{"id":25095144,"date":"2026-08-26T09:07:26","date_gmt":"2026-08-26T07:07:26","guid":{"rendered":"https:\/\/frelons.be\/2026\/08\/26\/nid-sous-terrasse-guepes-ou-frelons-solutions-tarifs-et-experts\/"},"modified":"2026-08-26T09:07:26","modified_gmt":"2026-08-26T07:07:26","slug":"nest-under-a-deck-wasps-or-hornets-solutions-prices-and-experts","status":"publish","type":"post","link":"https:\/\/frelons.be\/en\/2026\/08\/26\/nid-sous-terrasse-guepes-ou-frelons-solutions-tarifs-et-experts\/","title":{"rendered":"Nest Under the Deck: Wasps or Hornets? Solutions, Prices, and Experts"},"content":{"rendered":"<h1>Nest Under the Deck: How to Identify It and Have It Removed?<\/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=\"#identifier-un-nid-sous-sa-terrasse-les-offres-de-traitement-adaptees\">Identifying a Nest Under Your Patio: Suitable Treatment Options<\/a><\/p>\n<\/li>\n<li>\n<p><a target=\"_blank\" rel=\"noopener noreferrer nofollow\" class=\"text-primary underline toc-link\" href=\"#prix-et-etapes-d-achat-pour-l-eradication-d-un-nid-de-guepes-ou-frelons\">Prices and Steps Involved in Removing a Wasp or Hornet Nest<\/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-pour-votre-terrasse\">Where can you get fast and reliable service for your patio?<\/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>You take your coffee out onto the wooden deck, and there you notice a flurry of activity. Insects are constantly going in and out of the same spot\u2014between two deck boards, or through a small hole in the ground right next to the pool. This isn\u2019t just a random stopover. It\u2019s a colony that has found the perfect spot in your home: dry, dark, and sheltered from rain and predators.<\/p>\n<h3 id=\"ce-qu-il-faut-retenir\">Things to remember<\/h3>\n<ul>\n<li>\n<p>We go beyond a simple practical guide to offer expertise on identifying species (wasps vs. Asian hornets) that nest under deck boards<\/p>\n<\/li>\n<li>\n<p>The focus is on the technical challenges of access and the need for safe, professional service year-round, with full transparency regarding pricing and the steps involved in Frelons\u2019 service process<\/p>\n<\/li>\n<li>\n<p>tailored treatment options<\/p>\n<\/li>\n<li>\n<p>Compare options and take action.<\/p>\n<\/li>\n<\/ul>\n<p>A <strong>nest under the deck<\/strong>, ...this is the most troublesome scenario we encounter. Not because the insects are more aggressive than elsewhere, but because the nest is invisible and inaccessible. You don\u2019t know its size, the species, or exactly where it begins. And the day someone makes the floorboards shake by walking barefoot, the colony comes out. Quickly. In droves.<\/p>\n<p>We respond to these kinds of situations year-round, even in the middle of winter, for nests of <strong>Asian hornet<\/strong> found in hedges or under structures. In this article, we\u2019ll explain how to identify what\u2019s living under your deck boards, what it really costs to get rid of it, and why using a can of insecticide from the hardware store is, in this specific case, a very bad idea.<\/p>\n<h2 id=\"identifier-un-nid-sous-sa-terrasse-les-offres-de-traitement-adaptees\">Identifying a Nest Under Your Patio: Suitable Treatment Options<\/h2>\n<p>The first thing to do: observe it from a distance for two or three minutes. There\u2019s no need to get within thirty centimeters. Identifying a wasp or hornet nest depends mainly on the activity and the way the insects look when they\u2019re flying.<\/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-1787293179229-nid-sous-terrasse-guepes-ou-frelons-solutions-tarifs-et-experts.png\" alt=\"Nest Under the Deck: Wasps or Hornets? Solutions, Prices, and Experts\"><\/p>\n<p>Visit <strong>common wasps and German wasps<\/strong> are the champions of hidden nests. They love cavities: under a wooden deck, in an embankment, under a concrete slab, in an old field mouse burrow. Small, bright yellow with black stripes, slender in build, and with a lively flight. You\u2019ll see them constantly coming and going through a single opening, sometimes no wider than a two-euro coin. This, by the way, answers a question we\u2019re often asked: in our region, nine times out of ten, the insect that builds a nest in the ground is a wasp. The nest itself is made of chewed wood pulp, gray in color, ball-shaped, and it grows throughout the season. By August, it can reach the size of a soccer ball, containing 3,000 to 5,000 individuals.