Independent Damp Surveys – A Deep Dive
Damp presents a real danger to London properties, especially in low-lying areas where clay causes moisture retention and if damp is unaddressed, it can cause damage that runs into the thousands. If you are planning to acquire a property in London, you need to be sure that the structure is sound and free from damp, mould and timber rot.
What does an independent damp survey involve?
Our independent damp survey is divided into 3 main types, which are:
- Level 1 – This entails a detailed inspection of external and internal walls, floors and ceilings, specifically looking for signs of damp and mould.
- Level 2 – All of level 1, plus a thorough inspection of timber structures such as roof joists and rafters.
- Level 3 – All of levels 1 & 2, along with the use of humidity testers, thermal imagery, ventilation flow tests, borescope cameras and drone images. A search for wet and dry rot, as well as woodworm, which is a destructive pest that eats timber from the inside.
- Additional lab test on plaster – An extra cost for the lab analysis of up to 10 samples taken from various locations in the house. This is a definitive way to test for moisture in plaster.
At London Damp Specialists, we take great pride in offering a professional service that is above industry standards. We cover all London Boroughs and areas within the M25.
How long does the survey take?
An independent damp survey can be completed in 3-4 hours, depending on the level and accessibility. There is nothing to pay in advance, once the survey is complete and you have the report in your inbox and we will send an invoice. All our surveyor needs is unrestricted access to the property and when it’s finished, you would never know the surveyor had been to your home.
Cutting-edge digital equipment used by damp surveyors
Our PCA independent damp surveyors use state-of-the-art digital devices to accurately measure moisture levels, which include the following:
- Damp meters
- Thermal imagery
- Humidity tester
- Ventilation flow tester
- Drone imagery
- Borescope cameras
Every qualified damp surveyor has all of these devices to assist them in the inspection of London properties, looking for any sign of damp, mould or timber rot.
When do I need an independent damp survey?
If you are thinking of buying a London property, this is the right time to contact London Damp Specialists on 020 7205 4886 or complete the online booking request form on this site and we will be in touch shortly. If you are planning to put your London home on the market, getting a professional damp assessment will reassure potential buyers that the property is free from damp, mould and timber rot.
The other time an independent damp survey is wise is when you notice any of the tell-tale signs of damp; early detection can save you a fortune in damp repairs and damp-proofing treatments. Some London homeowners have their home surveyed on an annual basis, which brings you peace of mind, knowing that the property is structurally sound and free from all forms of damp.
Damp Survey Costs
Transparent pricing with no hidden fees for our independent, unbiased surveys.
Level 1
What’s included:
- Inspection of walls
- Inspection of floors
- Inspection of ceilings
- Leak inspection of drains and plumbing
- Damp information and prevention guide
Level 2
What’s included:
- Everything in Level 1
- Dry rot inspection
- Wet rot inspection
- Woodworm inspection
- Damp information and prevention guide
Level 3 (Most Popular)
What’s included:
- Thermal Imaging
- Air humidity testing
- HD boroscope camera
- Brickwork pointing inspection
- DPC inspection
- Ventilation flow test on extractor fans
- 4K drone imagery roof, chimney stack
and guttering inspection - Structural condition inspection
- Inspection of walls
- Inspection of floors
- Inspection of ceilings
- Leak inspection of drains and plumbing
- Dry rot inspection
- Wet rot inspection
- Woodworm inspection
- Damp information and prevention guide
Survey Add Ons
Add On 1
Laboratory analysis Of plaster identifies hygroscopic salts such as chlorides and nitrates. which indicate whether damp is caused by rising groundwater or by plumbing leaks, This testing removes guesswork, allowing the exact source of moisture to be identified so the correct treatment is applied rather than carrying out unnecessary damp-proofing work.
Add On 2
qPCR DNA mould testing detects microscopic mould spores that are invisible during a normal inspection and van remain hidden behind walls, floors. or inside building rkaterials. It identifies the exact mould species present and the contamination level, allowing hidden mould problems to be confirrned and properly treated before they affect the property or occupants’ health.
Qualifications: All our surveyors are PCA and CSRT qualified for remedial treatments and also CSSW qualified for structural waterproofing.
Next day report: You will receive the report within 24 hours of the inspection taking place.
These are the tools we use
Damp Meter
A damp meter is a diagnostic tool used to detect and measure moisture levels within building materials such as plaster, brick, timber, and concrete.
Borescope camera
borescope camera is a small inspection camera attached to a flexible semi-rigid cable that allows you to see inside areas that are otherwise inaccessible.
Drone Inspection
A drone is a remotely operated aerial device equipped with a camera that allows visual inspection from above without the need for scaffolding or ladder.
Air Humidity Sensor
Air humidity sensor measures the amount of moisture present in the air, expressed as relative humidity (RH) in percentage. It helps determine whether indoor conditions are contributing to condensation, mould growth, or damp-related issues.
Thermal Imaging Camera
A thermal imaging camera detects temperature differences on surfaces by using infrared technology to produce a heat map image. In damp investigations, it helps identify cold spots, moisture intrusion, insulation defects, thermal bridging and leaks.
Air Flow Ventilation Detector
An air flow ventilation detector measures the movement and volume of air passing through vents, extractor fans, and air bricks. It confirms whether ventilation systems are working properly and achieving adequate air changes within a room. Poor airflow leads to trapped moisture, high humidity, condensation on cold surfaces, and ultimately mould growth.
Mould Lab Swab Testing
A mould swab test is carried out to confirm the presence of hidden mould growth and identify the specific species involved. Surface mould is not always visible, especially behind furniture, inside cavities, or within ventilation systems. Laboratory analysis of a swab sample determines whether active mould spores are present and what type they are, which helps assess potential health risks and decide the correct remediation approach rather than relying on visual assumption alone.
Lab Analysis of Plaster
Laboratory analysis of plaster is used to identify the type of salts present within the material, typically chlorides and nitrates. The presence and concentration of these salts help determine whether the moisture source is consistent with rising damp, ground contamination, or another forms [sic] of water ingress. such as mains water leak, This removes guesswork and prevents misdiagnosis, ensuring the correct remedial treatment is specified rather than applying unnecessary or ineffective solutions.
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