Essex & Herts Pest Control offer a broad spectrum pest control treatment eradicating cluster flies from homes throughout Essex & East Hertfordshire.
In accordance with the Control of Pesticides Regulations 1986 & 1987, we operate to the highest standards in pest control, technicians are RSPH/BPCA accredited and DBS security checked, ensuring you and your home are in safe knowledgeable hands at all times.
Stocked with the latest pesticides and technologies we ensure your cluster fly problem will be eradicated professionally.

Cluster flies usually start to become a problem during the last week of October first week of November and target rural and semi rural properties and colonise inner south and east facing roof elevations. Dopey cluster flies loitering around inner window frames and window sills and the daily hoovering up of flies is the classic hallmark of a new cluster fly problem.

It is very common for home owners to experience cluster fly problems annually with flies habitually returning year on year migrating in from surrounding agricultural land. 

Cluster fly treatments are carried out in late afternoon when daylight is fading or when it's dark, ensuring all cluster flies are inside loft spaces and recess voids when we carry out our treatment.

For help and information on how our cluster fly treatment works or to make a booking please call 0800 612 7708 or contact us online.


A comprehensive ULV treatment will be carried out in your loft to eradicate the problem. If your property has no loft, and is converted to the ceiling, beams/rafters, an effective ULV treatment can still be carried out.
We will ask you to vacate your premises whilst the treatment is being carried out and then there will be a short timed delay before you can re-enter the premises.


Cluster Flies are also known as 'Attic Flies' occupying loft space and wall cavities. If in doubt as to whether you have cluster flies, their numbers give them away, they usually are in their hundreds and thousands and tend to return to the same location annually! Adults live harmlessly outdoors in the summer months but then target rural semi rural buildings usually the last two weeks of October or first two weeks of November and in vast numbers.
Cluster flies tend not to cause problems with properties in more urban locations.


During summer and early autumn they are of no consequence. As the season cools they seek shelter in and around buildings. As the temperature drops, cluster flies search for more long term protection, targeting south and east facing parts of buildings and consequently forming clusters in loft spaces. Once inside, the shear numbers entering lower living space can be extremely irritating for home owners. Many home owners will have a go at trying to deal with the problem by using fly sprays on upper and lower levels and experience and endless hoovering to try remove the problem. A cluster fly problem requires professional solution targeting the very root of the problem.


Egg: laid in damp soil or vegetation. They hatch in approx a week.
Larva: soon after emerging they seek out and parasitise earthworms, which are eventually killed. Develop in several weeks.
Pupa: In soil.
Adult: black in colour with fine gold hairs on thorax, approx 6mm in length. Often 2 generations per year.