{"id":3576,"date":"2026-10-18T18:41:21","date_gmt":"2026-10-18T18:41:21","guid":{"rendered":"https:\/\/www.rattech.com\/hvad-kan-rotter-gnave-igennem\/"},"modified":"2026-10-18T18:41:22","modified_gmt":"2026-10-18T18:41:22","slug":"hvad-kan-rotter-gnave-igennem","status":"publish","type":"post","link":"https:\/\/www.rattech.com\/pl\/hvad-kan-rotter-gnave-igennem\/","title":{"rendered":"Hvad kan rotter gnave igennem? Fra plast til beton"},"content":{"rendered":"<style id=\"rt-blog-enrich\">:root{ --rt-navy:#1D3557;--rt-navy-d:#143852;--rt-navy-ink:#0f2740; --rt-ink:#1e293b;--rt-muted:#5b6b80; --rt-orange:#F28023;--rt-orange-d:#d76d13;--rt-peach:#FFBC7D; --rt-bg:#F4F6FA;--rt-bg2:#eaeef6;--rt-paper:#FBFCFE;--rt-line:#DDE4EE;--rt-line-d:#C7D1E0; --rt-font:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; --rt-body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; --rt-sh-sm:0 2px 10px rgba(15,39,64,.06); --rt-sh:0 12px 30px rgba(15,39,64,.10); --rt-sh-lg:0 26px 60px rgba(15,39,64,.16); --rt-dots:radial-gradient(rgba(29,53,87,.055) 1.1px,transparent 1.1px); } .elementor-widget-theme-post-title{position:relative;} .elementor-widget-theme-post-title::before{ content:\"\";display:block;width:58px;height:5px;border-radius:3px; background:linear-gradient(90deg,var(--rt-orange),var(--rt-peach));margin:0 0 .8rem;} .elementor-widget-theme-post-title .elementor-heading-title{ font-family:var(--rt-font)!important;font-weight:800;color:var(--rt-navy-ink); 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margin:0 0 1em;overflow:hidden;box-shadow:var(--rt-sh-sm);} .rt-main tbody td{display:flex;justify-content:space-between;gap:1.1em;align-items:baseline; text-align:right;padding:.65em .95em;border-top:1px solid var(--rt-bg2);} .rt-main tbody td::before{content:attr(data-label);font-family:var(--rt-font);font-weight:700; color:var(--rt-navy);text-align:left;flex:0 0 42%;font-size:.86rem;} .rt-main tbody td:first-child{display:block;text-align:left; background:linear-gradient(180deg,var(--rt-navy),var(--rt-navy-d));color:#fff;font-family:var(--rt-font); font-weight:700;border-top:none;padding:.75em .95em;} .rt-main tbody td:first-child::before{content:none;} }\n<\/style>\n<div class=\"rt-article\">\n<div class=\"rt-main\">\n<p>Rotter kan gnave sig igennem alt, der er bl\u00f8dere end emaljen p\u00e5 deres fort\u00e6nder. If\u00f8lge <a href=\"https:\/\/mst.dk\/erhverv\/rent-miljoe-og-sikker-forsyning\/rottebekaempelse\/kend-forskel-paa-mus-og-rotter\">Milj\u00f8styrelsens side om rotter og mus<\/a> g\u00e6lder det blandt andet tr\u00e6, plast, mursten, kalksten, aluminium, zink og bly, og rotterne gnaver s\u00e6rligt gerne i elkabler. Rustfrit st\u00e5l kommer de ikke igennem (Bolius, 2025). Hel, velst\u00f8bt beton holder som regel, men revner, por\u00f8se st\u00f8bninger og plastr\u00f8r, der er st\u00f8bt ind i betonen, er svage punkter.<\/p>\n<p><strong>Kort fortalt<\/strong><\/p>\n<ul>\n<li>If\u00f8lge Milj\u00f8styrelsen vokser en brun rottes fort\u00e6nder cirka 2,7 mm om ugen, eller omkring 14 cm om \u00e5ret. Derfor skal rotten gnave hele livet.<\/li>\n<li>Plastafl\u00f8b er det svage punkt i mange huse. Bolius skriver i 2025, at rotter kan komme igennem plastafl\u00f8b, som er den mest almindelige type.<\/li>\n<li>Rustfrit st\u00e5l holder. En rottesp\u00e6rre er typisk lavet af rustfrit st\u00e5l, som rotter ikke kan gnave sig igennem (Bolius, 2025).