{"id":25095129,"date":"2026-08-14T11:34:24","date_gmt":"2026-08-14T09:34:24","guid":{"rendered":"https:\/\/frelons.be\/2026\/08\/14\/nid-de-guepes-ou-frelons-dans-la-cheminee-guide-de-retrait-et-prix\/"},"modified":"2026-08-14T11:34:24","modified_gmt":"2026-08-14T09:34:24","slug":"wasp-or-hornet-nest-in-the-chimney-removal-guide-and-prices","status":"publish","type":"post","link":"https:\/\/frelons.be\/en\/2026\/08\/14\/nid-de-guepes-ou-frelons-dans-la-cheminee-guide-de-retrait-et-prix\/","title":{"rendered":"Wasp or Hornet Nests in the Chimney: Removal Guide and Prices"},"content":{"rendered":"<h1>Can you have a wasp or hornet nest in your chimney?<\/h1>\n<h3 id=\"sommaire\">Contents<\/h3>\n<ul>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"text-primary underline toc-link\" href=\"#prix-et-devis-pour-la-destruction-d-un-nid-de-frelons-dans-une-cheminee\">Prices and Estimates for Removing a Hornet's Nest from a Chimney<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"text-primary underline toc-link\" href=\"#etapes-d-intervention-et-offres-de-service-pour-liberer-votre-conduit\">Steps Involved and Service Options for Unclogging Your Drain<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"text-primary underline toc-link\" href=\"#ou-obtenir-une-intervention-rapide-et-securisee-avec-frelons-be\">Where to Get Fast and Safe Service with Frelons.be<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"text-primary underline toc-link\" href=\"#conclusion\">Conclusion<\/a><\/p>\n<\/li>\n<\/ul>\n<p>Yes. And it\u2019s actually much more common than people realize. A chimney flue is warm, dry, dark, and sheltered from the wind and rain: for a hornet queen or a wasp colony looking for a place to settle in the spring, it\u2019s a five-star spot. Most articles on the subject talk about birds\u2014jackdaw nests in the chimney, crow nests in the chimney, and sometimes even an owl\u2019s nest. All of that happens, of course. But a bird\u2019s nest in your chimney flue will never sting you.<\/p>\n<h3 id=\"ce-qu-il-faut-retenir\">Things to remember<\/h3>\n<ul>\n<li>\n<p>Unlike traditional bird guides, we specifically address the danger posed by hymenoptera in ducts<\/p>\n<\/li>\n<li>\n<p>We highlight Frelons' expertise<\/p>\n<\/li>\n<li>\n<p>be for the safe removal of Asian hornet nests, which are active year-round, by combining fire safety and pest control<\/p>\n<\/li>\n<li>\n<p>Compare options and take action.<\/p>\n<\/li>\n<\/ul>\n<p>Hymenoptera are a different story. A constant buzzing behind the fireplace surround, insects coming and going around the chimney cap in July, wasps appearing in the living room without you knowing where they\u2019re coming from\u2014these are the signs that should set off alarm bells. And if you see large brown insects with yellow legs circling the roof, they\u2019re likely Asian hornets, which are now found throughout Belgium and are active for much longer during the year than you might think.<\/p>\n<p>The real problem is the combination of risks. A chimney blocked by a nest means restricted draft, and restricted draft in the winter means the danger of carbon monoxide in the house. Add to that a colony defending its territory just three meters from your window, and you\u2019ll understand why you shouldn\u2019t light a fire or climb onto the roof with an insecticide spray. We\u2019ll explain what to do, how much it costs, and how we handle the situation.<\/p>\n<h2 id=\"prix-et-devis-pour-la-destruction-d-un-nid-de-frelons-dans-une-cheminee\">Prices and Estimates for Removing a Hornet's Nest from a Chimney<\/h2>\n<p>The first question we\u2019re asked on the phone, nine times out of ten, is: \u00abHow much will it cost me?\u00bb The honest answer: it depends on three things\u2014height, access, and species. For a wasp nest in a chimney flue that\u2019s accessible from the ground or through a chimney cleanout hatch, the cost is generally between \u20ac90 and \u20ac150. As soon as we have to climb onto a roof or use a ladder or telescopic pole, the cost of removing a nest from a chimney tends to rise to between \u20ac150 and \u20ac250. And for a hornet\u2019s nest in the chimney of a three-story house, with a sloped roof and work at height requiring safety measures, expect to pay between \u20ac200 and \u20ac350.