{"id":32776,"date":"2026-05-19T17:28:57","date_gmt":"2026-05-19T21:28:57","guid":{"rendered":"https:\/\/www.novaextermination.com\/prevention\/attic-decontamination\/"},"modified":"2026-07-20T12:32:42","modified_gmt":"2026-07-20T16:32:42","slug":"attic-decontamination","status":"publish","type":"prevention","link":"https:\/\/www.novaextermination.com\/en\/prevention\/attic-decontamination\/","title":{"rendered":"Attic decontamination"},"content":{"rendered":"\n<!--NOVA_RATING_START--><div class=\"nova-rating-src\" hidden=\"\"><a href=\"https:\/\/search.google.com\/local\/reviews?placeid=ChIJrwH6caP-yEwR6PfHI875QhI\" target=\"_blank\" rel=\"noopener nofollow\" class=\"nova-rating-link\"><span class=\"rstars\">\u2605\u2605\u2605\u2605\u2605<\/span><span class=\"rtext\">4.9\/5 \u2022 203 Google reviews<\/span><\/a><\/div>.nova-rating-hero<span>text-align:center;margin:12px auto 4px;position:relative;z-index:3.nova-rating-hero .nova-rating-link<span>text-decoration:none;display:inline-block.nova-rating-hero .rstars<span>font-size:27px;letter-spacing:4px;line-height:1;filter:drop-shadow(0 1px 3px rgba(0,0,0,.5)).nova-rating-hero .rstars,.nova-hero-live .nova-rating-hero .rstars<span>color:#FBBC05!important.nova-rating-hero .rtext<span>display:block;color:#fff;font-weight:700;font-size:16px;margin-top:5px;text-shadow:0 1px 5px rgba(0,0,0,.6)(function(){var S=document.querySelectorAll(&#8216;.nova-rating-src&#8217;);var node=S[S.length-1];if(!node)return;function init()<span>if(node.__rdone)return;var h1=document.querySelector(&#8216;h1&#8217;);if(!h1)return;node.__rdone=1;var b=document.createElement(&#8216;div&#8217;);b.className=&#8217;nova-rating-hero&#8217;;b.innerHTML=node.innerHTML;var anchor=h1.closest(&#8216;.elementor-widget&#8217;)||h1;anchor.parentNode.insertBefore(b,anchor.nextSibling);if(document.readyState!==&#8217;loading&#8217;)init();else document.addEventListener(&#8216;DOMContentLoaded&#8217;,init);window.addEventListener(&#8216;load&#8217;,init);})();{&#8220;@context&#8221;: &#8220;https:\/\/schema.org\/&#8221;, &#8220;@type&#8221;: &#8220;Product&#8221;, &#8220;name&#8221;: &#8220;D\u00e9contamination grenier&#8221;, &#8220;description&#8221;: &#8220;Service d&#8217;extermination : D\u00e9contamination grenier. Nova Extermination, exterminateur certifie sur la Rive-Sud de Montreal et en Monteregie.&#8221;, &#8220;brand&#8221;: <span>&#8220;@type&#8221;: &#8220;Brand&#8221;, &#8220;name&#8221;: &#8220;Nova Extermination&#8221;, &#8220;aggregateRating&#8221;: <span>&#8220;@type&#8221;: &#8220;AggregateRating&#8221;, &#8220;ratingValue&#8221;: &#8220;4.9&#8221;, &#8220;reviewCount&#8221;: &#8220;203&#8221;, &#8220;bestRating&#8221;: &#8220;5&#8221;, &#8220;worstRating&#8221;: &#8220;1&#8221;<!--NOVA_RATING_END-->\n<p>When a wild animal or rodents have occupied an attic, crawl space or room, the contaminated surfaces and insulation harbor pathogens that remain virulent for several months. Cleaning with soap and water is insufficient and can even spread contaminants by aerosol. Professional decontamination eliminates the biological cause before it becomes a health problem.  <\/p>\n<p>Nova Extermination carries out certified decontamination on the South Shore, with professional equipment and biocides approved by Health Canada. License RBQ 5734 75930 01. <\/p>\n<p><strong>Areas concerned:<\/strong> the granary as a whole, regardless of the contaminating species.<\/p>\n<h2>What pathogens are present and why it matters<\/h2>\n<p>Cocktail of pathogens depending on the species present (rodents + wild animals + birds), persistent odours, degradation of insulation and framework.