The Many Moulds That Attack London Homes: An Overview

We have a wet and dull climate here in the UK and that creates an ideal environment for mould and mildew to grow. Parts of London sit on a combination of clay and bedrock and heavy moisture content is usually the result; if the environment is right for fungal growth, any of the following could appear in your London home.

  • Penicillium – Greenish-blue and white mould, which can grow on walls, ceilings and even fabric. Known to cause allergies and breathing problems, call in the professionals to deal with this fungus.
  • Aspergillus – Typically green, brown or yellow, found on damp walls and window frames. A dank smell is usually present and this fungus can spread quickly in still and humid environments.
  • Black mould – Stachybotrys is the official name; prolonged exposure to black mould can lead to serious respiratory disease. Commonly found in dark places with long-term damp, we recommend vacating the room(s) until we have finished the remedial work and the area is fungi-free.
  • Cladosporium – Dark green or black mould found on damp surfaces; lack of ventilation helps this mould to replicate; a good airflow helps keep it in check.
  • Alternaria – A fuzzy and fluffy texture, typically found in kitchens and bathrooms. Clean away visible mould with powerful cleaning agents and ventilate the room well.
  • Chaetomium – A white, fluffy material that is found in wet and dark places; associated with heavy water damage, the damp issue needs to be fixed first, then cleaning and repainting would solve the issue.
  • Aureobasidium – Typically pink or brown and is found on damp timber, this fungus needs to be removed, then the timber prepared and repainted.

We recommend taking a proactive approach to damp and mould; call London Damp Specialists on 020 7458 4864 and we will be in touch to arrange a comprehensive damp inspection.

Mould and mildew are health hazards

If a person has extended exposure to mould in a closed environment, this can have a negative impact on your health; the fungi release minute spores that stay airborne and inhalation is unhealthy. If you have been away for a few weeks and when you returned, you noticed a dank smell in the house, examine every room carefully, looking for any visible signs of fungal growth.

Identifying the source of moisture

Aside from cleaning up and removing the fungi, you need to identify the root cause and carry out damp proofing repairs. Our damp surveyors use cutting-edge equipment to determine the presence of moisture and mould and we quote for recommended remedial work. If rising damp is the problem, the damp proof course should be inspected; it is a thick black line between floor level brickwork, older homes have bitumen-based DPC membrane, while newer builds (post-1970s) use a heavy-duty plastic that lasts for many years.

Be proactive and arrange for one of our damp surveyors to inspect your home; we issue a detailed written report within 24 hours of finishing the inspection.

Call on 020 7458 4864 or enter the required information in our online form and we’ll be in touch!

Damp Survey Costs

Transparent pricing with no hidden fees for our independent, unbiased surveys.

Level 1

Level 1

£199 + VAT

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

Level 2

£299 + VAT

What’s included:

  • Everything in Level 1
  • Dry rot inspection
  • Wet rot inspection
  • Woodworm inspection
  • Damp information and prevention guide

 Survey Add Ons

Add On 1

£299 + VAT
Lab Analysis Of Plaster

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.

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Add On 2

£299 + VAT
Mould Lab Swab Testing, qPCR on DNA

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.

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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.

The survey fee will be deducted from the cost of any recommended repairs.

These are the tools we use

A damp meter

A 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

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.

Inspection Drone

Inspection Drone

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

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

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

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 Swab Test Kit

Mould Swab Test Kit

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.

Plaster Salt Analysis Lab

Plaster Salt Analysis Lab

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.

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:

Book Survey

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:

Book Survey

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:

Book Survey