LEAKS

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Leaks are expensive and damaging; boiler leaks could leave you without heat or hot water. A boiler losing pressure, burst pipe or high water bill must be resolved quickly to prevent further damage.

London Damp Specialist is here to help you with your leaky home problems. We’re experienced professionals who know how to survey your home and help you get repairs covered quickly. Most leaks can be dealt with easily, so don’t struggle on your own. Let us help you get your home back in order – book your survey today!

water leak through the heating radiator tube

How can you find a water leak?

There are many ways to find water leaks, both big and small. Depending on the size of your home or business, and the location of the potential leak, there are different methods you can use to track it down.

Here are some tips:

  • NCheck all exposed pipes for moisture or wet spots; this is often a telltale sign that there is a slow drip somewhere along the line.
  • NAnother way to find tiny leaks (or those hidden behind walls) is by scanning your property with a thermal imaging camera—this will show any temperature differences caused by water seeping through cracks or holes.

If you have access to your home’s main water shut-off valve, another method is shutting off all appliances and fixtures that use water in your home, then checking your meter reading after two hours has passed; if the dial continues moving even when nothing should be running, chances are good you’ve got a leak somewhere.

What to do if you have a water leak?

Do not ignore a water leak! It is dangerous and can cause secondary damage, such as mould. Get professional help to fix the problem – start by booking a leak detection survey today to identify the problem.

Do leaks always get worse if left?

If you experience a water leak, fix it as soon as possible. The longer you wait, the more damage your property will suffer – and this often comes with an increased financial cost.

I am buying a property, can it be checked for leaks?

If we are able to access the property (with your help), carrying out a leak detection survey is something we can do. To look for signs of a leak, we will use a number of techniques.

Waterdrop splashes in motion

Qualification list

PCA-Certificated Surveying

 

  • CSDB (Certificated Surveyor of Dampness in Buildings): This certification ensures your damp diagnosis is carried out to a recognised industry standard. 
  • CSTDB (Certificated Surveyor of Timber and Dampness in Buildings): This means we can assess timber decay, wet rot, dry rot and wood-boring insect activity in the same visit, giving you a complete picture of your property’s condition. 
  • CSSW (Certificated Surveyor in Structural Waterproofing): Where basement or below-ground waterproofing is involved, this certification ensures that any tanking or structural waterproofing solution we recommend is specified the first time correctly.

CSCS

 

  • CSCS (Construction Skills Certification Scheme): Our experts carry a CSCS card, which confirms they’re authorised and trained to work safely on-site, giving you confidence that the team in your home meets recognised industry safety standards.

Asbestos awareness

 

  • Asbestos awareness: Older properties may contain asbestos, particularly in areas where damp and timber work are common. Our team holds UKATA-accredited Asbestos Awareness training as standard and where a job risks disturbing such materials, our experts are more than qualified to manage the work safely and in full compliance with UK regulations.

30-Year Warranty + 10-Year Insurance-Backed Guarantee

 

Your damp repair is protected for decades. 

  • 30-Year Warranty: All remediation work is covered by a 30-year workmanship warranty, protecting your property against recurrence of the treated issue.

  • 10-Year Insurance-Backed Guarantee (IBG): Your guarantee is insurance-backed for 10 years through Quality Assured National Warranties (QANW), so your cover remains valid even if we’re unable to fulfil it ourselves.

  • 24-Hour Report Delivery: Comprehensive digital survey reports are typically issued within 24 hours of the inspection’s completion.

What are the signs to look out for?

Water leaks can have many different signs, some more clear than others. However, these may be included – rapidly using up water, seeing damp patches on walls or ceilings, navigating through higher humidity/moisture or condensation levels inside a property or encountering strong smells. Other signs to look out for include hearing the sound of running water when none should be present, issues with your boiler losing pressure suddenly as well as structural problems – spongy flooring and cracking/visible water stains/damp. Don’t wait, book a leak detection survey today!

Who is responsible for fixing water leaks at a property?

According to most laws, if the sewage or water is on your land, then it becomes your responsibility. However, if the pipes are located elsewhere, such as pavements or roads (external to your property), then it typically falls under the local water company’s duty. It’s important to remember that you might be able to use ‘trace and access’ cover on your insurance policy for water leakages.

