FAQs

Are there any career opportunities with your company?

We are always looking for keen trainees who want to become qualified tradespeople; work under supervision and part of the tenure would involve classroom learning. There will always be a demand for qualified surveyors and skilled damp proofers; you can expect a challenging and rewarding career.

 

Are you insured?

Yes, London Damp Specialists are fully insured for any damages caused by our teams. Our employees are trained to the highest standards and we are covered for every eventuality. London Damp Specialists is a family-owned business that serves London and the Home Counties and should you require a damp survey on your home, we offer a professional service at a very competitive price. Call today on 020 8528 3864 or fill in the form and we will be in touch shortly.

Can I take out insurance for damp repairs?

We work with a leading insurance provider, GPI and for additional cost, you can take out a 10-year guarantee. This is an insurance-backed guarantee that is separate from our 30-year guarantee.

Can the work be done when no one is at home?

Many customers are working full time and we try to fit in with your schedule, as long as we can access the property, it is not necessary for anyone to be at home when the work is carried out. We are happy to follow your instructions.

Can you carry out repairs when no one is at home?

If we have the property owner’s permission, we are happy to work in an empty house; indeed, many customers are at work when we are carrying out essential repairs and also surveys.

Can you detect moisture in walls?

We offer lab analysis of up to 10 plaster samples as an add-on to the homebuyer survey. We use moisture metres to test for moisture content in walls, which is very accurate and the surveyor would be able to trace the source of the moisture.

Can you repair a waterlogged basement?

Yes, we have the resources to tackle even the worst situations; our teams work efficiently to secure a building in an emergency; don’t hesitate to call us on 020 8528 3864 and we will do our best to contain the situation.

Can you treat dry rot?

We most certainly can; we can deal with all forms of damp, mould, condensation, wet and dry rot and mildew. We are London’s go-to damp specialists.

Can your damp proof employees work at weekends?

As mentioned previously, we are customer focused and that means we will do what it takes to complete the work in a timely manner. It is not uncommon for a team to work until late at night to finish the job; we are happy to work around your schedule.

Can your employees be trusted to work when the house has no occupants?

All our employees have been screened and are CRB/DBS check ready, so you do not have to worry about anything.

Do I have to pay a deposit for remedial work?

We do not require any advance payment when carrying out damp repair work. You pay nothing until the work is dry and the site is cleaned up.

Do I need to prepare for remedial work?

Specific areas of the house have to be empty, furniture must be removed and carpet may have to be removed or at least protected with sheeting. Basement tanking demands the space is empty and it might take a week before the work is complete; this is highly technical project, especially during a new build. You do not have to prepare for a survey; our surveyors will need access to all parts of the property.

Do the workmen clean up when they finish work?

Of course, our services include cleaning up and removing any waste that we generate; check out the many positive testimonials from our happy customers that mention how tidy our teams are when they are onsite.

Do we have to make an advanced payment?

We do not ask for any payment until the work is dry, when you are invited to inspect the area. The cost of the survey is deducted from the cost of the remedial work. There is nothing to pay until completion.

Do we receive a written report of the survey results?

Yes and this is normally issued with 1 working day of survey completion.

Do you do painting or refit skirting boards once the work is completed?

Often the skirting boards do not come off intact due to the damp so we usually recommend new skirting. We will leave your property ready for painting and making good, including fitting new skirting boards, but do not offer this service ourselves. We can put you in touch with someone to refit new skirting and to do the painting.

Do you repair woodworm?

Wood boring insects can cause serious damage to London properties, especially in older buildings, which contain a lot of timber. We offer a range of tried and trusted woodworm and dry rot repairs and our work is guaranteed for 30 years. Early detection is the key with woodworm and it might be that the timber cannot be saved and new timber needs to be fitted.

Do you replace skirting and architrave?

We do not replace rotten timber, however, we can put you in touch with painters, decorators and carpenters who are competent, fairly priced and reliable. We do, however, remove timber that needs to be replaced.

Does the roof need to be inspected during a damp survey?

Yes, the roof is an integral component of any structure and a lot of timber needs to be inspected. Our employees need to access the loft, you are not required to move anything in the loft, access is all we need.

Does the weather impact damp in houses?

Long periods of dull and wet weather create the perfect conditions for damp and mould to thrive and we haven’t seen the Sun for months. Heavy rainfall is sure to cause damp issues to older properties.

Does your company have full insurance?

London Damp Specialists are fully insured for every eventuality.

Does your company provide timber treatment?