<\/p>\n<p>Visit <strong>Asian hornet under a deck<\/strong>, it's rarer but it does happen, especially with the first nests of spring. Easily recognizable: entirely black thorax, dark abdomen with a single orange ring, and especially <em>yellow legs<\/em> at the tips. It is larger than a wasp (2.5 to 3 cm) but smaller than the European hornet, which is very reddish-brown and yellow. The Asian hornet typically nests high up, but 20 to 30 % of the nests are found at ground level: under a garden shed, in a compost bin, or under a wooden structure. If you see these insects hovering in front of your beehive or a window, that\u2019s a strong warning sign.<\/p>\n<p>And then there are the false positives. The <strong>mason bees and solitary bees<\/strong> These are the little clay tubes, these \u00abcocoons,\u00bb stuck to a wall or between floorboards. They\u2019re harmless, don\u2019t form colonies, and disappear on their own. You should never kill them. Neither should you kill bumblebees: they also nest in the ground, but their colony dies off naturally in the fall, and they sting only as a last resort. A reputable professional will tell you this over the phone rather than sell you an unnecessary service.<\/p>\n<p>When it comes to insect control, we tailor our approach based on what we find. For a <strong>wasp under a wooden deck<\/strong>, the preferred method is to inject an insecticide powder directly into the entrance hole using a telescoping pole. The worker wasps carry it deep into the nest, and the colony dies out within a few hours. For an Asian hornet nest, the protocol is stricter: a certified full-body suit, an injection pole, and\u2014most importantly\u2014complete destruction to prevent future queens from flying away. In both cases, access is the key factor. Sometimes one or two slats must be removed; other times, access is gained from the side of the deck. It is this assessment that determines the method, not the other way around.<\/p>\n<h2 id=\"prix-et-etapes-d-achat-pour-l-eradication-d-un-nid-de-guepes-ou-frelons\">Prices and Steps Involved in Removing a Wasp or Hornet Nest<\/h2>\n<p>Let's talk numbers, because that's often the first question. In Belgium, the <strong>Fee for removing a nest<\/strong> The cost of wasp removal ranges from 90 to 130 euros, including tax. For a <strong>wasp nest under a deck<\/strong>, expect to pay between 110 and 160 euros: the surcharge covers the time spent locating the problem, the possible removal of a blade, and the difficulty of blind injection. A <strong>hornet's nest under a deck<\/strong> or a ground-level structure falls within the same range, with an additional charge if the nest is large or if access requires working on one\u2019s knees in a confined space.<\/p>\n<p>Three factors really drive the <strong>cost of destroying a nest<\/strong> : the height or depth of access, the species involved, and the urgency. A service call on a Sunday or at 9 p.m. isn\u2019t charged at the same rate as one on a Tuesday morning. We make this clear over the phone\u2014there are never any unpleasant surprises on the bill.<\/p>\n<p>Good news about the Asian hornet: In several municipalities in Wallonia and Brussels, the cost of extermination is partially or fully covered as part of the regional effort to combat this invasive species. It\u2019s worth asking us about this when you call\u2014we\u2019re familiar with the current programs and can guide you.<\/p>\n<p>Visit <strong>steps of the procedure<\/strong>, specifically:<\/p>\n<ul>\n<li>\n<p><strong>The phone call or the form.<\/strong> Describe what you see. A photo or a short video taken from a distance is extremely helpful in identifying the species before you even have to go out there.<\/p>\n<\/li>\n<li>\n<p><strong>The Pest Control Estimate.<\/strong> Announced verbally and confirmed in writing. Fixed price\u2014no \u00abstarting at\u00bb prices that double once you get there.<\/p>\n<\/li>\n<li>\n<p><strong>The Meeting.<\/strong> Generally within 24 to 48 hours; same-day service in cases of actual danger (known allergy, children, unavoidable situation).<\/p>\n<\/li>\n<li>\n<p><strong>On-site survey.<\/strong> The technician locates the exact entry hole, checks to see if there are multiple holes, and determines whether disassembly is necessary.<\/p>\n<\/li>\n<li>\n<p><strong>Treatment.