How to Deal with a Fly Infestation in the House

There’s nothing more frustrating than a swarm of flies invading your home, especially during the warmer months. Whether it’s a few buzzing around the kitchen or a more serious infestation in the loft, flies are unhygienic, annoying, and can be surprisingly difficult to get rid of.

Here’s how to identify the source, stop the breeding cycle, and keep flies out of your home.

What Causes a Fly Infestation?

Common causes include:

• Rubbish build-up (indoors or outside)

• Uncovered food or compost

• Pet waste or litter trays

• Blocked drains or sink residue

• Animal carcasses (often in roof spaces or wall cavities)

If you’ve noticed an increase in flies, the key is to track down the breeding site, not just treat the symptom.

Types of Flies in UK Homes

• House flies: Common, fast-breeding, attracted to food and waste.

• Cluster flies: Often found in lofts and attics during spring/autumn.

• Fruit flies: Attracted to ripened or rotting fruit and sugary residues.

• Drain flies: Thrive in stagnant water or gunk inside pipes.

Knowing the type helps determine the source.

Steps to Take Immediately

1. Clear all food waste - Cover bins, clean surfaces, store food in sealed containers.

2. Check drains - Clean U-bends, overflow holes, and use drain cleaner if needed.

3. Ventilate - Open windows and use extractor fans to reduce humidity.

4. Install fly screens - Especially in kitchens and conservatories.

5. Use fly traps or sprays - But don’t rely on these alone.

   
   
   
   

When to Call a Professional

If:

• Flies return after cleaning

• You find large numbers in lofts or hidden areas

• You suspect a dead animal or unseen breeding site

... it’s time to call GEM Services. We’ll identify the source, treat the infestation, and give you practical steps to prevent recurrence.