Sewer flies

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Sewerflies are less well known to us. We do not come into contact with them very much. These insects are only a few millimetres big and remarkably hairy on their wings. Their colour often varies from dark to light grey. As their name suggests, they live mainly in our sewers. Sewerflies like a humid and cold environment. Their larvae are mainly found in sewage treatment beds. Sewerflies are also found in the water pipes of our homes. This is certainly the case if they are defective or if they are not cleaned regularly. In that case, there is often sludge in the pipes which causes them to become clogged up. Sewage flies can also be found near damp plant containers and in so-called pupa plants.


Haired wings larger than body

Sewerflies are easily recognisable by their rough hairy wings. They are even bigger than their body. Sewerflies, also called moth mosquitoes, are only five millimetres big. Their colour varies from dark to light grey and even yellow. They also have hairy feelers on their heads. Larvae of sewerflies have no legs and eyes. They only survive in a humid environment. The larvae of these flies are up to nine millimetres long. These flies are not exactly the best kites. They can even be blown away by the wind. During the day, they often remain motionless, with their wings like roof tiles on top of each other. From a distance they can be compared to a small, dusty and dark grey triangle. In the evening and especially at night they are most active. Because these sewerflies are so small we often only recognise them when it is too late. They don’t just stay on walls, but just as well in all kinds of cracks and crevices.

Rollies in the house

Sewerflies therefore prefer to live in our sewers. Sometimes they also occur in our homes. Do you have sewerflies in your home? Then it is best to discover them in the evening. Rotting organic material plants, leaves and fruit are their favourite food. During the day, they rest in the shade on walls and walls. You can also find them in the immediate vicinity of the plumbing and sanitary pipes. Septic tanks, drains, rain pipes, waste water under flower boxes, in showers, washbasins, in stagnant water from damaged pipes and crawler basements are their favourite places to stay. Don’t get caught if you find sewer flies in your home. Make sure you get rid of them for good before they lay eggs, because then there is no stopping them. On average, a female sewer fly lays no less than 200 eggs a day. The flies appear after just two days and do not grow older than three weeks. The female sewer fly can then lay about 2800 eggs. In just a few weeks they can take care of several generations of sewerflies.

Causing sewerflies

Sewer flies are often the result of a defect in the sewer system, pipes or ducts. Fractures in the water pipe often cause dirty and polluted water. And it is precisely there that sewerflies immediately feel at home. Dirty water and sand leave behind a dirty layer of silt. This silt layer forms the ideal breeding ground for the newly born larvae. They grow there at lightning speed to become sewerflies. Because sewerflies are so small, it is difficult to track them. They hide easily on walls and walls but just as well in cracks and holes. Especially in the evening and at night they look for food. Fungi and disease-transmitting bacteria are their favourite food.

Rollies and our health

According to many insiders, sewerflies are harmless, but that is clearly not the case if you have to deal with a real sewer fly plague. Sewerflies in the house are not only annoying, they even endanger your health. The pathogenic bacteria that spread them are responsible for this. Fighting rowing flies is therefore pure necessity. They do not bite or sting. What they do do is leave all kinds of bacteria from polluted places such as sewers in the house. Sewerflies are bad kites that easily bring bacteria and fungi with them. A few sewerflies in the house clearly pose little or no danger to our health. A sewer fly plague clearly is. They find all kinds of waste in our sewers. With their small hairy tentacles they leave these pathogenic bacteria everywhere in your home. Not only on walls, but just as well on the floor, in cracks and holes, on all your plates, glasses and cutlery, on kitchen appliances and even on food products such as fruit and vegetables.

Preventing violet flies

It is best to leave the fight against sewer flies to professional and experienced staff. The only thing you can try yourself is to keep these annoying and not harmless sewerflies out of your home. There is a real risk of contamination by fungi and bacteria. If a few flies are left over after control, your house will be full of flies again in no time. This is not the case when you put professional pest control professionals to work. They come into daily contact with pests such as sewage flies. You don’t fight them in a few hours or a day. To make sure that the last sewer flies are eliminated, this requires a professional approach. Preventing sewerflies in your home is not so obvious. You can try it on:

    • All gutters to be cleaned regularly and both leaves and mud to be removed
    • Remedying any leaks or other defects in drain pipes
    • Containers with organic waste to be hermetically sealed
    • Prevent standing water in flower boxes, crawl spaces or crawl cellars
    • Gently cover the ventilation pipes of septic tanks
    • All drain pipes to be cleaned regularly with hot water
    • Regular washbasins that are little used by rinsing with water. The siphon must never be left dry

Inject professional exterminators in case of a sewer fly infestation

Are you dealing with a real plague of sewerflies indoors? Don’t let it ruin your life and call in professional pest controllers. They will quickly help you get rid of all the sewerflies. Don’t hesitate to contact us immediately. Together we will discuss the various possibilities to get rid of your sewer fly infestation as quickly as possible.

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