<\/p>\n<p>These pathogens remain dangerous long after the animals have left: hantaviruses survive for several days in aerosols, leptospires for weeks in a humid environment, roundworm eggs for months. Particularly at risk: young children, the elderly, immunocompromised, pregnant women. Professional decontamination eliminates these vectors and certifies a return to a healthy environment.  <\/p>\n<h2>Our decontamination protocol<\/h2>\n<p>preliminary diagnosis, complete removal of contaminated insulation, HEPA suction of surfaces, disinfection by broad-spectrum biocide spray, odor neutralization, replacement of insulation if required (cellulose, fiberglass or urethane according to the estimate), final inspection.<\/p>\n<h3>Equipment used<\/h3>\n<ul>\n<li>H13 class HEPA industrial vacuum cleaner (99.95 percent particle retention at 0.3 \u03bcm)<\/li>\n<li>Broad-spectrum biocides registered by Health Canada (Virkon, stabilized peroxide, rotating quaternary ammoniums)<\/li>\n<li>Full personal protective equipment (Tyvek suit, P100 half mask, nitrile gloves)<\/li>\n<li>Enzymatic odor neutralization (eliminates cause, not mask)<\/li>\n<li>Document camera for before\/after photos (belayer)<\/li>\n<\/ul>\n<p><strong>Duration:<\/strong> 1 to 3 days depending on the surface and condition.<\/p>\n<h2>Underwriting and Inspection<\/h2>\n<p>Here are the service variants we offer for this need:<\/p>\n<ul>\n<li>Spot decontamination (basement, shed, crawl space)<\/li>\n<li>Attic up to 600 sq. ft. with insulation setback<\/li>\n<li>Complete house after massive infestation<\/li>\n<li>Commercial decontamination (restaurant, warehouse)<\/li>\n<\/ul>\n<h3>What influences the quote<\/h3>\n<ul>\n<li>Surface or volume to be treated<\/li>\n<li>Extent of the infestation or situation<\/li>\n<li>Accessibility of the areas concerned<\/li>\n<li>Response time requested (planned or emergency)<\/li>\n<li>Scope of the desired warranty<\/li>\n<li>Documentation required for insurer, notary or audit<\/li>\n<\/ul>\n<p>The inspection is <strong>non-binding<\/strong>. We evaluate on site (or by phone as the case may be) and give you a written estimate adapted to your building before any work begins. No unpleasant surprises at the end.  <\/p>\n<h2>Recommended next steps<\/h2>\n<p>Decontamination corrects the consequences of an infestation. To prevent it from happening again, several related services should be considered: <\/p>\n<ul>\n<li><a href=\"https:\/\/www.novaextermination.com\/en\/decontamination\/\">decontamination<\/a><\/li>\n<li><a href=\"\/isolation-cellulose\/\">Cellulose insulation after infestation<\/a><\/li>\n<li><a href=\"\/isolation-urethane\/\">Urethane insulation and technical caulking<\/a><\/li>\n<li><a href=\"\/decontamination-raton-laveur\/\">Decontamination after raccoons<\/a><\/li>\n<li><a href=\"\/decontamination-chauve-souris\/\">Decontamination after bats<\/a><\/li>\n<\/ul>\n<h2>Home insurance coverage<\/h2>\n<p>Many home insurance policies cover decontamination when a loss is proven (animal infestation, biological damage). We make it easy to make the claim by providing: <\/p>\n<ul>\n<li>Detailed evaluation report with before\/after photos<\/li>\n<li>Precise identification of target species and pathogens<\/li>\n<li>Detailed invoice with batches of biocides used<\/li>\n<li>Signed decontamination certificate<\/li>\n<\/ul>\n<p>Practical advice: call your insurer BEFORE starting the work. Check your deductible and get a claim number. This speeds up the repayment.  <\/p>\n<h2>Questions<\/h2>\n<h3>Should the house be evacuated during decontamination?