Trace and Access is the section of your buildings insurance that pays for a specialist to locate a hidden water leak (the "trace") and physically reach it for repair (the "access") - including the cost of lifting floors, opening walls, and making everything good again afterwards. It does not cover repairing the pipe itself or the water damage caused - those fall under separate sections of the policy. Around 97% of UK buildings insurance policies include Trace and Access cover as standard with limits of £5,000-£10,000. The critical requirement is a professional written detection report: without one, insurers cannot establish where the leak is, what caused it, or what access is required - and the claim cannot proceed.
What Is Trace and Access Cover?
Trace and Access is a specific clause found within most UK buildings insurance policies. The name describes exactly what it does: it pays for the work of tracing - finding - a hidden leak, and then accessing - physically reaching - it so it can be repaired.
Hidden leaks present a unique problem. A burst pipe soaking a kitchen ceiling is obvious - the damage and the source are visible. But a pinhole leak in a pipe buried beneath a concrete floor, concealed inside a wall cavity, or embedded in a screed bed produces no visible surface moisture for weeks or months. By the time any sign of the problem appears at the surface, significant structural damage may already have accumulated invisibly beneath it.
This is precisely why Trace and Access cover exists. Locating a concealed leak requires specialist engineers using thermal imaging cameras, tracer gas, and acoustic listening equipment. Reaching it once found may require cutting into screed, lifting floorboards, opening wall panels, or removing tiling. Trace and Access cover pays for all of this - and for putting the disturbed surfaces back again afterwards.
What It Covers - Trace
The professional detection survey to locate the hidden leak - including thermal imaging, tracer gas, acoustic listening, pressure testing, and the specialist engineer's time. Also includes the written detection report provided to your insurer.
Covered under Trace and AccessWhat It Covers - Access and Make Good
The physical work of reaching the leak once located - lifting floorboards, cutting screed, opening walls, removing tiles. Also covers reinstating those disturbed surfaces afterwards - patching screed, replacing boards, retiling.
Covered under Trace and AccessWhat It Does NOT Cover
Repairing or replacing the leaking pipe or appliance itself - this is usually a maintenance cost not covered by insurance. Nor the structural water damage - that falls under the separate Escape of Water section of your policy.
Not covered - check other policy sectionsHow Trace and Access Works: The Full Process
Many homeowners encounter Trace and Access for the first time in a moment of crisis - a leak has been discovered and they need to act quickly. Understanding the correct sequence of steps ensures the claim proceeds smoothly and the insurer cannot find grounds to reduce or reject it.
Identify the Signs and Act Immediately
The process begins the moment signs of a hidden leak appear - a recurring pressure drop on the boiler or heating manifold, unexplained damp patches on floors or ceilings, warping or lifting floor coverings, a musty smell with no obvious source, or an unexplained spike in water bills. Do not wait for symptoms to worsen before acting. Limit further damage immediately: turn off the water supply at the stopcock if it is a mains leak, or isolate the heating system if the leak is from the central heating circuit. Move belongings away from affected areas. Photograph everything in its current damaged state before touching anything.
Contact Your Insurer the Same Day
Report the suspected leak to your insurer as soon as possible - the same day is the standard. Provide your policy number, a description of the signs you have observed, and confirm what steps you have taken to limit damage. Ask the insurer four specific questions: Do I have Trace and Access cover? What is the cover limit? Do I need to use an approved contractor, or can I appoint an independent specialist? What documentation do you need from the detection survey? Take the name of every person you speak to and note the time of every call. Request a claims reference number.
Commission the Specialist Detection Survey
A professional Trace and Access survey is carried out by specialist leak detection engineers equipped with thermal imaging cameras, tracer gas equipment, acoustic listening devices, endoscopic cameras, and moisture meters. The survey locates the precise fault point - not merely a suspected zone - using non-invasive methods before any physical access is made. This is the "trace" phase. On completion, the engineer produces a written report specifying the leak location, the detection method used, photographic evidence of the fault and associated moisture damage, and the access requirements. This report is the document your insurer needs - without it, the claim cannot proceed.
Submit the Detection Report to Your Insurer
Once the survey report is in hand, submit it to your insurer along with your photographic evidence, the claims reference number, and any additional documentation they requested. The insurer reviews the report to confirm coverage applies, establish the scope of access work required, and approve the work plan before any physical access is made. In most cases, this approval is given within a few days. Do not proceed with access work before approval is granted - work carried out without insurer sign-off may not be covered.
Access Work Is Carried Out
With insurer approval confirmed, the access work proceeds - this is the "access" phase. Engineers expose the fault point using the least destructive method possible: a targeted cut into the screed directly above the located fault, the removal of a specific section of floorboard, the opening of a wall panel at the confirmed leak position. The goal is a precise, minimal opening that exposes exactly what needs to be repaired - not a speculative excavation. Once the fault is exposed, a temporary repair may be made to stop ongoing water loss while the formal repair is arranged.