<\/li>\n<li>If\u00f8lge Bolius (2022) kan en rotte klemme sig gennem et hul p\u00e5 bare 2 cm i diameter. Derfor skal du tage selv sm\u00e5 gnavehuller alvorligt.<\/li>\n<\/ul>\n<h2>Hvilke materialer kan rotter gnave igennem?<\/h2>\n<p>Rotter kan gnave igennem alle materialer, der er bl\u00f8dere end deres egen tandemalje. Det er Milj\u00f8styrelsens tommelfingerregel, og den g\u00e6lder ikke kun bl\u00f8de materialer som tr\u00e6 og plast. Milj\u00f8styrelsen n\u00e6vner ogs\u00e5 kalksten, mursten, aluminium, zink og bly. Rotten gnaver for at komme ind og ud, men ogs\u00e5 for at unders\u00f8ge ting, og if\u00f8lge Milj\u00f8styrelsen gnaver den s\u00e6rligt gerne i elkabler.<\/p>\n<p>Tabellen viser materialer, du typisk finder i og omkring et dansk hus, ordnet efter hvor godt de holder til rottens t\u00e6nder. Til hver vurdering st\u00e5r kilden, og hvad du konkret kan g\u00f8re.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<thead>\n<tr>\n<th>Materiale<\/th>\n<th>Kan rotten gnave igennem?<\/th>\n<th>Hvor du typisk finder det<\/th>\n<th>Hvad du kan g\u00f8re<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tr\u00e6<\/td>\n<td>Ja (Milj\u00f8styrelsen)<\/td>\n<td>D\u00f8re, fodlister, skure, tr\u00e6gulve<\/td>\n<td>Luk hullet med en metalplade, ikke med et nyt stykke tr\u00e6<\/td>\n<\/tr>\n<tr>\n<td>Plast- og PVC-r\u00f8r<\/td>\n<td>Ja, ogs\u00e5 almindelige plastafl\u00f8b (Bolius, 2025)<\/td>\n<td>Kloak-, afl\u00f8bs- og dr\u00e6nr\u00f8r, nedl\u00f8bsr\u00f8r<\/td>\n<td>Find bruddet med en kloakinspektion. Bolius n\u00e6vner r\u00f8r af rustfrit st\u00e5l eller beton som alternativer<\/td>\n<\/tr>\n<tr>\n<td>Isolering, PU-skum, fugemasse<\/td>\n<td>Ja, de er langt bl\u00f8dere end tandemalje<\/td>\n<td>Hulmur, r\u00f8rgennemf\u00f8ringer, loft<\/td>\n<td>Luk aldrig et rottehul med skum alene<\/td>\n<\/tr>\n<tr>\n<td>Elkabler<\/td>\n<td>Ja, og rotter gnaver s\u00e6rligt gerne i dem (Milj\u00f8styrelsen)<\/td>\n<td>K\u00e6lder, loft, krybek\u00e6lder, motorrum<\/td>\n<td>Tjek kabler for gnavespor, hvis du har mistanke om rotter<\/td>\n<\/tr>\n<tr>\n<td>Mursten, kalksten, m\u00f8rtelfuger<\/td>\n<td>Ja (Milj\u00f8styrelsen)<\/td>\n<td>Sokkel, k\u00e6lderv\u00e6gge, gamle fuger<\/td>\n<td>Hold fuger og sokkel hele, og reparer skader hurtigt<\/td>\n<\/tr>\n<tr>\n<td>Aluminium, zink, bly<\/td>\n<td>Ja (Milj\u00f8styrelsen)<\/td>\n<td>Indd\u00e6kninger, tagrender, \u00e6ldre r\u00f8r<\/td>\n<td>Regn ikke med tynde, bl\u00f8de metaller som barriere<\/td>\n<\/tr>\n<tr>\n<td>Tyndt metalgitter og fuglegitter<\/td>\n<td>Ja, if\u00f8lge en ekspert hos Bolius (2020) bliver et fuglegitter af metal gnavet v\u00e6k<\/td>\n<td>Ventilationsriste, fuglegitre ved tag og loft<\/td>\n<td>Fjern rottens klatreveje til taget, og brug kraftige metalriste og metalnet ved afl\u00f8b og udluftning (Bolius, 2022)<\/td>\n<\/tr>\n<tr>\n<td>Hel, velst\u00f8bt beton<\/td>\n<td>Som regel nej, men rotten kan gnave revner og por\u00f8se kanter st\u00f8rre<\/td>\n<td>K\u00e6ldergulve, fundamenter, betonr\u00f8r<\/td>\n<td>Reparer revner, og t\u00e6t r\u00f8rgennemf\u00f8ringer<\/td>\n<\/tr>\n<tr>\n<td>Rustfrit st\u00e5l<\/td>\n<td>Nej (Bolius, 2025)<\/td>\n<td>Rottesp\u00e6rrer, r\u00f8r, riste<\/td>\n<td>Brug det de mest udsatte steder, fx i kloakken<\/td>\n<\/tr>\n<\/tbody>\n<\/table><figcaption class=\"wp-element-caption\">Kan rotter gnave igennem almindelige byggematerialer? RatTechs oversigt baseret p\u00e5 Milj\u00f8styrelsen og Bolius<\/figcaption><\/figure>\n<h2>Kan rotter gnave igennem beton?