Cluster Fly Control in Bristol and Surrounding Areas
30+ yrs
One fixed price, no surprises
From £180, repeat visits included
One fixed price for the whole job, including VAT, agreed before we start. Every repeat treatment is covered, including the follow-up most homes need the next autumn, so the bill never grows.
We come back until they’re gone
Sprays and smoke bombs only kill the flies you can see. We treat the whole loft and the gaps they use to get in, then come back for repeat treatments until they stop returning.
Little disruption to your home
Most of the work happens up in the loft. We’ll tell you how long to keep out of it afterwards, and if there’s anything to prepare before we arrive.
Outstanding service from start to finish. Quick to respond, showed up on time, and clearly knew exactly what they were doing. Ben and Rosie were a joy to deal with: professional, thorough, and took the time to explain everything. I couldn’t be happier with the results and would highly recommend them.
How We Get Rid of Cluster Flies
We start in the loft, finding where the flies are clustering and how they’re getting in.
The main treatment is ULV (ultra-low volume) fogging, which fills the loft with a fine mist of insecticide and reaches the corners, insulation and voids where the flies hide. We then treat the windows and entry points with a residual insecticide that stays active for up to three months, so the flies still arriving don’t get a foothold.
Cluster flies return to the same buildings every year, and one treatment rarely clears them completely, so control usually runs over two autumns. Most homes stop seeing them after the second treatment, and severe cases can take a third year. Every repeat treatment is included in your fixed price, so you won’t pay again when we come back. Bats are a protected species, so we always check the roof space for them first, and we won’t use chemical treatments where bats are roosting.
Our Guarantee
Unlike other pest control companies, we don’t charge per visit. Instead, we provide a fixed and fair quote for the problem, regardless of how long it takes, keeping us accountable to fixing the problem for good.
Who We Help
- Homes with flies in the loft or at upstairs windows
- Properties near fields, farmland and open countryside
- New builds on former farmland
- Landlords and rental properties
- Restaurants, cafes and food businesses with house flies
Why Choose Action Force?
A pest problem is stressful enough without poor communication or unclear pricing. You need to know the job will be done properly. With decades of experience, BPCA-certified technicians and a fixed-price guarantee, you know where you stand from the start.
Pest prevention for every home
We provide safe, swift, and effective treatments tailored to your property and its’ vulnerabilities, be it a new build flat or a centuries-old house.
10,000+ satisfied clients
We’ve helped over 10,000 homes and businesses since 1995, with straightforward advice, reliable treatment, and long-term prevention tailored to your property.
Fixed-price guarantee
No hidden extras and no guesswork. With us, you always know what you’re paying for.
BPCA certified technicians
Our team is fully trained, insured, and BPCA accredited for your peace of mind.
Signs You Have Cluster Flies
- Flies gathering at upstairs windows in autumn, or again on mild days in winter and early spring
- Large, slow flies that bumble into windows and lights instead of darting about
- Dead flies building up on window sills or across the loft floor
- A sickly smell in the loft or an upstairs room
- Flies crowding round ceiling lights and spotlights
Other Flies We Treat
We deal with house flies, bluebottles and fruit flies too. For these, we find and treat their breeding sites as well as the flies themselves. For commercial kitchens and food businesses, we can fog the whole area to clear flies quickly, with full documentation for your records.
Why Cluster Flies Come Back Every Year
Cluster flies lay their eggs in soil, and the larvae grow inside earthworms. In autumn, usually October and November as the first frosts arrive, the adults gather on sunny walls and squeeze in through lifted tiles, felt overlaps, vents and window frames to spend the winter in your loft or wall cavity.
They come back to the same buildings year after year, and the numbers grow each time. That’s why homes near fields and farmland, and new builds on former farmland, see them most.
Why DIY Treatment Rarely Helps
Vacuuming the flies off your windows helps for a day or two, and smoke bombs and sprays kill the flies you can see. None of them reach the clusters hidden deeper in the loft, insulation and wall cavities, so the infestation carries on and comes back bigger next autumn.
Cluster Flies or House Flies?
A cluster fly is a little larger than a house fly and a good deal slower, with a dark grey body and fine golden hairs across its back. At rest, its wings fold one over the other instead of sitting side by side. Cluster flies aren’t interested in your food or your bins, and they don’t breed indoors, so their arrival has nothing to do with how clean your home is.
Your pest control questions answered
Find quick answers to common pest control queries. For anything else, our team is here to help.
Still need help? Contact our support team.
Get a Quote Today
Reach out for expert pest advice or to schedule a service.
- info@actionforcepestcontrol.co.uk
- +44 117 444 9821
- DeskLodge Beacon Tower
Colston St, Bristol BS1 4XE
