Rodent and bed bug treatment guarantees are structured differently because the two pests behave differently. A rodent guarantee normally depends on proofing, because rats and mice re-enter a building from outside. A bed bug guarantee normally depends on customer preparation and attendance at every follow-up visit, because bed bugs are carried in and then hide.
No. The two guarantees rest on different conditions because the two infestations have different origins.
A rodent guarantee is normally conditional on proofing being carried out, because rats and mice arrive from outside through gaps, drains, defective airbricks and pipe penetrations. Kill the population inside and leave the route open, and a new population uses it. The condition is structural: seal the entry points, or the guarantee lapses.
A bed bug guarantee is normally conditional on the customer's preparation and on the follow-up visit being attended, because bed bugs do not walk in from the street. The condition is behavioural: launder and bag what you are told to, and be there for visit two.
A rodent guarantee depends on proofing because rodents re-enter from outside, so killing the current population without closing the entry route guarantees nothing. Proofing is the physical exclusion work that seals a building — wire wool and mortar at pipe penetrations, steel plate over gnawed timber, mesh over airbricks, and repair of defective drains. A mouse needs a gap the width of a pencil, and a rat will use a cracked drain run nobody can see from a kitchen floor.
The Campaign for Responsible Rodenticide Use (CRRU) UK Code of Best Practice requires professional rodenticide bait to be secured against children, pets and non-target wildlife, inspected at appropriate intervals with the findings recorded, and removed at the end of the treatment with any rodent bodies. Permanent baiting is restricted under the CRRU code to specifically justified and documented circumstances, so bait cannot be left down indefinitely in place of repair work.
A rat problem also carries a reporting duty. An occupier must notify the local authority of a substantial infestation of rats or mice on land they occupy. Bed bugs carry no equivalent duty.
A bed bug guarantee depends on the customer because the treatment only works if preparation is done properly and the follow-up visit happens. Bed bugs are carried into a property, hide in seams, joints and voids within a few metres of where people sleep, and lay eggs that commonly survive a single insecticide application.
Preparation is the work the occupant does before the technician arrives: laundering bedding at a high temperature, bagging clothing and textiles, pulling furniture off the walls, and clearing floors so skirting and bed frames can be reached. Launder nothing and the insects and eggs in the bedding survive the visit.
The follow-up visit is not padding. With a residual insecticide programme, newly hatched insects have to walk over treated surfaces after they emerge, so a second visit — typically 10 to 21 days after the first — is part of the treatment rather than an extra. Skip visit two and the job was never finished.
Treatment method changes the guarantee because heat and steam kill all life stages, including eggs, in a single controlled application, whereas residual insecticide needs a treatment cycle to catch insects that hatch afterwards.
Heat treatment raises the air and contents of a room to a lethal temperature and holds it there for a measured period, killing eggs, nymphs and adults together. Steam applies heat directly to seams, joints and skirting. Neither leaves a residue, so neither protects against a fresh introduction next week — but both remove the egg-hatch problem that makes a second visit necessary. Firms covering Greater London commonly offer heat and steam alongside conventional insecticide treatment.
Residual insecticide works the other way round. Products are approved for either amateur or professional use, and a professional product may be applied only in accordance with its approved label. The label sets the dose, the surfaces it may be applied to and the intervals between applications, so the product dictates the number of visits rather than the technician's diary. That is also why turnaround is a question about method rather than about the diary: heat can finish a room in a single day, while a residual programme cannot be completed any faster than the eggs choose to hatch.
Rodents in a terraced or converted London property are the harder of the two, because the neighbouring property is outside everyone's control. Both guarantees are conditional, but a bed bug infestation in a self-contained flat is a closed system and a rat run through a Victorian terrace is not.
Shared walls, shared floor voids, shared soil stacks and shared underground drain runs are the London-specific variable. A technician can proof the flat they were called to, and rats will keep arriving through the neighbour's broken gully or the vacant shop below. No honest guarantee covers a defect in a building the guarantor has no right to enter. Bed bugs in a converted property carry a milder version of the same risk, because they travel along pipe runs and service holes between flats.
A rodent job is an exclusion job with a kill attached; a bed bug job is an eradication job with preparation attached. The table sets out the points that decide whether either guarantee holds.
| Point of difference | Rats and mice | Bed bugs |
|---|---|---|
| How they arrive | From outside: gaps, drains, defective airbricks, pipe penetrations, shared voids | Carried in on luggage, second-hand furniture, bedding, clothing |
| What the treatment involves | Survey, secured bait or trapping, monitoring visits, then proofing and repair | Insecticide programme with a follow-up cycle, or heat and steam in one application |
| What the guarantee normally depends on | Proofing carried out and building or drainage defects repaired | Preparation completed and every follow-up visit attended |
| What typically voids it | Refusing the proofing quote, accessible food waste, blocked access for monitoring | Laundering nothing, moving infested items between rooms, missing visit two |
| Outside anyone's control | The neighbouring property, shared drains, council land, external food sources | A fresh introduction from a hotel, a visitor or a second-hand purchase |
247 Pest Control publishes rat control and mice control from £214 and bed bug control from £234 as starting points for straightforward domestic treatments in Greater London, and names the variables that move the final figure: pest type, property size, infestation level, visits needed, treatment method, access and urgency. A published starting price says nothing about how many visits are included, so ask that separately.
Ask for the conditions in writing before work starts, because a condition explained on the doorstep is unenforceable and a condition in the report is not. Timing belongs in the same conversation: 247 Pest Control states that same-day attendance is available across London and responds to emergency enquiries 24/7, while noting that attendance time cannot be identical for every call. What the visit produces is a species identification, a recommended treatment, and the earliest date that treatment can go ahead.
Four items belong in the paperwork:
Ask for the preparation list first, because four items have to be in writing before the first visit.
Consumer rights sit underneath any guarantee a firm chooses to offer. A pest control service must be performed with reasonable care and skill whatever the guarantee says, and where it is not, the customer can require the work to be done again. The British Pest Control Association (BPCA) publishes Codes of Best Practice for its audited members, and membership is checkable on the BPCA's own member register.
No. There is no requirement in the United Kingdom for a pest control firm to offer a guarantee. Consumer rights apply either way: a service must be performed with reasonable care and skill, and where it was not, the customer can require the work to be done again at no extra cost. A guarantee is a contractual extra.
Not meaningfully. Rats and mice enter from outside through gaps, drains and defective airbricks, so a treatment that kills the population without closing the route has not removed the cause. A guarantee offered on that basis covers an outcome the firm cannot control. Ask for the proofing quote in writing.
Bed bug eggs commonly survive a single residual insecticide application, so insects hatching afterwards must contact treated surfaces to be killed. The second visit typically falls 10 to 21 days after the first, with the interval set by room temperature and the product label. Heat and steam treatment kills all life stages in one application instead.
Yes, if the infestation is substantial. An occupier must notify the local authority of a substantial infestation of rats or mice on land they occupy, and the authority in turn has a duty to keep its own land free of rats and mice. No equivalent reporting duty applies to bed bugs.
Shared structure. Terraced and converted London properties commonly share drain runs, floor voids, roof spaces and party wall cavities, so rats can enter through a defect in a neighbouring property that no technician has the right to inspect or repair. Proofing one flat does not close a route running through the building.