5 Ways That Damp Can Damage your London Home
London sits on a bed of clay, which is called the Thames Valley Basin and with a mainly wet climate that we experience here in the UK, damp is a real threat to buildings. In this short blog, we take a look at some of the common ways that moisture can cause damage to your home.
- Missing roof tiles – Gale force winds can actually lift clay roof tiles and all it takes is a few missing or dislodged tiles to allow rainwater into the roof structure and if that goes unnoticed, it could cause a lot of damage to the joists and rafters. When we do an independent damp survey, we inspect the roof and the loft, looking for any signs of damp, mould and woodworm.
- Rotten window and door frames – Years ago, houses were built with softwood window and door frames and over time, they degrade and timber decay sets in, which allows damp to penetrate the exterior walls and damage the interior plaster. You might notice a musky smell in the house, which is caused by mouldy wood and this is a sign that you need an independent damp survey from London Damp Specialists.
- Rising damp – If the damp proof course is damaged in any way, moisture can creep up the exterior walls and that will eventually penetrate into the building causing damage to plaster. Tell tale signs include moss growth on exterior walls and peeling wallpaper; a chemical DPC can be injected into cavity walls, which acts as a moisture barrier. If you think your home might have a rising damp problem, book an independent damp survey and our damp expert will provide you with an accurate assessment and recommend the best treatment.
- Mould formation – Damp and humid conditions allow mould to thrive, which is definitely a health hazard. Mould can be green, black, brown of a creamy white and the black variety is the really dangerous one and can cause serious respiratory illness with prolonged exposure. Mould causes a stale, musky smell in the house and if you see any signs of mould, call us and book an independent damp survey and we will provide you with an accurate report the following day.
- Woodworm – Damp and humid conditions are ideal for woodworm; there are two types of wood consuming beetle that resides in the UK and they burrow small holes into wood to lay their eggs. When the larvae hatch, they consume wood pulp and unless measures are taken, the cycle continues. Once woodworm have been diagnosed, you need a woodworm expert to apply a chemical treatment that eradicates the eggs, the larvae and the adult beetles.
It is paramount that you arrange for an independent damp survey from a leading London damp survey company, as this is the only way to be 100% certain that your London home is damp and mould free. If you are planning to buy a London property, it makes total sense to survey the property for signs of damp, mould and timber rot.
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.