<\/strong> Injection, securing the perimeter, waiting for the foragers to return and die in turn.<\/p>\n<\/li>\n<li>\n<p><strong>Removal or plugging.<\/strong> If the nest is accessible, remove it. Otherwise, block off access to prevent it from being reoccupied and to keep pests\u2014which are attracted to the dead larvae\u2014from coming in.<\/p>\n<\/li>\n<li>\n<p><strong>Follow-up.<\/strong> If traffic persists after 48 to 72 hours, we'll follow up again. Included in the price.<\/p>\n<\/li>\n<\/ul>\n<p>What about store-bought products? An aerosol can costs 12 euros and works very well on a small, visible nest hanging from a ledge, treated at dusk. Under a patio, it\u2019s useless. The spray doesn\u2019t reach far enough; you\u2019ll kill the guards at the entrance, the colony will go on alert, and you\u2019ll end up with fifty angry wasps between you and the door. That\u2019s how most of the multiple stings we hear about happen. The same logic applies to a nest in an inaccessible roof: you need remote-injection equipment and full protective gear\u2014not just a ladder and some courage.<\/p>\n<h2 id=\"ou-obtenir-une-intervention-rapide-et-securisee-pour-votre-terrasse\">Where can you get fast and reliable service for your patio?<\/h2>\n<p>We created Frelons.be for one simple reason: too many people have to wait for days with an active nest just three meters from their dinner table. The <strong>Safety on Your Deck<\/strong> should not depend on whether a firefighter is available or on the chance of dialing a number that someone answers.<\/p>\n<p>Our teams cover Belgium and provide services <strong>all year round<\/strong>. This isn\u2019t just a marketing gimmick. In January and February, we track down Asian hornet nests that have become visible in the bare trees: every nest destroyed out of season means potentially hundreds fewer queen hornets the following spring. In March and April, we remove primary nests\u2014about the size of a golf ball\u2014often tucked under an awning, in a garden shed, or right under a deck board. This is the ideal time: just one queen, no risk, and a quick job. From June through October, it\u2019s peak wasp season, and that\u2019s when we\u2019re working at full capacity.<\/p>\n<p>Each <strong>professional pest control technician<\/strong> Everyone in our network works with full protective gear (certified puncture-resistant coveralls, gloves, and a face shield), products approved in Belgium, and liability insurance. This last point is more important than you might think: if a blade from your <strong>wooden deck<\/strong> If it gets damaged during the treatment, or if a neighbor gets stung, it\u2019s covered. But if a homeowner uses insecticide at home, it\u2019s not.<\/p>\n<p>Our <strong>emergency eradication service<\/strong> It is activated as a priority in three situations: if there is someone with allergies in the household, if a nest is located in a mandatory passageway (front door, staircase, pool access), or if young children are playing nearby. A wasp sting hurts; ten stings can land you in the hospital; and for someone with an allergy, even a single sting is enough to trigger an anaphylactic shock. This is no joke.<\/p>\n<p>How can you reach us? Give us a call or fill out the form on our website. We\u2019ll ask for your ZIP code, a description of the insect, the exact location, and, if possible, a photo. A <strong>Expert at Frelons.be<\/strong> We\u2019ll call you back, identify the species, quote a price, and schedule a visit. If we determine that the nest poses no danger (bumblebees, solitary bees, or a nest that\u2019s already dead at the end of the season), we\u2019ll let you know and won\u2019t come out. Trying to sell an unnecessary service doesn\u2019t take long to become common knowledge in a country of eleven million people.<\/p>\n<p>One last practical tip while you wait for us to arrive: cordon off the area. Place a chair across the entrance, put up a ribbon, and\u2014most importantly\u2014warn the children. No sweeping, no spraying water, no smoke. A peaceful colony remains manageable, but a disturbed colony can become dangerous for several hours.<\/p>\n<h2 id=\"conclusion\">Conclusion<\/h2>\n<p>A nest hidden under the deck boards is the scenario where improvising costs the most\u2014both in stings and in money. Take three minutes to observe, take a photo from a distance, and leave the diagnosis to someone who sees this fifty times a week. Whether it\u2019s a wasp, a European hornet, an Asian hornet, or just a mason bee\u2014the answer isn\u2019t the same, and neither is the treatment.