<\/p>\n<p><img decoding=\"async\" class=\"max-w-full h-auto rounded-md\" src=\"https:\/\/nghaeknymynesecnqcmd.supabase.co\/storage\/v1\/object\/public\/article-images\/article-1786699847615-nid-de-guepes-ou-frelons-dans-la-cheminee-guide-de-retrait-et-prix.png\" alt=\"Wasp or Hornet Nests in the Chimney: Removal Guide and Prices\"><\/p>\n<p>These are rough estimates, not set-in-stone figures. That\u2019s exactly why we give you a price before we come out, not after. A reliable pest control estimate can be done over the phone in just a few minutes: you describe the location, send a photo of the roof or vent via text, and we\u2019ll give you the price. No \u00abwe\u2019ll see when we get there,\u00bb no surprise surcharges once the truck is parked in front of your house.<\/p>\n<p>A small but important detail in Belgium: the Asian hornet is an invasive alien species. Depending on your municipality or region, part of the cost may be covered, or at the very least, you\u2019re encouraged to report sightings to official platforms. We\u2019ll be upfront with you when that\u2019s the case, because we\u2019d rather have a nest removed than left in place due to budget constraints. Every untreated Asian hornet nest could potentially produce hundreds of queen hornets the following year.<\/p>\n<p>Also be wary of prices that seem too good to be true. You\u2019ll see ads offering services for \u20ac50 all-inclusive. At that price, there\u2019s no liability insurance, no proper protective gear, and no approved pesticide. The cost of removing a hornet\u2019s nest primarily reflects the risk involved: a full-body suit, working at heights, and the use of approved professional insecticides. A homeowner who tries to tackle the job themselves with a supermarket-bought spray can three meters off the ground often ends up in the emergency room.<\/p>\n<p>One final note about the bill: don\u2019t confuse pest control with chimney sweeping. Removing a nest does not mean the chimney has been swept. After we\u2019re done, your chimney sweep will need to inspect the flue and remove any debris, especially if there was also an old bird\u2019s nest in the chimney below. Two different trades, two separate jobs, but we often work closely with local chimney sweeps.<\/p>\n<h2 id=\"etapes-d-intervention-et-offres-de-service-pour-liberer-votre-conduit\">Steps Involved and Service Options for Unclogging Your Drain<\/h2>\n<p>Are you wondering what actually happens when we arrive at your home? Nothing spectacular, but every step serves a purpose.<\/p>\n<ul>\n<li>\n<p><strong>Identification.<\/strong> Common wasp, German wasp, European hornet, Asian hornet, honeybee: these require different treatments. If there\u2019s a honeybee in a chimney, you don\u2019t handle it the same way; you first seek a solution with a beekeeper if the hive can be salvaged. An Asian giant hornet in a chimney flue, on the other hand, must always be exterminated.<\/p>\n<\/li>\n<li>\n<p><strong>Locating the nest.<\/strong> A nest in a chimney can be at the top of the flue, halfway up on a soot deposit, or behind the elbow above the firebox. By observing the workers\u2019 path for a few minutes, you can pinpoint the actual entrance. An inspection camera is sometimes used when the flue is long.<\/p>\n<\/li>\n<li>\n<p><strong>Security.<\/strong> Close the windows, move occupants and animals away, set up the ladder or aerial platform, and wear full protective gear. Never work on a wet roof without a safety harness.<\/p>\n<\/li>\n<li>\n<p><strong>Treatment.<\/strong> Application of a professional-grade insecticide (in powder or gel form) directly into the nest using a telescopic pole. Worker bees returning to the nest in the following hours spread the treatment to the rest of the colony. Full effect within a few hours.<\/p>\n<\/li>\n<li>\n<p><strong>Withdrawal and inspection.<\/strong> Whenever possible, we physically remove the nest and debris to clear the passageway. A chimney blocked by a nest remains dangerous even after the insects have died: the cardboard in the nest burns very easily, and a hornet\u2019s nest in a chimney can cause a chimney fire.<\/p>\n<\/li>\n<\/ul>\n<p>We provide this pest control service year-round. This is something I want to emphasize, because many people think that hornets \u00abdisappear\u00bb in October. Asian hornet colonies remain active until November\u2014sometimes December during mild fall seasons\u2014and the queen hornets overwinter in sheltered nooks and crannies: attics, under roofs, and abandoned ducts. By February and March, we\u2019re already treating primary nests the size of a tennis ball. Treating them at this stage is ten times easier and half the cost.