<\/h3>\n<p>For an intervention in an attic or crawl space, generally not. For decontamination in the living room, eviction of 4 to 8 hours after application of the biocide is recommended. <\/p>\n<h3>Will the smell really disappear?<\/h3>\n<p>Yes 95 percent of the time, as long as all contaminated insulation is removed. Enzyme treatment neutralizes the biological cause. If the odor persists after 7 days, we schedule a follow-up according to your warranty.  <\/p>\n<h3>Do I have to replace all the insulation every time?<\/h3>\n<p>Not systematically. It depends on the volume and depth of the contamination. Our report clearly indicates whether replacement is required.  <\/p>\n<h3>How long does it take between the call and the intervention?<\/h3>\n<p>5 business days on average. For urgent cases (unbearable smell, presence of children or animals at risk), 48 to 72 hours. <\/p>\n<h3>How long does the effect of disinfection last?<\/h3>\n<p>Indefinitely, as long as no new infestation contaminates the area. For this reason, we consistently recommend that entry points be closed after decontamination. <\/p>\n<h2>Contact Nova Extermination<\/h2>\n<p>Inspection within 24 hours, quick intervention. Intervention the next day. Coverage assessed on a case-by-case basis, depending on the condition of the building. Call <strong>514 666 6682<\/strong> or fill out the attic decontamination contact form.   <\/p>\n<p><small>Nova Extermination, RBQ license 5734 75930 01. Service 7 days a week, including public holidays. Health Canada Licensed Products.  <\/small><\/p>\n\n<!--NOVA_FAQ_START-->.nova-faq<span>max-width:900px;margin:44px auto;padding:0 16px;font-family:&#8217;Inter&#8217;,sans-serif.nova-faq__title<span>font-family:&#8217;Montserrat&#8217;,sans-serif;font-size:28px;font-weight:700;color:#BF1E2E;text-align:center;margin:0 0 26px.nova-faq__item<span>border:1px solid #ececec;border-radius:10px;margin-bottom:12px;background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.04);overflow:hidden.nova-faq__item[open]<span>box-shadow:0 6px 18px rgba(0,0,0,.09).nova-faq__q<span>font-family:&#8217;Montserrat&#8217;,sans-serif;font-weight:600;font-size:17px;color:#1a1a1a;padding:18px 52px 18px 20px;cursor:pointer;list-style:none;position:relative.nova-faq__q::-webkit-details-marker<span>display:none.nova-faq__q::after<span>content:&#8217;+&#8217;;position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:26px;line-height:1;color:#BF1E2E;font-weight:400;transition:transform .2s.nova-faq__item[open] .nova-faq__q::after<span>content:&#8217;\\2212&#8242;.nova-faq__a<span>padding:2px 20px 20px;color:#444;font-size:16px;line-height:1.65.nova-faq__a p<span>margin:0\/* remplace la FAQ generique du gabarit sur les pages de service *\/.elementor-element-a5f60a6<span>display:none!important<section class=\"nova-faq\" aria-label=\"Foire aux questions\"><h2 class=\"nova-faq__title\">Frequently Asked Questions: Attic Decontamination<\/h2><details class=\"nova-faq__item\"><summary class=\"nova-faq__q\">What does attic decontamination on the South Shore involve?<\/summary><div class=\"nova-faq__a\"><p>Attic decontamination includes the removal of soiled insulation, vacuuming feces and disinfecting surfaces after a rodent or pest infestation. This service restores a healthy environment to the attic, often the first place to be colonized in homes in Longueuil or Boucherville. It is usually accompanied by the closure of ports of entry to prevent a recurrence.  <\/p><\/div><\/details><details class=\"nova-faq__item\"><summary class=\"nova-faq__q\">How do I know if my attic needs to be decontaminated?