Survey before sealing
Ask an inspector to identify possible access routes and whether activity is inside. Sealing the wrong opening without a plan can leave the underlying route unresolved.
Prioritise lasting repairs
Review pipe penetrations, door thresholds, vents and damaged masonry. The material and method should suit the building and maintain required ventilation or drainage.
Verify the outcome
Record completed work and continue monitoring. If signs recur, revisit adjoining properties, drains or shared spaces where relevant rather than repeatedly treating the same room.
Related pest guides
Rats & Mice
Recognise rodent signs and understand inspection, treatment and proofing.
Read guide
Bed Bugs
Check bedding and furniture signs, preparation and follow-up questions.
Read guide
Cockroaches
Identify kitchen activity and understand monitoring and prevention.
Read guide
Wasps
Assess a suspected nest safely and prepare for professional identification.
Read guideFurther information
- NHS: bedbugs and bites
- Government: renting a safe home
- British Pest Control Association: pest advice
- Find your local council
- Safer food, better business for caterers (FSA)
- HSE: rodenticides
Published by Pest Protect London. Updated 9 September 2026. General information; treatment decisions require an assessment of the property. Editorial policy.