Will my property get damaged when carrying out leak detection work?

To avoid damaging your property, we recommend always using non-invasive leak detection methods. In some cases, however, we may need to make tiny holes – for example, to allow a borescope camera inside a wall or area under the floorboards so that we can see and identify the water leak.

Do you have to turn off the water to find the leak?

Depending on the location of the water leak, we may need to turn your water off for a short period of time. However, we will always consult with you before doing so and only keep the water off for as long as necessary. In some cases, we won’t need to turn your water off at all.

How long will it take you to find the leak?

This is not a straightforward question to answer, as it will depend on the individual case. However, we can say that in most cases, this will be done within a day. It usually only takes a few hours, but it depends on how hidden the leak is and its size of it. The layout of your property can also play into how long fixing the issue will take. We would be happy to discuss this with you further when we come to do your leak detection survey.

Water damage in basement

Where do Water Leaks most occur?

Water leaks can occur for a variety of reasons and often in places you wouldn’t expect. Here are some more common locations: central heating pipes, in hot and cold water feeds around your property, supply pipes to properties, from radiators, plumbing connections to sinks/baths/showers/toilets, seals around baths and showers failing, waste/sewerage pipes in properties.

What makes a water leak detectable?

Our leak detection team is specifically trained to notice clues that allude to water leaks, investigate them using high-tech equipment, locate the source of the leak, and identify its root cause. These telltale signs can be anything from moisture levels (detected with a moisture meter) and acoustic or thermal readings (picked up by acoustic or thermal imaging leak detection) to more pungent odours or visible indications of a problem.

 

How can a property be dried after a water leak?

Depending on the part of your house affected by the water leak and what materials are involved, we will use dehumidifiers, air movers/fans, and sometimes heaters to dry out your home. Sometimes, we need to use water pumps (for example, in flooded basements).

Will you provide a water leak detection report?

Yes, we can give you records of the investigations and work we have done – this comprises proof we have gathered during. This could be handy to provide your insurance company with several motives, not limited to the fact that they may pay for it!

How do you detect water pipes in a property?

There are many methods we use to detect water pipes, even in hidden places. Our leak detection specialists have various methods to find water pipes, and many of them complement each other.

construction worker points to the place
Water Is Leaking From The Pipe

frequently asked questions

Can leaks cause mould growth or other health hazards?

Yes, leaks can create damp conditions that are ideal for mould growth, which can lead to health hazards like respiratory problems, allergies, and asthma.

Can plumbing issues, such as burst pipes or faulty fixtures, cause leaks?

Absolutely, plumbing issues including burst pipes, faulty fixtures, or corroded pipework can all lead to leaks.

Can roof leaks be a common problem in buildings?

Yes, roof leaks can be a common issue in buildings, especially in those with older roofing systems or those exposed to harsh weather conditions.

Can leaks occur in windows or doors?

Definitely, leaks can occur around windows or doors due to factors like improper installation, faulty seals, or deterioration over time.

Can leaks be a result of poor construction or improper installation methods?

Yes, poor construction methods, improper installation of plumbing or roofing systems, or use of low-quality materials can all contribute to leaks.

Can leaks be prevented?

While not all leaks can be entirely prevented, regular maintenance and inspections, the use of quality materials, and proper installation methods can significantly reduce the risk.

Can the use of regular maintenance and inspections help prevent leaks?

Yes, regular maintenance and inspections can identify potential problems early, before they develop into significant leaks.

Can leaks be caused by natural disasters, such as earthquakes or storms?

Yes, natural disasters like earthquakes can damage pipes, while storms can damage roofs and windows, leading to leaks.

Can leaks be resolved through insurance coverage or claims?

Often, yes. Many insurance policies cover damage caused by sudden and accidental leaks. However, it’s important to check the specific terms of your policy, as not all types of leaks may be covered.

Our Equipment

Damp Meter

Purpose:

Takes comparative surface moisture readings across accessible walls, floors, ceilings and building joinery.

Common Uses / Notes:

Maps surface moisture profiles to help identify rising damp, penetrating damp, condensation, or active plumbing leaks.

Deep-Penetration Damp Meter

Purpose:

Detects moisture changes deep below the immediate surface of structural materials without destruction.