<\/summary><div class=\"nova-faq__a\"><p>Scratching noises, an ammonia smell, traces of feces in the insulation or urine stains on the ceiling are clear signs. An attic inspection confirms the extent of contamination and the condition of the insulation. Our technicians are assessing the situation on site in Mont\u00e9r\u00e9gie.  <\/p><\/div><\/details><details class=\"nova-faq__item\"><summary class=\"nova-faq__q\">Do I need to remove and replace attic insulation?<\/summary><div class=\"nova-faq__a\"><p>Insulation contaminated with urine and feces loses its insulating value and becomes a breeding ground for odours and bacteria. We remove the soiled insulation, disinfect the structure, and then a new insulation (cellulose or urethane) can be installed according to your needs. It also improves the energy efficiency of the home.  <\/p><\/div><\/details><details class=\"nova-faq__item\"><summary class=\"nova-faq__q\">Does decontaminating the attic prevent animals from returning?<\/summary><div class=\"nova-faq__a\"><p>Sanitation alone is not enough: without closing the accesses, rodents or squirrels can return. This is why we often combine decontamination with the exclusion and sealing of points of entry in Brossard or Saint-Hubert. The whole aims for a sustainable result on a case-by-case basis.  <\/p><\/div><\/details><details class=\"nova-faq__item\"><summary class=\"nova-faq__q\">Do you offer a warranty on attic decontamination?<\/summary><div class=\"nova-faq__a\"><p>We aim for sustainable results evaluated according to each building, without promising an absolute guarantee on all our treatments. A poorly ventilated, dilapidated or unsealed attic can become recontaminated, which is the responsibility of the owner&#8217;s maintenance. Our technicians will tell you what corrective measures to take.  <\/p><\/div><\/details><details class=\"nova-faq__item\"><summary class=\"nova-faq__q\">How much does it cost to decontaminate an attic?<\/summary><div class=\"nova-faq__a\"><p>The price is based on an evaluation, based on the area of the attic, the volume of insulation to be removed and the degree of contamination. An inspection in Sainte-Julie or elsewhere on the South Shore allows for an accurate estimate. It is a paid service carried out by RBQ certified technicians.  <\/p><\/div><\/details><\/section>{&#8220;@context&#8221;: &#8220;https:\/\/schema.org&#8221;, &#8220;@type&#8221;: &#8220;FAQPage&#8221;, &#8220;mainEntity&#8221;: [{&#8220;@type&#8221;: &#8220;Question&#8221;, &#8220;name&#8221;: &#8220;En quoi consiste la d\u00e9contamination de grenier sur la Rive-Sud?&#8221;, &#8220;acceptedAnswer&#8221;: <span>&#8220;@type&#8221;: &#8220;Answer&#8221;, &#8220;text&#8221;: &#8220;La d\u00e9contamination de grenier regroupe le retrait de l&#8217;isolant souill\u00e9, l&#8217;aspiration des excr\u00e9ments et la d\u00e9sinfection des surfaces apr\u00e8s une infestation de rongeurs ou d&#8217;animaux nuisibles. Ce service redonne un environnement sain \u00e0 l&#8217;entretoit, souvent le premier endroit colonis\u00e9 dans les maisons de Longueuil ou Boucherville. Il s&#8217;accompagne g\u00e9n\u00e9ralement de la fermeture des points d&#8217;entr\u00e9e pour \u00e9viter une r\u00e9cidive.&#8221;, {&#8220;@type&#8221;: &#8220;Question&#8221;, &#8220;name&#8221;: &#8220;Comment savoir si mon grenier doit \u00eatre d\u00e9contamin\u00e9?