When it comes to exterior cleaning and biological treatments, not all products — or providers — are equal. At Gosfield Exterior Cleaning, we believe it’s important for customers to understand what HSE licensed biocides are, how they are regulated, and why proper training and compliance are not just best practice, but a legal requirement.
Biocides are powerful tools when used correctly. When used incorrectly or unlawfully, they can pose serious risks to people, property, and the environment.
What Are HSE Licensed Biocides?
HSE licensed biocides are chemical products designed to control or eliminate harmful organisms such as:
- Algae
- Lichen
- Moss
- Fungi
- Mould
- Bacteria
Before these products can be used legally in the UK, they must be assessed, approved, and authorised by the Health and Safety Executive (HSE). This process ensures that each product meets strict standards for:
- Safety
- Effectiveness
- Environmental impact
Only products that pass this assessment are permitted for use as biocides.
Why Are HSE Licensed Biocides So Important?
HSE licensing exists to protect:
- Homeowners and customers
- The wider public
- The environment
- Legitimate, professional contractors
Unlicensed or incorrectly used products can cause chemical burns, environmental contamination, plant damage, and long-term surface deterioration. If a product used as a biocide is not listed on the COPR database, its use is unlawful.
Licensing helps prevent rogue operators from using inappropriate or dangerous chemicals while claiming professional standards.
How Are Biocides Regulated in the UK?
Biocides in the UK are regulated under the Biocidal Products Regulation (BPR). This framework ensures that products placed on the market:
- Are safe for people and animals
- Are effective for their intended purpose
- Do not pose unacceptable environmental risks
The HSE is responsible for:
- Evaluating biocidal products and active ingredients
- Granting authorisations
- Monitoring compliance
- Enforcing regulations
This oversight maintains high standards across the industry.
COSHH: Why Training Is a Legal Requirement
Any professional handling biocides must comply with the Control of Substances Hazardous to Health (COSHH) regulations. COSHH training is not optional — it is a legal obligation.
Through COSHH training, professionals learn how to:
- Assess chemical risks correctly
- Handle and apply products safely
- Store chemicals appropriately
- Use correct personal protective equipment (PPE)
- Interpret hazard symbols and safety data sheets
- Dispose of chemicals responsibly
Just as importantly, failing to undertake recognised training can invalidate a contractor’s insurance, leaving customers exposed if something goes wrong. Always check that your provider is properly trained and compliant.
What Is the COPR Database?
The Control of Pesticides Regulations (COPR) database is maintained by the Chemicals Regulation Division (CRD) of the HSE. It is the official record of biocidal products authorised for use in the UK.
The database includes:
- Product names
- Active ingredients
- Approved uses
- Authorisation status
If a product does not appear on the COPR database, it is not legally authorised for use as a biocide.
How Can You Check If a Biocide Is HSE Licensed?
You can verify whether a product is approved by:
- Searching the COPR database
- Checking the product label for a valid HSE authorisation number
Reputable professional-use products will always display this information clearly.
Are There Different Types of HSE Licensed Biocides?
Yes. HSE licensed biocides cover a wide range of applications, including:
- Disinfectants
- Algaecides and fungicides
- Insecticides
- Rodenticides
- Preservatives
- Antifouling treatments
Each product type is formulated to target specific organisms and must only be used for its approved purpose.
Are There Alternatives to Chemical Biocides?
In some situations, non-chemical methods can be effective, such as:
- Hot water cleaning
- Mechanical removal
- Controlled pressure washing
These methods can reduce reliance on chemicals, but they do not always provide the same long-term control of biological growth. In many cases, a carefully selected and legally approved biocide delivers the safest and most effective result.
Can Biocides Be Used in Domestic Settings?
Yes — some HSE licensed biocides are approved for domestic or consumer use. These products are formulated at lower strengths and must be used strictly in line with manufacturer instructions.
Professional-use-only biocides, however, are restricted for a reason and should only be handled by trained, competent contractors.
Why This Matters to Homeowners
Choosing a contractor who:
- Uses HSE licensed products
- Appears on the COPR database
- Has completed COSHH training
- Holds valid insurance
is not just about quality — it’s about safety, legality, and accountability.
Untrained use of unlicensed products can cause damage that is expensive, dangerous, and often not covered by insurance.
Where Can You Find More Information?
For official guidance and verification, the best sources are:
- The Health and Safety Executive (HSE) website
- The Chemicals Regulation Division (CRD) portal
These provide up-to-date regulatory information, approved product lists, and safety guidance.
Final Thoughts
HSE licensed biocides and COSHH training exist to protect everyone involved — from contractors and homeowners to the environment itself. At Gosfield Exterior Cleaning, we follow these regulations because they matter.
Proper training, approved products, and legal compliance are not optional extras — they are the foundation of safe, professional exterior cleaning.
Where Professional Biocide Treatments Are Used
Biocide treatments are widely used across exterior cleaning to control moss, algae, lichen, and mould. They are most commonly applied during roof cleaning to slow moss regrowth, during render cleaning to remove and prevent algae and mould staining, and during driveway and patio cleaning to help prevent green surface growth returning quickly.
Used correctly and safely, professional biocides help deliver longer-lasting cleaning results while protecting exterior surfaces.