Common Uses / Notes:

Evaluates dampness within wall cores, beneath floorboards, inside subfloors and behind finishes without removing plaster.

Non-Invasive Moisture Scanner

Purpose:

Scans surface planes non-invasively without inserting pins or probes into decorated finishes.

Common Uses / Notes:

Checks decorated walls, tiled surfaces and delicate floor coverings to trace sub-surface water migration non-destructively.

HD Borescope Inspection Camera

Purpose:

Provides high-definition visual examination inside enclosed, narrow, or inaccessible building cavities.

Common Uses / Notes:

Inspects subfloor voids, wall cavities, dry lining and enclosed pipework to locate leaks and defects with minimal disruption.

4K Inspection Drone

Purpose:

Captures high-resolution imagery and video of high-level external structures and rooflines.

Common Uses / Notes:

Inspects roof tiles, chimney stacks, lead flashing, parapet walls, valleys and gutters to locate water ingress sources.

Air Humidity Sensor

Purpose:

Measures ambient air temperature and relative humidity (%RH) levels within living areas.

Common Uses / Notes:

Determines whether atmospheric moisture, cold bridging, or insufficient ventilation supports surface condensation and mould growth.

Thermal Imaging Camera

Purpose:

Visualises surface temperature differentials across walls, ceilings and floors.

Common Uses / Notes:

Detects cold spots, missing insulation, thermal bridges, evaporative cooling zones and concealed water leaks.

Airflow & Ventilation Detector

Purpose:

Measures volumetric air extraction performance (L/s or m3/h) of mechanical extractor fans.

Common Uses / Notes:

Tests kitchen, bathroom and utility fans to verify compliance with UK Building Regulations Part F and control condensation.

Gas Screening Instrument

Purpose:

Screens indoor environments for sewer gas intrusion, combustible gases and combustion concerns.

Common Uses / Notes:

Traces foul odours, soil stack leaks and sewer gases (H2S, NH3, CH4, CO, O2). Does not replace Gas Safe registered safety checks.

Chemical Vapour Detector

Purpose:

Screens air for Volatile Organic Compounds (TVOC/VOC) and chemical substances like formaldehyde (HCHO).

Common Uses / Notes:

Investigates unexplained chemical odours, building material off-gassing, post-flood air safety and indoor air quality.

Airborne Particle Detector

Purpose:

Measures airborne particulate concentrations across precise micron size ranges (PM1.0, PM2.5, PM10).

Common Uses / Notes:

Assesses fine dust, smoke, airborne matter and environmental air quality following water damage or mould outbreaks.

Electrical Socket & RCD Tester

Purpose:

Provides basic safety and protective circuit screening in areas affected by dampness.

Common Uses / Notes:

Identifies socket wiring faults, tests RCD trip functions and checks AC voltage in wet areas. Does not replace an EICR.

Survey Levels & Package Specifications

Level 1

Standard Damp Survey

Standard price: £299 + VAT

Promotional Price: £199 + VAT (Limited Time Offer)

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The Level 1 Damp Survey is a basic damp inspection designed to check the main accessible areas of the property for damp, leaks
and visible moisture-related issues.

Equipment Included

  • Damp meter

What Is Included

  • Inspection of walls
  • Inspection of floors
  • Inspection of ceilings
  • Leak inspection of drains and plumbing
  • Damp information and prevention guide

Best For

This survey is best for customers who need a basic damp check where only a damp meter is used. It is most suitable for simple

damp concerns, such as suspected rising damp, visible damp patches, minor moisture concerns or a general check of accessible
areas.

The Level 1 Damp Survey is suitable where the customer wants a straightforward inspection of walls, floors, ceilings, drains and
plumbing without the use of advanced survey equipment.

Level 2

Detailed Damp & Timber Survey

Standard price: £399 + VAT

Promotional Price: £299 + VAT (Limited Time Offer)

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The Level 2 Damp Survey includes everything in the Level 1 survey, with additional timber decay inspections and deeper
moisture testing.