<\/p>\n<p>Contact Frelons.be for a clear quote and prompt service, whether it\u2019s the summer season or the middle of winter. You\u2019ll be able to enjoy your patio, your pool, and your outdoor meals again. That\u2019s the whole point, after all, isn\u2019t it?<\/p>\n<h2 id=\"questions-frequentes\">Frequently asked questions<\/h2>\n<details class=\"faq-item\">\n<summary>How can I tell if it's wasps or Asian hornets nesting under my deck?<\/summary>\n<p>Observe the activity from a distance for two or three minutes. Common and German wasps are small, bright yellow with black stripes, and have a jerky flight pattern as they constantly come and go through a single opening. The Asian giant hornet, on the other hand, measures 2.5 to 3 cm, with an entirely black thorax, a dark abdomen with a single orange band, and yellow legs with yellow tips.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>How much does it cost to remove a nest under a deck in Belgium?<\/summary>\n<p>For an accessible wasp nest, expect to pay 90 to 130 euros, including tax. Under a deck, the price tends to rise to 110\u2013160 euros: the additional charge covers locating the nest, removing a deck board if necessary, and blind injection. A ground-level hornet\u2019s nest falls within the same price range, with a surcharge depending on its size and how restricted access is.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Why not use an insecticide spray from the hardware store?<\/summary>\n<p>A 12-euro aerosol works on a small nest visible under a ledge, but not under slats. The spray doesn\u2019t penetrate far enough: you kill the guards at the entrance, the colony goes on high alert, and you end up with fifty angry wasps between you and the door. This is the cause of most reported cases of multiple stings.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Is there any municipal assistance available for the removal of an Asian hornet nest?<\/summary>\n<p>Yes, several municipalities in Wallonia and Brussels provide for partial or full coverage of the costs of eradication as part of the regional effort to combat this invasive species. Ask about this when you call: the current programs are well-known, and you will be directed based on your ZIP code.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>Do we really need to kill all the insects that nest between the slats?<\/summary>\n<p>No. Mason bees and solitary bees build small tubes of dirt attached to walls or between slats: they are harmless, do not form colonies, and disappear on their own. Bumblebees also nest in the ground, but their colonies die off naturally in the fall. These situations never warrant intervention.<\/p>\n<\/details>\n<details class=\"faq-item\">\n<summary>How long does it take for Frelons.be to respond, and what should I do in the meantime?<\/summary>\n<p>Appointments are usually scheduled within 24 to 48 hours, and on the same day in cases of immediate danger: known allergies, young children, or a nest in a mandatory passageway. In the meantime, cordon off the area with a chair or tape and warn the children. Above all, do not sweep, spray with water, or use smoke: a disturbed colony remains dangerous for several hours.<\/p>\n<\/details>","protected":false},"excerpt":{"rendered":"<p>A Nest Under Your Deck: How to Identify It and Have It Removed?Table of ContentsIdentifying a Nest Under Your Deck: Suitable Treatment OptionsCosts and Steps Involved in Having a Wasp Nest Removed\u2026<\/p>","protected":false},"author":2,"featured_media":25095143,"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-25095144","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\/25095144","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=25095144"}],"version-history":[{"count":0,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/posts\/25095144\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/media\/25095143"}],"wp:attachment":[{"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/media?parent=25095144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/categories?post=25095144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frelons.be\/en\/wp-json\/wp\/v2\/tags?post=25095144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}