Permanent Repair and Drying
The permanent pipe repair is carried out by a qualified plumber. Following repair, the affected area must be thoroughly dried before any reinstatement work begins - saturated screed, timber, or plasterwork must return to acceptable moisture levels before new floor coverings or plaster can be applied. Professional drying equipment - dehumidifiers and air-movers - is used with moisture meter readings taken at intervals to confirm adequate drying. This can take several weeks for heavily saturated structures and cannot be rushed without risking the failure of subsequent reinstatement work.
Reinstatement and Claim Settlement
Once drying is confirmed, reinstatement work takes place - replacing the screed or floorboards opened for access, retiling, replastering, and redecorating. All costs are documented with invoices and submitted to the insurer for settlement. The insurer arranges payment either directly to the contractors or to you. Keep all receipts and completion photographs until the claim is formally closed in writing. A well-documented claim with a professional detection report, insurer-approved work plan, and complete invoicing closes cleanly - claims that lack documentation at any stage are more likely to face delays or partial payment.
Detection Methods Used in a Trace and Access Survey
The quality of the trace phase determines everything that follows. A precise fault location means minimal access damage, a clear insurance report, and a straightforward repair. A vague or uncertain location means speculative access work, complications with the insurer, and unnecessary disruption to your property. Professional Trace and Access engineers use several complementary methods.
Thermal Imaging
A thermal imaging camera detects infrared radiation - heat differences invisible to the human eye. When an active leak is present, escaping water creates temperature differentials in surrounding materials. The camera maps these variations across floors, walls, and ceilings, producing a heat signature image that reveals both the pipe route and the anomaly at the fault point. Thermal imaging is fast, entirely non-invasive, and works on all solid floor and wall types. It is less effective on heavily insulated surfaces or behind thick coverings that mask the thermal signature.
Non-invasive - maps heat across entire floor areaTracer Gas Detection
The most precise location method available. The system is drained of water and a harmless mixture of nitrogen and hydrogen is pumped into the pipe circuit under pressure. The gas percolates through the fault point and upward through the surrounding material. A sensitive gas detector is moved methodically across the floor or wall surface, identifying the precise point of highest gas concentration - the fault location - to within centimetres. Works effectively regardless of floor covering type or thickness, and does not require the system to be operational. The method of choice for screed-embedded systems where thermal imaging is inconclusive.
Most precise - locates leak to within centimetresAcoustic Listening Devices
Electronic ground microphones and listening probes amplify the sound of water escaping under pressure through a pipe wall - a distinct frequency signature distinguishable from normal flow noise. Engineers move the probe across the surface, noting signal strength, to pinpoint the leak position. Acoustic detection works on active systems with water pressure present, making it particularly effective for mains supply leaks and heating systems that cannot be drained. Often used alongside thermal imaging as a cross-reference and confirmation tool before any access cuts are made.
Effective on active systems - excellent confirmation toolEndoscopic Camera (Borescope)
A flexible camera on a probe, inserted through a small drilled access point, allows engineers to visually inspect concealed pipe runs, wall cavities, and void spaces. Particularly useful where a suspected leak area has been narrowed down but visual confirmation of the fault is required before committing to a larger access opening. Also invaluable for inspecting the condition of pipe joints and fittings in areas that cannot be accessed non-invasively. Provides photographic and video evidence of the fault in situ, which strengthens the insurer's detection report.
Visual confirmation in confined spacesMoisture Meters
Moisture meters measure the percentage of moisture content within building materials - screed, timber, plasterboard, brickwork. A grid of readings taken across the floor and surrounding walls maps the extent and pattern of moisture saturation, confirming that a water source is present and identifying the area of greatest concentration. Moisture meter data is a key component of the written report submitted to the insurer - it provides the objective evidence of water damage required for the claim to be accepted, particularly where the insurer requires proof of actual damage before Trace and Access cover is triggered.
Documents extent of damage for insurer evidenceHidden leak somewhere in your London property? WaterLeakFinder connects property owners with Trace and Access specialists who locate faults precisely and produce the written reports insurers require.
Request a SurveyThe Trace and Access Report: Why It Is Non-Negotiable
Every professional Trace and Access survey must conclude with a comprehensive written report. This document is not a courtesy - it is the evidence on which the entire insurance claim is built. Without it, the insurer has no independent basis on which to confirm the leak exists, establish its location, determine what access is required, or approve the work plan. Claims submitted without a professional report are rejected or placed on hold.
What a Professional Trace and Access Report Must Contain
- Leak location. The precise location of the fault point - floor, wall, or ceiling area - described clearly with reference to fixed structural features so the access contractor can find it without ambiguity.
- Detection methods used. A description of every method employed during the survey, with reasons for the chosen approach. This establishes the professional basis of the finding and confirms it was not guesswork.
- Photographic evidence. Thermal images, moisture meter reading maps, gas concentration readings, and any endoscopic images of the fault - all referenced to the report narrative. Photographs must be date-stamped.
- Moisture meter readings. Tabulated readings across the affected area, confirming the presence and extent of water damage in the surrounding materials. This provides the insurer with proof that actual damage has occurred.