&#8221;, &#8220;acceptedAnswer&#8221;: <span>&#8220;@type&#8221;: &#8220;Answer&#8221;, &#8220;text&#8221;: &#8220;Des bruits de grattement, une odeur d&#8217;ammoniaque, des traces d&#8217;excr\u00e9ments dans l&#8217;isolant ou des taches d&#8217;urine au plafond sont des signes clairs. Une inspection de l&#8217;entretoit confirme l&#8217;\u00e9tendue de la contamination et l&#8217;\u00e9tat de l&#8217;isolant. Nos techniciens \u00e9valuent la situation sur place en Mont\u00e9r\u00e9gie.&#8221;, {&#8220;@type&#8221;: &#8220;Question&#8221;, &#8220;name&#8221;: &#8220;Faut-il retirer et remplacer l&#8217;isolant du grenier?&#8221;, &#8220;acceptedAnswer&#8221;: <span>&#8220;@type&#8221;: &#8220;Answer&#8221;, &#8220;text&#8221;: &#8220;Un isolant contamin\u00e9 par l&#8217;urine et les excr\u00e9ments perd sa valeur isolante et devient un foyer d&#8217;odeurs et de bact\u00e9ries. Nous retirons l&#8217;isolant souill\u00e9, d\u00e9sinfectons la structure, puis un nouvel isolant (cellulose ou ur\u00e9thane) peut \u00eatre pos\u00e9 selon vos besoins. Cela am\u00e9liore aussi le rendement \u00e9nerg\u00e9tique de la maison.&#8221;, {&#8220;@type&#8221;: &#8220;Question&#8221;, &#8220;name&#8221;: &#8220;La d\u00e9contamination du grenier emp\u00eache-t-elle le retour des animaux?&#8221;, &#8220;acceptedAnswer&#8221;: <span>&#8220;@type&#8221;: &#8220;Answer&#8221;, &#8220;text&#8221;: &#8220;L&#8217;assainissement seul ne suffit pas: sans fermeture des acc\u00e8s, les rongeurs ou \u00e9cureuils peuvent revenir. C&#8217;est pourquoi nous jumelons souvent la d\u00e9contamination \u00e0 l&#8217;exclusion et au scellement des points d&#8217;entr\u00e9e \u00e0 Brossard ou Saint-Hubert. L&#8217;ensemble vise un r\u00e9sultat durable au cas par cas.&#8221;, {&#8220;@type&#8221;: &#8220;Question&#8221;, &#8220;name&#8221;: &#8220;Offrez-vous une garantie sur la d\u00e9contamination de grenier?&#8221;, &#8220;acceptedAnswer&#8221;: <span>&#8220;@type&#8221;: &#8220;Answer&#8221;, &#8220;text&#8221;: &#8220;Nous visons des r\u00e9sultats durables \u00e9valu\u00e9s selon chaque b\u00e2timent, sans promettre de garantie absolue sur tous nos traitements. Un grenier mal ventil\u00e9, v\u00e9tuste ou non scell\u00e9 peut se recontaminer, ce qui rel\u00e8ve de l&#8217;entretien du propri\u00e9taire. Nos techniciens vous indiquent les correctifs \u00e0 pr\u00e9voir.&#8221;, {&#8220;@type&#8221;: &#8220;Question&#8221;, &#8220;name&#8221;: &#8220;Combien co\u00fbte la d\u00e9contamination d&#8217;un grenier?&#8221;, &#8220;acceptedAnswer&#8221;: <span>&#8220;@type&#8221;: &#8220;Answer&#8221;, &#8220;text&#8221;: &#8220;Le prix est \u00e9tabli sur \u00e9valuation, selon la superficie de l&#8217;entretoit, le volume d&#8217;isolant \u00e0 retirer et le degr\u00e9 de contamination. Une inspection \u00e0 Sainte-Julie ou ailleurs sur la Rive-Sud permet une estimation pr\u00e9cise. C&#8217;est un service payant r\u00e9alis\u00e9 par des techniciens certifi\u00e9s RBQ.&#8221;]}<!--NOVA_FAQ_END-->\n","protected":false},"excerpt":{"rendered":"<p>Complete attic decontamination regardless of the contaminating species. Diagnosis, insulation removal, biocide disinfection, odour neutralisation. <\/p>\n","protected":false},"featured_media":30375,"template":"","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"yasr_overall_rating":0,"yasr_post_is_review":"","yasr_auto_insert_disabled":"","yasr_review_type":""},"class_list":["post-32776","prevention","type-prevention","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Complete Attic Decontamination | Nova Extermination<\/title>\n<meta name=\"description\" content=\"Complete attic decontamination after infestation. 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