We treat woodworm, wet and dry rot, mould, mildew and condensation, as well as all forms of damp. In the event the team feel a section of wood should be replaced, they would remove it and all waste is disposed of responsibly.

How early in the morning would your team arrive at my home?

This would depend on you; if you are at home, we would like to start by 9am if possible and our employees are fine with working unusual hours if a job requires it. We like to work to your schedule and can work independently.

How far can rising damp go?

In theory, damp can rise to the second floor, but generally 100-200mm before the issue would be noticed. Rising damp originates at ground level, so you should inspect the exterior walls at the ground level, looking for signs of crumbling brickwork or mortar. Mould is usually present or a green moss and check the entire perimeter of the building when looking for rising damp.

How long does a damp survey take?

It very much depends on the size of the property, the larger the house, the longer the survey will take; of course, we have to be thorough when it comes to moisture inspection, so our surveyors won’t be rushed. An average family home might be completed in 3-4 hours, but it really depends on some variables such as the weather, access and availability.

How much does damp proofing cost?

The cost of damp proofing varies according to a number of factors. These include the type of damp (rising or penetrating), the extent of the problem, the size of your property and many more. Visit our damp proofing costs page for more information.

How soon can you carry out damp repairs in my home?

In the event your property is in dire need of emergency repairs, we will do everything in our power to get a team to your address as soon as is practically possible. We understand that time is of the essence when it comes to water damage and we have the resources to carry out fast repairs.

If I am not buying a property, can I still arrange for a damp survey?

The short answer is yes. At London Damp Specialists, we offer an independent damp survey that is designed for homeowners, which also includes a written quotation for any remedial work that is required.

If I receive a legitimate quote for damp proofing services, will your company beat that quote?

Yes, at London Damp Specialists we are happy to beat any quote from a reputable company for damp proofing services.

If the house is unoccupied, can a survey be carried out?

Providing the surveyor can access all areas of the property, you do not need to be at home. We try our best to work to the customer’s schedule, minimising the inconvenience. Some customers leave a key in a concealed location, others leave the keys with a trusted neighbour.

Is black mould hazardous?

Black mould is extremely dangerous; prolonged exposure can cause skin irritations and respiratory issues. If you suspect mould of any sort is present in your home, call London Damp Specialists on 020 8528 3864 during office hours.

Is it possible to work on a building at any time of the year?

Damp surveys and remedial work can be carried out year-round and winter is likely to be less convenient for the occupants. Sometimes it is necessary to zone off the property until the work is completed.

Is it safe to leave workmen in my home or property when I’m not there?

Yes. All our employees have been home vetted and are CRB/DBS check ready.

Is there a waiting list for damp surveys?

Not usually, a survey can typically be completed within a few days of the request. We have enough certified damp surveyors to ensure that work can be scheduled quickly. Our process is efficient and if a customer has urgent need, we can usually accommodate them.

Is there a warranty on damp proofing services?

We are proud to issue a comprehensive 30-year guarantee. If any area that we have repaired requires further work, we are happy to carry out the work at no cost to the customer. This is a reflection of our high standard of workmanship and we have a great reputation within the industry.

Is there a warranty on your damp proofing services?

All our work is backed by an unconditional 30-year guarantee, which reflects the high standard of workmanship. In the event an area we repaired needs more work, we are happy to carry out the work at no cost to the customer. We do offer an additional independent damp insurance from GPI at very competitive premiums.

Is VAT included in the price?

All our prices are excluding VAT. For a list of services and prices, visit our homebuyer survey page.

We are purchasing a house with a basement, can we have the basement waterproofed?

Yes, and we offer a comprehensive basement tanking service, which comes in various forms, depending on the situation. A cavity membrane system is an effective way to waterproof a basement/cellar; our surveyor would inspect the basement and provide you with a written quote for the recommended work.

What are the signs of rising damp?

Rising damp can be identified by crumbling brickwork, masonry and mortar, damp patches on walls and ceilings, a musky small in the house, mould and mildew, while condensation on windows and walls indicate moisture in the air.

What are the visible signs that there are damp issues?

Signs include tide marks on the walls, damp or wet patches, crumbling plaster, mould and mildew growth, peeling wallpaper and a thin film of mould on walls. Crumbling masonry/ mortar on exterior walls is a sure sign of rising damp and the damp proof course (DPC) is likely compromised.

What areas of the UK do you cover?

At London Damp Specialists, we cover London and the Home Counties, which includes Berkshire, Buckinghamshire, Sussex and Oxfordshire.

What can I do to prevent condensation forming on the windows?

