctor sees regularly, and it is almost always preventable. A pre-purchase chimney survey, a proper one, carried out by a specialist before you sign, is one of the most cost-effective pieces of due diligence available to any buyer, and it is also one of the most powerful negotiating tools you may never have heard of.
The structural survey that accompanies most property purchases in Ireland is a broad assessment. A qualified surveyor walks the property, identifies visible defects and areas of concern, and produces a report that covers the building in general terms. It is invaluable, but it has clear limitations when it comes to chimneys and flue systems.
A standard surveyor will typically note the visible condition of the chimney stack at roof level, the presence or absence of a chimney pot, any obvious signs of pointing failure or structural movement, and the general condition of the fireplace opening itself. What they cannot tell you because they do not have the specialist equipment to do so, is the internal condition of the flue liner, the presence of blockages, the degree of creosote or soot build-up within the flue, whether previous repairs have been carried out correctly, or whether the flue is structurally sound, correctly sized for its intended appliance and safe to use.
That gap between what a standard survey covers and what you actually need to know about a chimney and flue system is precisely where a specialist chimney survey sits. And it is a significant gap. Some of the most expensive chimney repairs The Soot Doctor is called to assess were in properties where the buyer assumed the standard survey had covered the chimneys adequately. It had not, through no fault of the surveyor, it is simply not what a general structural survey is designed to do.
The definitive tool in chimney inspection is the CCTV camera survey, a high-resolution camera lowered through the entire length of the flue, capturing detailed footage of the liner’s internal condition from the firebox opening to the chimney pot.
What this reveals can range from entirely reassuring to genuinely alarming. At the reassuring end: a sound, intact liner in good condition, clean of significant build-up, with no evidence of previous fire damage or structural defect. This is a result that confirms the chimney is ready to use and requires no remedial work, valuable information in itself for a buyer.
At the more serious end of the scale, a camera survey can reveal cracked or collapsed liner sections, which allow combustion gases, including carbon monoxide, to escape into the fabric of the building rather than being safely conducted to the outside. It can show evidence of significant creosote accumulation, which is both a fire risk and an indicator that the appliance has historically been used incorrectly. It can identify voids or gaps in the flue structure where mortar has failed and cold bridging or moisture ingress is occurring. It can reveal previous internal repair attempts, cement packing, metal patches, that indicate the chimney has had historic issues the vendor may or may not be aware of. And it can show whether the flue dimensions are actually appropriate for the size and type of appliance installed, which is a more common mismatch than buyers realise.
In properties that have had a solid fuel or wood-burning stove installed, the camera survey also establishes whether the stove is connected to a properly lined and correctly sized flue. Retrospective stove installations are common in older Irish properties, and they vary dramatically in quality. Some are done impeccably; others were carried out without relining the existing flue and without any inspection of the chimney’s condition at the time of installation. The difference between those two scenarios has major implications for both safety and the cost of bringing the system up to standard.
Here is where the pre-purchase chimney survey becomes genuinely valuable as a tactical tool, not just a safety measure.
When you commission a specialist camera inspection before signing contracts, you receive a written report with photographic and video evidence of the flue’s internal condition. If that report identifies defects and on properties with older chimneys, it frequently does, you have documented, professional evidence of a specific defect that you can bring directly into price negotiations.
Chimney relining, which is often the recommended remedial action when a flue liner is cracked, deteriorated or inadequate for the installed appliance, is not a small-ticket item. A full twin-wall flexible liner installation in a typical Irish property costs several thousand euro, depending on flue length, access and the complexity of the system. A chimney repair and repoint at stack level, or significant restoration work to the internal fabric of the chimney breast, adds further. These are costs that a buyer who discovers them after exchange has no leverage over. They simply become your problem.
A buyer who arrives at the negotiating table with a specialist chimney survey report showing a cracked liner and a required relining works estimate has a concrete, documented basis for requesting a price reduction. The seller can accept the reduction, agree to have the works carried out prior to completion, or decline, but the buyer now has real, specific information rather than a vague sense that something might be wrong. That specificity is power.
In practice, The Soot Doctor regularly produces pre-purchase inspection reports for buyers in Dublin, Wicklow and the surrounding counties, and it is not uncommon for the findings to support price reductions that significantly exceed the cost of the survey itself. A survey that costs a few hundred euro and identifies a €4,000 relining requirement has already delivered a clear return on investment, regardless of how the negotiation resolves.
A chimney survey is worth commissioning on virtually any property with a working fireplace or stove, but there are specific scenarios where the case for it becomes particularly strong.
Older properties, broadly, anything built before the mid-1980s, are likely to have original unlined flues. Prior to the widespread adoption of flexible liner systems, chimneys in Irish residential construction were simply brick-built flue passages, often without any internal liner at all. These can be in excellent condition, particularly in properties that have been well-maintained and whose fireplaces have not been heavily used. But they can also be deteriorated in ways that are not visible from the hearth opening and that a standard survey will not detect.