<\/p>\n<p>A word about what not to do, because we often end up cleaning up the mess. Don\u2019t light a fire to smoke out a nest: the smoke makes the hornets furious before killing them, and they\u2019ll come out through the fireplace grate\u2014and into your home. Don\u2019t block the top of the vent: the insects will look for another way out, and that other way out is your living room. Don\u2019t spray water from the garden with a hose. And above all, don\u2019t climb onto the roof without protection: about ten Asian hornet stings are enough to cause a serious reaction, and just one is enough if you\u2019re allergic.<\/p>\n<p>We also offer to install anti-intrusion mesh on the chimney cap after the service. Made of fine-mesh stainless steel, it keeps out both hymenoptera and birds\u2014including that infamous jackdaw nest in the chimney that returns to the same spot every spring. It takes just thirty minutes, and you won\u2019t have to worry about it for ten years.<\/p>\n<h2 id=\"ou-obtenir-une-intervention-rapide-et-securisee-avec-frelons-be\">Where to Get Fast and Safe Service with Frelons.be<\/h2>\n<p>A nest discovered on a Friday evening isn\u2019t going to wait until Monday morning. That\u2019s why we operate with short turnaround times: most of our Asian hornet removal services are carried out within 24 to 48 hours of the call, and on the same day in cases of genuine emergency (young children, someone in the household with allergies, or a blocked chimney in the middle of winter with a wood-burning stove).<\/p>\n<p>Frelons.be serves all of Belgium with teams assigned to specific areas. When you call, you\u2019ll speak with someone who knows the area\u2014not a call center agent. You\u2019ll be asked specific questions: what the insect looks like, how many are around the roof, how high up they are, and whether the chimney is still in use. Within three minutes, we\u2019ll know if it\u2019s a wasp, a European hornet, or an Asian hornet, and we\u2019ll give you a time slot and a price.<\/p>\n<p>Our technicians are experts in nest removal, trained to work at heights and equipped with poles reaching up to 20 meters. In practice, we can treat a nest at the top of a vent without necessarily having to climb onto the roof, which reduces both risk and cost. Professional liability insurance, approved products, and traceability of the service: everything you need to ensure you\u2019re covered if anything goes wrong.<\/p>\n<p>What really sets us apart is our availability outside the peak season. Many pest control companies treat wasp infestations from June through September and then move on to other things. We focus on the Asian hornet year-round, because the battle against this species is won precisely during the periods everyone overlooks: when the queen hornets emerge from hibernation in February\u2013March, and the late nests in November that release future queens. A nest destroyed in March means several thousand fewer hornets in your neighborhood the following summer.<\/p>\n<p>The easiest way to contact us is by phone or through the form on our website, with a photo attached. A photo of the chimney cap or the insect\u2014even if it\u2019s blurry\u2014saves us a tremendous amount of time. We\u2019ll get back to you with a fixed price, and we won\u2019t change that price once we\u2019re on-site. If your municipality helps cover the cost of removing Asian hornet nests, we\u2019ll let you know and handle the paperwork.<\/p>\n<p>And if it turns out not to be a hornet but a bird\u2019s nest in the chimney flue, we\u2019ll let you know that too\u2014without charging you for an unnecessary service call. In that case, you\u2019ll need to contact a certified chimney sweep, taking care to respect the protected nesting periods. Everyone has their own area of expertise.<\/p>\n<h2 id=\"conclusion\">Conclusion<\/h2>\n<p>A nest in the chimney is never a trivial matter, but a wasp or hornet nest in the chimney poses two dangers at once: stings and a blocked flue, with the resulting risk of carbon monoxide poisoning and a chimney fire. The first step is simple: don\u2019t light a fire, don\u2019t block the flue, and don\u2019t climb onto the roof. Call us.