When you take a hot bath/shower, open a window to let the fresh air in and the condensation will dissipate; keep the door closed to prevent the moist air from mingling with the atmosphere. Water on the windows and frames should be removed with a dry cloth, while good ventilation will dissipate moisture in the air.

What do you require of me when you do a damp survey?

All we require is access to all parts of the building; if you are at work, if someone gives us access, that is all we need to carry out the service.

What does a homebuyer damp survey cost?

The cost depends on the level of survey you choose; check our homebuyer survey page for details and prices. We also offer an add-on service, lab analysis of plaster samples taken from various locations. The cost of the survey is deducted from the cost of the remedial work.

What does a homebuyer survey entail?

Our homebuyer survey has a total of 3 levels, plus we offer an additional service to carry out plaster analysis, which costs extra. For details on levels 1,2 and 3 and costs, check out our homepage.

What does a homebuyer survey entail?

Our homebuyer survey has a total of 3 levels, plus we offer an additional service to carry out plaster analysis, which costs extra. For details on levels 1,2 and 3 and costs, check out our homepage.

What equipment does a damp surveyor need to do his job?

Our surveyors have an array of tools, equipment and devices; thermal imaging cameras, moisture meters (both varieties), borescope cameras and they also use drone imagery. A surveyor would even have spares, while our damp proofing teams have fully equipped mobile workshops.

What happens with all the rubbish and waste?

We will remove and dispose of all the waste and rubble, leaving your property as we found it.

What is covered in the 30 year guarantee?

There is no fine print or grey areas in the London Damp Specialist guarantee. The areas we treat will be covered against damp for 30 years – so if damp arises in the same area then it will be repaired at zero cost to the customer.

What type of equipment does a damp surveyor use?

Our surveyors use state of the art equipment such as thermal imaging cameras, borescopes, moisture meters (pinned, pinless) and drone imagery. These devices enable the professional to accurately measure moisture levels and source the origin of damp.

When do we have to pay for the damp survey?

We do not require payment until the survey is complete; when we carry our remedial work, there is nothing to pay until the work area is dry and you are satisfied.

When would I receive the results of a damp survey?

We typically issue you a detailed written report within 24 hours of survey completion, along with a quote for any remedial work we recommend. Should you have any questions, you can call the surveyor; we typically email the survey report to the customer.

Why should I choose your company to carry out damp repairs?

We have a fantastic reputation within the industry, London Damp Specialists is a family-owned business and we have been servicing London and the Home Counties for years, providing a top service. Check out the many testimonials from satisfied homeowners to see how they feel about our services.

Will the remedial team work overtime to finish a job?

We are customer focused and if possible, we always work on until completion, of course, this is not always possible and when we do stop for the day, everything is neat and tidy.

Would my house insurance cover damp repairs?

A typical home insurance policy would cover damage caused by damp, but not the cost of the damp repairs; read the small print on your policy to find out what you are covered for.

Would the surveyor take photos?

Yes, our surveyors do take photos in order to show the customer specific areas.

Still have a question?
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Professional Damp Diagnostic Equipment

Electronic Moisture Meter

Purpose:

Takes comparative moisture readings from accessible walls, floors, ceilings and other surfaces to identify abnormal moisture patterns.

Common Uses / Notes:

Helps the surveyor map affected areas and identify patterns associated with rising damp, penetrating moisture, condensation and potential leaks. Readings support the survey but are not a diagnosis on their own.

Deep-Reading Moisture Meter

Purpose:

Investigates below the immediate surface of building materials without requiring extensive removal of finishes.

Common Uses / Notes:

Helps locate moisture within walls, beneath accessible floors, inside subfloor areas and deeper within the building fabric where hidden moisture is suspected.

Non-Destructive Moisture Scanner

Purpose:

Checks for changes in moisture beneath walls, ceilings and flooring non-invasively without puncturing or damaging the finished surface.

Common Uses / Notes:

Ideal for decorated walls, ceilings and flooring where pin testing would be undesirable. Useful for tracing water migration paths and comparing dry areas against suspected damp sections.

High-Definition Borescope Camera

Purpose:

Provides a close visual inspection of concealed or difficult-to-access spaces without opening up large sections of the building.

Common Uses / Notes:

Used beneath floors, inside wall cavities, behind linings and around hidden pipework to uncover leaks, hidden moisture, timber decay, or construction defects with minimal disturbance.

4K Aerial Drone

Purpose:

Captures high-resolution images of roofs, chimney stacks and other inaccessible high-level external areas.

