Why Independent Damp Surveys Are Essential When Buying a London Property
London sits on a bed of mainly clay, which is the Thames Valley Basin and this means a high degree of water retention, especially in certain low-lying areas where ground moisture is a real problem. Rising damp can cause thousands of pounds worth of damage and it is not difficult to conceal damp damage; a few coats of paint is all it takes. The last thing you want is to discover the property has damp issues after you have completed the purchase and in order to be absolutely sure the property is free from damp, mould and timber rot, you should book an independent damp survey from London Damp Specialists.
Multiple damp survey levels
We offer 3 main levels of damp survey, which are as follows:
- Independent damp survey level 1 – This is designed for a potential buyer or seller and includes a thorough inspection of all external and internal floors, walls and ceilings, looking for signs of damp and mould. If the survey shows the property is free from damp, then you can move ahead with some confidence.
- Independent damp survey level 2 – This includes all of level 1 plus a thorough inspection of internal roof timbers and other timber structures. Woodworm and wet and dry rot cause a lot of damage if not addressed and our survey is the best way to find out if damp is present in the building.
- Independent damp survey level 3 – The most extensive of our damp surveys, all of levels 1 & 2, plus we use hygrometers, thermal imagery, borescope cameras and drone imagery to accurately assess a building for damp, mould, woodworm and timber rot.
- Additional lab test of plaster – For an additional fee, we will lab test up to 10 plaster samples for proof of moisture content. This might be required for a home insurance claim or a buyer insists on the tests.
We understand that time is of the essence when buying or selling London property and we can usually carry out the survey within a few days of the booking. The customer receives a detailed survey report in their inbox within 24 hours of survey completion.
Damp-proofing in London
While we only carry out independent damp surveys, we do have a close working relationship with the best damp-proofing company that covers all London Boroughs; they are proud to issue a comprehensive 30-year guarantee. If damp returns to an area, the company will fix it at no cost to the customer, which brings peace of mind.
If you are planning to put your London home, book an independent damp survey with London Damp Specialists; call us on 020 7205 4886 or complete the survey request form on this website and one of our certified damp surveyors will inspect your home and provide you with a full report that you can show to potential buyers.
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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