<\/p>\n<p>Do you hear a buzzing sound in your duct or see insects swarming around your roof? Take a photo, pick up your phone, and contact Frelons.be. Get an instant quote, fast service, and a team that deals with Asian hornets year-round\u2014not just when the weather is nice.<\/p>\n<h2 id=\"questions-frequentes\">Frequently asked questions<\/h2>\n<details class=\"faq-item\">\n<summary>How can I tell if there's a wasp nest or a bird's nest in my chimney?<\/summary>\n<p>A constant buzzing behind the fireplace surround, insects coming and going around the chimney cap in the summer, or wasps appearing in the living room for no apparent reason are signs of a colony of hymenoptera. Large brown insects with yellow legs around the roof, on the other hand, are more likely to be Asian hornets. A bird\u2019s nest, meanwhile, doesn\u2019t sting, but it can also block the flue.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>How much does it cost to remove a hornet's nest from a chimney in Belgium?<\/summary>\n<p>The price depends on the height, access, and species. Expect to pay about 90 to 150 \u20ac for a nest accessible from the ground or through a chimney cleanout hatch, \u20ac150 to \u20ac250 if a ladder or telescopic pole is required, and \u20ac200 to \u20ac350 for a three-story house with a sloped roof. The price is quoted over the phone before the service is performed.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Why shouldn't you light a fire to smoke out the nest?<\/summary>\n<p>The smoke enrages the hornets before killing them, and they escape through the fireplace grate\u2014right into your home. You should also avoid blocking the top of the chimney, or the insects will look for another way out\u2014often the living room\u2014and you should not spray them with a water jet or climb onto the roof without protection.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Is treatment still effective in the fall or winter?<\/summary>\n<p>Yes. Asian hornet colonies remain active until November, sometimes into December during mild autumns, and the queen hornets overwinter in attics, under roofs, and in abandoned ducts. As early as February or March, we\u2019re already treating primary nests the size of a tennis ball: at this stage, the operation is ten times easier and half the cost.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Once the nest has been destroyed, can the chimney still be used?<\/summary>\n<p>Not automatically: pest control and chimney sweeping are two different trades. The nest is removed when possible, but your chimney sweep must then inspect the flue and remove any debris, especially if there was also an old bird\u2019s nest underneath. The cardboard in a nest burns very easily and can cause a chimney fire.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Should you be wary of data destruction offers for \u20ac50?<\/summary>\n<p>Yes, an unreasonably low price often hides the lack of liability insurance, proper protective gear, and an approved product. The price reflects the actual risk: full-body protective suit, safe work at heights, and an approved professional insecticide. Trying to do it yourself with a can of insecticide from the supermarket while standing three meters off the ground often ends up in the emergency room.<\/p>\n<\/details>","protected":false},"excerpt":{"rendered":"<p>Can a wasp or hornet nest form in your chimney? Table of Contents: Prices and Estimates for Removing a Hornet Nest from a Chimney; Steps Involved and Services Offered to Clear Your\u2026<\/p>","protected":false},"author":2,"featured_media":25095128,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-25095129","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/posts\/25095129","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/comments?post=25095129"}],"version-history":[{"count":0,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/posts\/25095129\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/media\/25095128"}],"wp:attachment":[{"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/media?parent=25095129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/categories?post=25095129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/tags?post=25095129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}