Common Uses / Notes:

Inspects roof coverings, chimney stacks, flashing, guttering, parapet walls, valleys, high-level brickwork and difficult elevations to reveal defects linked to penetrating damp and water ingress. Subject to weather, safety rules and flight regulations.

Indoor Humidity Monitor

Purpose:

Measures the amount of moisture held within the indoor air (relative humidity and temperature).

Common Uses / Notes:

Helps determine whether high ambient humidity, insufficient ventilation, or surface condensation could be contributing to black mould growth and damp conditions.

Infrared Thermal Imaging Camera

Purpose:

Displays surface temperature variations across walls, floors and ceilings.

Common Uses / Notes:

Assists in identifying cold bridging, condensation risk, insulation irregularities, thermal patterns and hidden water leaks. Interpreted alongside physical moisture readings rather than treated as proof of damp on its own.

Ventilation and Airflow Tester

Purpose:

Tests the extraction performance and airflow velocity of mechanical extractor fans and ventilation outlets.

Common Uses / Notes:

Assesses extractor fans in kitchens, bathrooms and utility rooms to determine whether moisture-producing areas have sufficient extraction rate (L/s or m3/h) to control humidity, condensation and mould risk.

Multi-Gas Detection Equipment

Purpose:

Screens indoor air to identify certain gases present within the property.

Common Uses / Notes:

Supports investigations involving drain smells, suspected sewer gases (H2S, NH3, CH4), combustion concerns (CO, O2) and flammable gases (CH4, C3H8). Does not replace testing or certification by a Gas Safe registered engineer.

VOC and Chemical Vapour Monitor

Purpose:

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

Common Uses / Notes:

Useful when investigating unusual chemical smells, building material emissions/off-gassing, conditions following water damage, or general indoor air quality concerns.

Fine Particle Monitor

Purpose:

Measures airborne material and particle concentrations across precise size ranges, including PM1.0, PM2.5 and PM10.

Common Uses / Notes:

Supports investigations involving fine dust, smoke, poor indoor air conditions and environments affected by post-leak damage or extensive mould contamination.

Socket and RCD Testing Device

Purpose:

Provides limited, basic electrical safety and protective circuit screening during the inspection.

Common Uses / Notes:

Helps identify certain socket wiring problems, confirms the operation of Residual Current Device (RCD) protection and detects AC voltage in damp areas. Does not constitute a full electrical inspection or an Electrical Installation Condition Report (EICR).

Equipment & Inspection Levels

Level 1

Essential Damp Survey

Standard price: £299 + VAT

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

Repair Deduction: Full survey cost deducted if remedial work is instructed.

The Level 1 survey is an entry-level inspection of the main accessible areas. It is intended for relatively straightforward concerns involving visible damp, suspected rising damp or isolated moisture patches.

Equipment Provided

  • Electronic damp meter

Areas and Checks Included

  • Accessible walls
  • Accessible floors
  • Ceilings
  • Visible drain and plumbing leak checks
  • Damp information and prevention guidance

Recommended For

This option is suitable when a customer needs a basic assessment using a standard damp meter. It can be used for a general check or where there is a simple and clearly defined moisture concern.
The inspection covers accessible internal surfaces, drains and plumbing but does not include the advanced diagnostic instruments provided with the higher survey levels.

The survey price will be deducted if we undertake the recommended remedial work.

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Level 2

Enhanced Damp & Timber Survey

Standard price: £399 + VAT

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

Repair Deduction: Full survey cost deducted if remedial work is instructed.

The Level 2 survey includes the Level 1 inspection together with deeper moisture investigation and checks for timber-related deterioration.

Equipment Provided

  • Electronic damp meter
  • Deep-reading moisture meter
  • Non-invasive moisture scanner

Areas and Checks Included

  • Accessible walls, floors and ceilings
  • Visible drain and plumbing leak checks
  • Wet rot inspection
  • Dry rot inspection
  • Woodworm inspection
  • Deeper moisture readings from suitable building materials
  • Non-destructive moisture checks beneath accessible floors and within subfloor areas
  • Damp information and prevention guidance

Recommended For

It is appropriate for concerns involving wet rot, dry rot, woodworm, concealed dampness or moisture below finished surfaces.
The combination of deep-reading and non-invasive instruments allows the surveyor to gather information from subfloors, beneath accessible floorboards, behind suitable panelling and within other reachable concealed areas without unnecessary dismantling.

The Level 2 survey is a good choice for buyers and sellers who require a more detailed damp and timber assessment before proceeding with a property transaction.