Equipment Included

  • Damp meter
  • Deep-penetration damp meter for all building materials
  • Non-invasive moisture detection equipment

What Is Included

  • Inspection of walls
  • Inspection of floors
  • Inspection of ceilings
  • Leak inspection of drains and plumbing
  • Dry rot inspection
  • Wet rot inspection
  • Woodworm inspection
  • Deep moisture detection in building materials
  • Non-invasive moisture testing under floorboards and subfloors where accessible
  • Damp information and prevention guide

Best For

This survey is best for customers who need a damp and timber inspection. It is suitable where there may be concerns about damp,

wood rot, dry rot, wet rot, woodworm or moisture hidden behind building materials.

The Level 2 Damp Survey uses equipment that can read deeper into building materials, including areas such as subfloors, under
floorboards, behind panelling and other accessible hidden areas. This allows us to get a better understanding of whether there may
be hidden damp within the property without dismantling or damaging materials.

This survey is very suitable for home buyers and sellers who want a more detailed damp inspection before purchasing or selling a
property.

Specialised Laboratory Diagnostic Add-Ons

Add-On 1

Laboratory Analysis of Plaster Samples

Price £299 + VAT

Small plaster samples are carefully taken from affected walls and submitted to an independent laboratory for salt analysis. The laboratory tests for the presence and precise concentration of hygroscopic salts, including nitrates and chlorides.

Diagnostic Value: Soluble ground salts are drawn up through masonry during rising damp and remain in plaster permanently. Salt analysis scientifically differentiates true rising damp from condensation or historic leak contamination.

Note: Plaster sampling requires minor material removal and is our only add-on involving minor invasive work.

Add-On 2

Mould Laboratory Testing & qPCR DNA Analysis

Price £299 + VAT

Surface swab or lift samples are submitted to an accredited laboratory for advanced qPCR DNA analysis.

Diagnostic Value: Accurately identifies exact mould species, measures contamination concentrations and detects hidden fungal growth inside cupboards or behind dry lining. Delivers impartial scientific evidence to guide safe environmental remediation.

Add-On 3

Gases, Chemical Vapours & Airborne Particle Testing

Price £299 + VAT

Comprehensive environmental air quality and gas screening tailored to specific property concerns.

Screening Suite Includes: IAQ air quality assessment, Volatile Organic Compounds (TVOC/VOC), Formaldehyde (HCHO), Particulate Matter (PM1.0, PM2.5, PM10), Sewer Gases (H2S, NH3, CH4), Combustion Gases (CO, O2) and ventilation performance.

Diagnostic Value: Air quality issues are often linked to damp, leaks and mould, but they cannot always be identified by a visual inspection alone. This testing helps detect hidden airborne contaminants, gases, chemical vapours and fine particles that may affect the property’s condition and indoor environment. It can also help identify problems such as poor ventilation, sewer gas ingress, off-gassing from building materials, combustion-related gases, or airborne particles following water damage, providing a more comprehensive understanding of the property’s condition.

It is also useful where a property has persistent unpleasant or unexplained odours. The testing can help investigate foul smells caused by damp, water damage, stagnant water, drains, sewer gases or chemical vapours, allowing the source of the odour to be identified more accurately.

Testing includes:

  • Indoor Air Quality Testing- IAQ
  • Volatile Organic Compound Testing- TVOC / VOC
  • Formaldehyde Testing- HCHO
  • Fine Particulate Matter Testing- PM1.0 / PM2.5 / PM10
  • Dust and Smoke Particle Testing- PM1.0 / PM2.5 / PM10
  • Sewer Gas Testing- H2S / NH3 / CH4
  • Gas Leak Screening- CH4 / C3H8
  • Carbon Monoxide Testing- CO
  • Hydrogen Sulfide Testing- H2S
  • Ammonia Odour
  • Testing- NH3
    Oxygen Level Testing- O2
  • Ventilation / Stale Air Assessment- IAQ / TVOC
  • Drain Smell Investigation- H₂S / NH3 / CH4
  • Chemical Odour Investigation- TVOC / VOC / HCHO / NH3
  • Post-Leak Air and Surface
  • Condition Assessment- PM2.5 / TVOC
  • Combustion Gas Safety Screening- CO / O2 / CH4
  • Building Material Off-Gassing Assessment- TVOC / HCHO
  • Airborne Pollutant Screening- PM1.0 / PM2.5 / PM10 / TVOC