Properties with stoves installed. Any property where a solid fuel or wood-burning stove has been installed is worth inspecting carefully. Stoves concentrate higher levels of heat into the flue than an open fire, and they require a correctly sized, properly lined flue to operate safely. A stove connected to an unlined or incorrectly sized flue is a safety hazard. Before you commit to buying a property on the basis that it has a lovely stove you are looking forward to using, it is worth confirming that the stove is actually safe to light.
Properties that have been let or used as short-term rentals. Chimneys in rental properties are not always maintained to the standard that owner-occupied homes tend to achieve. High creosote build-up is common in rental flues where the chimney has not been swept regularly. Camera surveys in these properties sometimes reveal significant accumulation or damage from chimney fires that occurred and resolved themselves, without anyone ever knowing.
Properties where the vendor is uncertain about the chimney’s history. If a vendor cannot tell you when the chimney was last swept, whether the stove installation was professionally carried out or whether there have been any previous chimney repairs, that uncertainty is itself a reason to get a specialist in before you commit.
Read More: The Danger of Carbon Monoxide: Prevention Through Proper Chimney Maintenance
For properties with oil-fired boilers or range cookers, there is a parallel specialist inspection worth knowing about: the OFTEC CD81 inspection, which The Soot Doctor is certified to carry out. This is a formal assessment of the oil-fired appliance, its flue and associated components, and it produces a written certificate that confirms the installation is compliant and safe.
In the context of a property purchase, an OFTEC CD81 inspection provides the same kind of documented certainty for an oil system that a chimney camera survey provides for a solid fuel or gas flue. If the property you are buying has an oil-fired appliance and you do not have an up-to-date CD81 certificate, commissioning one before completion is straightforward and gives you a clear picture of the system’s condition and any required remedial works.
The process is straightforward. Contact The Soot Doctor, provide the property address and the type of heating appliance in question, and we will arrange a time to carry out the camera inspection. We work across Dublin, Wicklow and the wider region, and we produce a written report with photographic evidence that you can share with your solicitor, estate agent or the vendor directly.
The survey is carried out by experienced specialists with over 20 years in the chimney and flue trade, not a generalist assessor, but people who understand exactly what they are looking at and what the findings mean in practical terms. Our reports are clear, specific and actionable, and they give you everything you need to make an informed decision about a purchase and, where defects are found, to negotiate from a position of knowledge.
If you are sale agreed and moving toward exchange, do not wait until after the keys are in your hand to find out what is going on inside the flue. Call us on 01 902 0758 or get in touch through sootdoctor.ie.
Read More: Chimney Inspection & Cleaning in Ireland: How Often You Should Sweep & Survey Your Chimney
A specialist chimney camera inspection involves lowering a high-resolution CCTV camera through the full length of the flue to capture detailed footage of the internal condition of the liner and flue structure. The inspection is followed by a written report with photographic evidence, covering the condition of the liner, any defects identified, evidence of previous repairs or damage, and recommended remedial works where required.
Survey costs vary depending on the property, the number of flues being inspected and the complexity of access. Contact The Soot Doctor directly for a specific quote for your property. As a general principle, the cost of a survey is almost always a small fraction of the potential remedial costs that go undetected without one.
A single flue inspection typically takes around 45 minutes to an hour, depending on flue length and access. Multiple flues on the same property can be inspected in a single visit. The written report is provided following the inspection.
Yes. The inspection can be carried out at any stage of the purchase process, provided access to the property can be arranged with the vendor or their agent. Many buyers commission the survey at the same time as their general structural survey to consolidate access and information-gathering in a single visit period.
The survey itself does not affect a mortgage application, but the findings, if they reveal a significant defect, may be relevant to your lender if they affect the property’s value or require disclosure as a material matter. Your solicitor is the best person to advise on how any findings should be managed in the context of your purchase.
Yes. The Soot Doctor offers a full range of chimney services including flexible liner installation, chimney repair and restoration, chimney sweeping and stove servicing. If a pre-purchase survey identifies works required, we can provide a detailed quotation that you can use in negotiations and carry out the works once the purchase is complete.
Buying a house is the biggest financial commitment most people make. The chimney, which can cost several thousand euro to reline or repair when it is found to be defective, is one of the elements that a standard survey routinely underassesses. A specialist camera inspection before you sign is a few hundred euro that could save you a multiple of that in unexpected remediation costs, and it gives you the factual foundation to negotiate with confidence rather than guess.
The Soot Doctor has been working with buyers, homeowners and investors across Dublin and Wicklow for over 20 years. Our pre-purchase chimney surveys produce clear, photographic reports that your solicitor and estate agent can use directly. If you are sale agreed and moving toward completion, book your chimney inspection before contracts are signed. Call us on 01 902 0758 or visit sootdoctor.ie to arrange yours.
