Expert Mould Inspections Across London & Surrey
Identify mould type, health risk and moisture source — with independent written evidence.
What is a Professional Mould Inspection?
A professional mould inspection goes beyond simply identifying that mould is present — it systematically documents the extent of mould growth, identifies the species where possible, assesses the health risk to occupants, maps the moisture source driving the growth, and provides a detailed written report that can be used for insurance claims, housing authority complaints, legal proceedings or landlord compliance.
At Damp Mould Leak, our mould inspections are carried out by experienced specialists who understand both the technical aspects of moisture and mould diagnosis and the regulatory framework, including Awaab’s Law requirements for social housing providers.
Why a Professional Inspection Matters
Many properties have mould that appears contained to one surface but is actually extensive behind the wall, inside cavities or within floor and ceiling voids. A proper inspection identifies the true scale of the problem — which is frequently much greater than the visible area suggests.
Identify True Extent
We don’t just look at the visible surface. Thermal imaging and moisture meters allow us to map mould growth behind plaster, inside cavities and in hidden voids.
Species Identification
Where there is any uncertainty about the type of mould present — particularly whether toxic black mould (Stachybotrys) is involved — we can arrange laboratory analysis of surface samples.
Legal-Grade Reports
Our reports are structured to be usable as evidence in Housing Ombudsman complaints, local authority enforcement actions and civil legal proceedings.
Awaab’s Law Compliance
For social housing providers, we produce reports that meet the investigation requirements of the Social Housing Regulation Act 2023, with all findings documented to the required standard.
Insurance Evidence
Our reports provide the independent evidence insurers require to process claims for mould damage and associated health impacts.
Pre-Purchase Inspections
If you are buying a property with visible mould, our inspection will tell you exactly what you are dealing with before you commit.
What Our Inspection Covers
- Visual inspection of all rooms and accessible spaces
- Moisture meter readings at multiple points — walls, floors and ceilings
- Thermal imaging survey to identify hidden moisture and cold bridges
- Assessment of ventilation adequacy — extractor fans, airbricks, trickle vents
- Identification of all mould-affected surfaces with photographic evidence
- Assessment of mould type and health risk rating
- Root cause analysis — identifying the moisture source
- Full written report with recommended remediation and costings
- Report delivered within 24 hours of inspection
How is a mould inspection different from a damp survey?
A damp survey focuses on diagnosing moisture problems in the building fabric. A mould inspection focuses specifically on the mould — its extent, type, health risk and cause. In practice, most of our inspections combine both elements.
Can you tell what type of mould it is?
We can identify visible mould characteristics and assess likely species from their appearance and growth patterns. For definitive species identification, we arrange laboratory analysis of surface samples, which we can include in our inspection service.
How quickly can you inspect?
We typically offer inspection appointments within 2–5 working days. Emergency inspections may be available for urgent situations.
Ready to Get Started?
Surveys available across London and Surrey. Same-day attendance available.
Frequently Asked Questions
How long does a damp survey take?
A standard residential damp survey takes 1–2 hours depending on property size. We check all accessible areas including loft space (if safe and accessible), subfloor (if there is a suspended floor), external walls, internal walls, and roof. The written report with moisture readings is provided within 24–48 hours.
Is black mould dangerous?
Black mould — particularly Stachybotrys chartarum — produces mycotoxins that are harmful to health, especially in children, elderly people, and those with respiratory conditions. Even common mould species (Aspergillus, Penicillium, Cladosporium) found in damp UK properties can cause allergic reactions and respiratory problems. Professional treatment and resolution of the underlying damp cause is strongly recommended.
What are the signs of a hidden water leak?
Signs of a hidden leak include: unexplained wet patches on walls or ceilings with no obvious source, water meter turning when all taps are off, low water pressure, musty smells in rooms with no visible damp, and damp patches that appear and disappear. Acoustic and thermal imaging leak detection can locate hidden leaks without unnecessary damage.
Can you treat mould without a survey first?
We recommend a survey before treatment in most cases — particularly for severe or recurring mould, or where the cause is not clearly condensation. Treating mould without identifying the cause risks the mould returning quickly. For straightforward condensation mould in well-ventilated rooms, a survey may not always be necessary — call us and we will advise based on your specific situation.
Do you offer a written guarantee on damp treatment?
Yes. Our rising damp treatment (chemical DPC injection) comes with a CIGA-backed 20–30 year guarantee transferable to new owners. Mould treatment and condensation control systems carry a 1–2 year guarantee on the treatment itself. All guarantees are documented in writing.