The survey charge will be deducted from the cost of remedial work undertaken by us.

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Specialised Laboratory Testing Add-Ons

Add-On 1

Laboratory Analysis of Plaster Samples

Price £299 + VAT

(The cost of this add-on is deducted from your repair bill if we carry out the recommended remedial works).

Small plaster samples are carefully taken from affected walls and sent to an independent laboratory to analyse the concentration of hygroscopic salts (chlorides and nitrates).

Why it matters: Hygroscopic salts are carried by ground moisture during rising damp and remain in plaster even after masonry dries.

Diagnostic value: Differentiates true rising damp from condensation, rainwater penetration, or temporary plumbing leaks.

Note: Salt analysis can be particularly helpful when moisture-meter readings alone do not provide a sufficiently clear diagnosis. It may assist in distinguishing possible rising damp from condensation, water penetration or residual contamination caused by a historic leak. 

The results are considered together with the moisture profile, construction of the building, external ground levels, condition of the damp-proof course and other survey observations. This is the only additional service requiring minor invasive work because physical plaster samples must be collected. If we undertake the recommended remedial work, the survey cost will be deducted from the cost of that work.

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Add-On 2

Laboratory Mould & qPCR DNA Analysis

(The cost of this add-on is deducted from your repair bill if we carry out the recommended remedial works).

Surface swab or lift samples are submitted to an accredited laboratory for advanced qPCR DNA testing to identify exact mould species and spore concentrations.

Why it matters: Identifies toxigenic species (e.g., Stachybotrys chartarum) and concealed mould growth behind dry lining or furniture.

Diagnostic value: Establishes whether mould contamination is localised or widespread, enabling precise environmental remediation planning.

This service may be beneficial where:

  • A persistent musty smell is present
  • Mould repeatedly returns after cleaning
  • The property has experienced previous water damage
  • Contamination is suspected behind furniture or inside cupboards
  • Occupants have concerns about the indoor environment
  • The extent of visible mould is unclear
  • Independent laboratory evidence is required

Note: The results can help establish whether contamination appears isolated or more widespread. They may also assist with planning appropriate cleaning, removal, drying, ventilation or moisture-control measures.

Laboratory mould testing does not replace the need to investigate the moisture source. Mould is normally a symptom of excess moisture, condensation, leakage or inadequate ventilation, so the underlying cause must also be identified. If we carry out the recommended work, the survey fee will be deducted from the cost of that work.

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Add-On 3

Gas, Vapour & Airborne Contaminant Screening

Price £299 + VAT

(The cost of this add-on is deducted from your repair bill if we carry out the recommended remedial works).
Comprehensive environmental air quality screening for properties with persistent odours, post-flood contamination, or air quality issues.

Screening includes:

  • Indoor air-quality assessment – IAQ
  • Volatile organic compounds – TVOC/VOC
  • Formaldehyde – HCHO
  • Fine airborne particles – PM1.0, PM2.5 and PM10
  • Dust and smoke particles – PM1.0, PM2.5 and PM10
  • Sewer gas screening – H2S, NH3 and CH4
  • Flammable gas screening – CH4 and C3H8
  • Carbon monoxide – CO
  • Hydrogen sulphide – H2S
  • Ammonia – NH3
  • Oxygen levels – O2
  • Stale-air and ventilation assessment – IAQ and TVOC
  • Drain odour investigation – H2S, NH3 and CH4
  • Chemical smell investigation – TVOC, VOC, HCHO and NH3
  • Post-leak air and surface-condition checks – PM2.5 and TVOC
  • Combustion gas screening – CO, O2 and CH4
  • Building-product off-gassing assessment – TVOC and HCHO
  • General pollutant screening – PM1.0, PM2.5, PM10 and TVOC

Diagnostic value: Pinpoints the source of foul drain odours, chemical off-gassing and stale air problems linked to poor ventilation. It is also useful when a property contains a persistent foul, stale or unexplained smell. Odours can originate from damp building materials, stagnant water, contaminated drains, sewer gases, mould-related conditions or chemical vapours. Targeted screening helps narrow down the possible source and supports further investigation.

Note: Screening results do not replace specialist gas, environmental or medical assessments where these are required. The survey charge will be deducted if London Damp Specialists completes the recommended remedial work.

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Contact Us

If you have some questions, please complete this form:

Book and Pay for a survey

If you are ready to book a survey and pay, please complete this form:

Contact Us

If you have some questions, please complete this form:

Book and Pay for a survey

If you are ready to book a survey and pay, please complete this form: