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Flies

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Flies

Flies are considered pests because they pose a health risk to humans, pets and livestock. They can infest your home or business and spread diseases like Salmonella and E. coli. A few species may even bite humans and animals.

If a small fly problem is left uncontrolled, it has the potential to turn into a serious infestation. Some fly species are able to mature from eggs to adults in just seven to ten days. Specifically, fruit flies cause many people problems, so learn how to get rid of fruit flies here.

There are simple ways you can identify the signs of a fly infestation and reduce the need for fly control. Taking a proactive approach with deterrent measures will also help you avoid costly treatments.

Signs of a Fly Infestation

If you notice any of the following signs on your property, a fly population has likely established itself:

  • Regular Sightings: Seeing a high volume of flies buzzing around food preparation areas, waste bins, or windows.
  • Fly Spotting: Small, dark clusters of specks (flea-sized feces) on upper walls, light fittings, and ceilings.
  • Maggots: Finding fly larvae in areas with decomposing organic matter, such as compost heaps, wheelie bins, or neglected food waste.

Why Professional Fly Control is the Best Solution

While consumer fly sprays and sticky traps can kill individual insects, they fail to address the root cause of the problem. Rentokil’s professional fly control service offers long-term protection through a comprehensive strategy:

  • Source Elimination: We identify and treat the exact breeding sites such as blocked drains or hidden organic waste—to stop new flies from emerging.
  • Advanced Technology for Businesses: For commercial premises, we install energy-efficient Lumnia LED fly killers, which hygienically catch and encapsulate flies without the unsightly zapping sound or fragment spray of traditional units.
  • Targeted Residual Treatments: We apply safe, industrial-grade solutions to fly resting areas, ensuring ongoing protection.

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Fly Species & Guides

Rentokil’s Fly Control Solution

Using a professional fly control service is the most effective way to guarantee the complete removal of flies from your property.

  • Call us today to get advice on your infestation.
  • Our technicians can offer effective, targeted fly control tailored to your requirements.
  • Treatments will include the removal of any potential breeding sites to guarantee a long-term solution to keep you, your home and your business safe from harm.

1. Contact

Call us and we'll arrange for your local team to contact you

  • Local BPCA certified experts
  • Trustpilot Accredited
  • Swift response

2. Survey

We will discuss your pest problem, arrange a free business site survey & provide a quote & recommendations

  • Appointment at a time convenient to you
  • Solutions tailored to your pest problem & business
  • BPCA certified technicians & surveyors

3. Treatment

Our BPCA certified technicians will come out to provide treatments with regular follow-up visits

  • Appointment at a time convenient to you
  • Tailored treatment & effective innovative solutions
  • Business sector specific & legislation expertise

4. Aftercare

We'll make regular follow-up visits to ensure your problem is resolved & offer further support through online reporting.

  • Insect pest identification & prevention advice
  • Effective & discreet solutions
  • Peace of mind
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Flies: Frequently Asked Questions


  • How do you get rid of a fly infestation permanently?

    To get rid of flies permanently, you must eliminate their breeding grounds by securing food sources, clearing standing water, and thoroughly cleaning drains and bins. Because eggs hatch quickly, professional treatments from Rentokil are the most reliable way to break the lifecycle and prevent future swarms.


  • Why do I suddenly have a lot of flies in my house?

    A sudden influx of flies usually means an ignored food source or breeding site is nearby. This could be caused by overripe fruit left on a counter, an unsealed kitchen bin, or a dead rodent hidden inside a wall cavity or attic space.


  • What attracts flies into Irish homes?

    Flies are primarily drawn indoors by the scent of food, fermenting sugars, decaying organic matter, and garbage. During the cooler autumn months, species like cluster flies are also attracted to the warmth radiating from roofs and south-facing walls.


  • Are cluster flies dangerous to humans?

    No, cluster flies are not dangerous to human health because they do not lay eggs on human food or spread diseases like house flies do. However, they are a significant nuisance because they hibernate in massive numbers inside attics and lofts, suddenly emerging into living areas during warm spells.