- Access recommendations. A clear specification of what physical access work is required to reach the fault - the approximate floor area to be opened, the depth of the pipe, and any structural considerations.
- Engineer details and qualifications. The name, company, and relevant qualifications of the engineer conducting the survey. An anonymous report carries less weight with loss adjusters and insurers.
- Cost estimate for reinstatement. An indicative cost for making good the access - patching screed, replacing boards, retiling - gives the insurer the data needed to evaluate the claim against the cover limit.
What Trace and Access Cover Includes and Excludes
The distinction between what Trace and Access cover pays for and what it does not is misunderstood by the majority of claimants - and the misunderstanding costs money. The table below sets out the coverage position clearly.
| Item | Covered? | Notes |
|---|---|---|
| Professional detection survey and engineer time | Yes | The core purpose of Trace and Access cover. Survey costs are recoverable under this section. |
| Written detection report for the insurer | Yes | Report production is part of the survey service and covered under the same section. |
| Physical access - lifting floors, opening walls, cutting screed | Yes | Covered up to the policy limit. Speculative access without a detection report is not covered. |
| Making good - replacing boards, patching screed, retiling access point | Yes | Reinstatement of the access area to its pre-access condition is included. Full floor replacement is not. |
| Repairing or replacing the leaking pipe | No | The pipe repair itself is a maintenance cost. Check whether your home emergency add-on covers this. |
| Water damage to floors, ceilings, walls, structure | No | Covered under the separate Escape of Water section of your buildings policy - not Trace and Access. |
| Damage to belongings | No | Contents cover applies to damaged belongings - a separate policy section entirely. |
| Water ingress from outside - flooding, rainwater, groundwater | No | Trace and Access only applies to escape of water from internal systems. Ingress is a separate peril. |
| Gradual damage from a known, long-standing leak | At risk | Insurers may apply the gradual damage exclusion if the leak was known and not promptly reported. Act immediately. |
Why Trace and Access Claims Are Rejected
Trace and Access claims fail for a smaller number of reasons than general insurance claims - but those reasons are consistent and almost entirely avoidable. Understanding them is the most effective protection against a refused claim.
Delayed Reporting
The single most common ground for challenge or rejection. Insurers require policyholders to report leaks promptly - the standard expectation is the same day the problem is discovered. A delay of even a few days gives the insurer grounds to argue that the policyholder failed to take reasonable steps to limit damage, or that the damage worsened due to inaction. The practical consequence is a reduced settlement or outright rejection. Report first, document simultaneously, and book a survey immediately.
Speculative Access Without a Detection Report
Lifting floors or opening walls without a professional detection report in place first is the most expensive mistake homeowners make. Insurers will not pay for access work carried out speculatively - without a proven, documented reason for the specific opening. If a homeowner opens a floor looking for a leak and finds it, the access costs may not be covered because there was no professional report authorising that specific location before the work began. Always get the survey and report first.
Gradual Damage Exclusion
Most UK insurance policies exclude damage that developed gradually over time rather than arising from a sudden, accidental event. A homeowner who has been repeatedly topping up the boiler pressure for months without investigating the cause is vulnerable to this exclusion - the insurer can argue the damage was a known, progressive issue that reasonable maintenance would have prevented. The countermeasure is simple: commission a detection survey the moment recurring pressure loss or other symptoms are identified, and report to the insurer at that point. The survey report establishes when the leak was discovered and demonstrates prompt action.
Ingress Versus Escape of Water
Trace and Access cover applies only to water escaping from within the property's own plumbing, heating, or drainage systems. Water entering from outside - through a leaking roof, through the fabric of the building, from flooding - is not covered under this section. Attempting to claim Trace and Access costs for an ingress investigation will be declined. Check that the water source is genuinely internal before proceeding with a Trace and Access claim.
Trace and Access vs Home Emergency Cover: What Is the Difference?
These two types of cover are frequently confused, and the confusion can result in the wrong type of claim being made - leading to rejection and delay while the leak continues to cause damage.
| Feature | Trace and Access Cover | Home Emergency Cover |
|---|---|---|
| Purpose | Finding and reaching a hidden, concealed leak | Immediate temporary repair of an active emergency |
| What it pays for | Detection survey, access work, making good the access point | Emergency call-out, labour to temporarily stop ongoing damage |
| Does it find hidden leaks? | Yes - this is its core function | No - it addresses the immediate symptom only |
| Does it repair the pipe? | No - pipe repair is excluded | Sometimes - temporary repair only |
| Included as standard? | 97% of buildings policies include it | Usually an optional add-on - check your policy |
| When to use it | When the leak source is hidden and cannot be seen | When there is an active, visible emergency causing immediate damage |
In practice, both types of cover may be needed in the same incident: Home Emergency cover to stop an active burst pipe immediately, followed by Trace and Access cover to locate the source of a related hidden leak that is continuing to saturate the structure. They are complementary, not interchangeable.
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