Cluster fly control is best achieved by finding and treating resting sites and harbourages and then applying a residual insecticide to alighting surfaces and activating foggers or smoke bombs to fumigate the area and flush out cluster flies.
If initial cluster fly treatment is carried out in the autumn months, a follow-up in the spring is often advisable.
Step-by-step instructions on how to carry out a successful cluster fly treatment
To carry out a cluster fly treatment you should first remove children and pets from the area to be treated and cover any water storage tanks. We recommend that a safety mask and gloves are worn at all times when handling any pesticides.
We recommend that you check roof spaces for bats or evidence of bats. If you find evidence of bats then you are obliged by law to contact either English Nature, Scottish Natural Heritage or the Countryside Council for Wales, as appropriate, before carrying out any insecticidal treatment to the area. Advice can also be obtained from the Bat Conservation Society on 0845 1300 228.
Before fumigating, calculate the volume of the room or roof space to be treated and use the dosage appropriate to this volume according to the recommendations for flying insects. Apply at a rate of one Fogger per 150 cubic metres or one Smoke Bomb per 120 cubic metres.
Activate foggers or smoke bombs according to the instructions on the packaging. If using smoke bombs it is advisable to contact the fire brigade before igniting as they may be called out if a neighbour or passer by notices smoke escaping from the property. Please be sure to place them on a non-flammable surface, for example a biscuit tin lid or an old plate. Handle with care after use as these can become quite hot. Vacate the area for a few hours to allow the gas/smoke to disperse.
Once gas/smoke has dispersed, apply Formula 'C+' spray to timbers and alighting surfaces within the roof space, paying particular attention to areas where heaviest infestation was noticed prior to smoke treatment. Formula 'C+' is also ideal for application to windows and window frames in the roof space or in affected rooms at a lower level of the property.
Formula P Powder should be applied to timbers and alighting surfaces within a roof space. Insecticidal powder can also be applied with caution around electrical items and power sockets etc. Due to the nature of the product, the residual effect of the dust tends to be longer-lasting than the spray. Caution should be exercised when applying the dust, avoiding contact with skin and eyes, especially if applying at or above head height.
After treatment, please dispose of any remaining product safely in accordance with advice on packaging.
Our Cluster Fly Treatment Kits contain a range of cluster fly killer products to enable you to get rid of cluster flies in your home or loft and prevent future cluster fly infestations. This kit is supplied with Pest Expert Formula 'P' Foggers rather than smoke bombs.
Our Cluster Fly Treatment Kits contain a range of cluster fly treatment products to enable you to get rid of cluster flies in your home or loft and prevent future cluster fly infestations. This kit is supplied with Pest Expert Formula 'P' Fumer smoke bombs.
Pest Expert Formula 'C' is a highly effective cluster fly killer spray with a fast knockdown and a long-lasting residual effect helping maintain cluster fly control. Ideal for the elimination of cluster fly infestations in lofts and other areas. Can also be applied to alighting surfaces including windows and window frames. Supplied with free safety mask and gloves. (ONLY £7.49 WHEN ORDERING MULTIPLES!).
Pest Expert Formula 'C' is a highly effective insecticidal cluster fly killer spray with a fast knockdown and a long-lasting residual effect that helps maintain cluster fly control. Ideal for the treatment of cluster fly infestations in lofts and other areas. Can also be applied to alighting surfaces including windows and window frames. Recommended for use with a Pressure Sprayer. (ONLY £24.95 WHEN ORDERING MULTIPLES).
Pest Expert Formula 'P' Cluster Fly Smoke Bombs are a highly effective cluster fly killing fumigation device. Perfect for flushing out cluster fly infestations in lofts and roofspaces. For a more comprehensive cluster fly treatment, use together with Formula 'C' Cluster Fly Killer Spray and Formula 'P' Powder or see our cluster fly control kits. (ONLY £2.66 PER SMOKE BOMB WHEN ORDERING MULTIPLE PACKS).
The Pest Expert Formula 'P' Super Fumer Cluster Fly Smoke Bomb is more powerful than a standard Smoke Bomb, treating an area 3 times the size and so making it ideal for flushing out cluster fly infestations in larger areas such as lofts and roof spaces. For longer-lasting cluster fly control, the Super Fumer should be used together with Formula 'C' Cluster Fly Killer Spray and Formula 'P' Powder.
The Pest Expert Formula 'P' Cluster Fly Fogger is a fumigation device which kills cluster flies fast. The Fogger works in the same way as a traditional smoke bomb but treats a larger area and offers a safer alternative as it requires no naked flame. (ONLY £5.65 EACH WHEN ORDERING MULTIPLES).
The new super-size Pest Expert Formula 'P+' Cluster Fly Fogger is ideal for eradicating cluster fly infestations in larger areas such as lofts and open-plan living spaces. With a coverage of more than 300 cubic meters and containing 100% natural pyrethrins, the Power Fogger offers a safe yet highly effective cluster fly treatment. From £8.29 when buying multiples!
This is a top quality safety mask that meets the EN149 European respiratory standards. Offers excellent protection when using insecticides, preventing the inhalation of liquid droplets and dust particles.
Formula ‘P’ Cluster Fly Killer is a powerful permethrin powder specifically developed to have a rapid knockdown effect on cluster fly infestations. Designed for direct application to window frames, roof timbers and any other alighting surfaces, killing cluster flies on contact and for several weeks after application.