A guide to ant treatment.

Professional treatment goes beyond off-the-shelf sprays. It involves identifying the specific species, locating the nest, and using commercial-grade baits that the workers carry back to the queen to ensure the entire colony is eradicated at the source.

What Does the Work Involve?

• Site Survey: A thorough inspection to identify the ant species and track "trails" back to entry points or nesting sites.
• Species Identification: Determining if you have standard garden ants or invasive species like Pharaoh ants, which require different chemical approaches.
• Baiting: Deploying professional-grade insecticidal gels that ants consume and share with the colony and queen.
• Residual Barriers: Applying specialist sprays or dusts to skirting boards, door frames, and external air bricks to prevent re-entry.
• Void Treatment: Injecting foams or dusts into wall cavities or under floorboards if the nest is internal.
• Proofing Advice: Identifying structural gaps, such as leaky pipes or cracked masonry, that are attracting pests.

Typical Costs

Most professional ant treatments in the UK are charged as a fixed-price package covering the initial visit and a follow-up. Costs vary based on your location and the severity of the infestation.

Prices generally include VAT and all professional-use chemicals. Factors that increase the price include the size of the property, the need for specialist equipment to reach lofts or crawl spaces, and the number of follow-up visits required for stubborn species.

How Long Does It Take?

• Initial Inspection: 30 to 45 minutes to identify trails and nesting sites.
• Standard Treatment: 1 to 2 hours for a typical three-bedroom semi-detached home.
• Eradication Period: 7 to 14 days for baits to take full effect and kill the queen.
• Follow-up Visit: Usually scheduled 2 weeks later to ensure no new activity is present.

DIY or Professional?

For a few garden ants in the summer, supermarket sprays or boiling water on an outdoor nest may suffice. However, if ants are appearing in kitchens or bathrooms during winter, you likely have an internal nest that DIY products cannot reach.

Warning: Never use DIY sprays on Pharaoh ants. This species reacts to "threats" by splintering into multiple new colonies (a process called budding), making the infestation significantly worse.

Professional technicians have access to high-concentration baits and growth regulators that are not available to the general public. If your infestation is persistent or involves tropical species, professional help is essential to avoid wasting money on ineffective retail products.

Choosing the Right Tradesperson

• Check Qualifications: Ensure the technician holds an RSPH (Royal Society for Public Health) Level 2 Award in Pest Management.
• Trade Bodies: Look for membership in the BPCA (British Pest Control Association) or NPTA (National Pest Technicians Association).
• Insurance: Confirm they hold valid Public Liability Insurance (minimum £2 million).
• Questions to Ask:
  • Is the treatment safe for my pets and children once dry?
  • What species of ant have you identified?
  • Does the price include a follow-up visit if the ants return?
  • How long do I need to stay out of the treated rooms?

UK Regulations

• COSHH (2002): Professionals must provide a Control of Substances Hazardous to Health assessment for any chemicals used on your property.
• Biocidal Product Regulation (BPR): All chemicals used must be UK-authorised for professional pest control.
• CRRU Code: While more relevant to rodents, professional pest controllers follow the Campaign for Responsible Rodenticide Use guidelines for general environmental safety.

Common Problems

• Ignoring the Source: Spraying visible ants only kills the "workers." If the queen survives, the colony will simply produce more ants.
• Poor Hygiene: Even after treatment, leaving crumbs or sugary spills will attract new colonies from neighbouring gardens.
• Moisture Issues: Ants are attracted to damp wood and leaky pipes; failing to fix a leak often leads to a repeat infestation.
• Interfering with Baits: Homeowners often wipe away professional gel baits thinking they are dirt, which stops the treatment from working.

Frequently Asked Questions