<\/h2>\n<p>Rotter kommer som regel ikke igennem hel beton af god kvalitet, men de kan gnave sig igennem revner, por\u00f8se kanter og de plastr\u00f8r, der g\u00e5r gennem betonen. Bolius n\u00e6vner i sin guide om at slippe for rotter i huset (opdateret august 2025) betonr\u00f8r og r\u00f8r af rustfrit st\u00e5l som mere holdbare alternativer til plastafl\u00f8b. Selv om betonen holder, kan rotten alts\u00e5 finde en vej udenom.<\/p>\n<p>De svage punkter er der, hvor betonen ikke er hel, og hvor andre materialer m\u00f8der den:<\/p>\n<ul>\n<li><strong>Revner og afskalninger:<\/strong> En kant giver t\u00e6nderne fat. Rotten kan gnave en revne bredere, indtil den kan klemme sig igennem.<\/li>\n<li><strong>Por\u00f8s eller d\u00e5rligt blandet beton:<\/strong> Gammel eller d\u00e5rligt st\u00f8bt beton smuldrer lettere end en t\u00e6t, velst\u00f8bt flade.<\/li>\n<li><strong>R\u00f8rgennemf\u00f8ringer:<\/strong> Et plastr\u00f8r bliver ikke rottesikkert af at v\u00e6re st\u00f8bt ind i et betongulv. Rotten gnaver i r\u00f8ret, ikke i betonen.<\/li>\n<li><strong>Under st\u00f8bningen:<\/strong> Rotter graver. De kan komme ind under et betond\u00e6k nedefra, hvis fundamentet ikke er t\u00e6t.<\/li>\n<\/ul>\n<p>Et rottehul i et betongulv skyldes derfor ofte en svaghed, der var der i forvejen, fx en defekt kloak under gulvet. L\u00e6s mere om, hvad du g\u00f8r ved <a href=\"\/rotter-i-kaelderen\/\">rotter i k\u00e6lderen<\/a>.<\/p>\n<h2>Hvordan er en rottes t\u00e6nder bygget?<\/h2>\n<p>En rotte har fire fort\u00e6nder, to i overk\u00e6ben og to i underk\u00e6ben, og de vokser hele livet. If\u00f8lge Milj\u00f8styrelsen vokser den brune rottes fort\u00e6nder cirka 2,7 mm om ugen, eller omkring 14 cm om \u00e5ret. Det svarer til godt 1 cm om m\u00e5neden. Derfor er rotten n\u00f8dt til at gnave hele tiden for at holde t\u00e6nderne i en brugbar l\u00e6ngde.<\/p>\n<p>T\u00e6nderne fungerer som mejsler, der sliber sig selv. Den h\u00e5rde emalje sidder p\u00e5 forsiden, mens bagsiden best\u00e5r af bl\u00f8dere tandben. N\u00e5r over- og undert\u00e6nderne slides mod hinanden og mod det, rotten gnaver i, slides bagsiden hurtigst. S\u00e5 forbliver kanten skarp og skr\u00e5. Forsiden af fort\u00e6nderne er typisk gul-orange, fordi emaljen indeholder jern.<\/p>\n<p>Bag fort\u00e6nderne har rotten et mellemrum uden t\u00e6nder, hvor den kan tr\u00e6kke kinderne ind. S\u00e5 kan den gnave sig gennem fx tr\u00e6 eller plast uden at sluge sp\u00e5nerne. Den gnaver for at komme igennem, ikke n\u00f8dvendigvis for at spise. Er du i tvivl om, hvilket dyr der har gnavet, kan du l\u00e6se om <a href=\"\/forskel-paa-rotter-og-mus\/\">forskellen p\u00e5 rotter og mus<\/a>. Gnavespor fra rotter er markant st\u00f8rre.<\/p>\n<h2>Hvor gnaver rotter sig typisk ind i et hus?<\/h2>\n<p>Rotter gnaver sig oftest ind nedefra via kloakken, hvor et brud p\u00e5 et plastr\u00f8r giver dem et sted at starte. <a href=\"https:\/\/www.bolius.dk\/saadan-slipper-du-for-rotter-i-huset-11804\">Bolius&#8217; guide til at slippe for rotter i huset<\/a> (2025) skriver, at der altid er rotter i kloakken, og at plastafl\u00f8b er noget, rotterne kan komme igennem. If\u00f8lge <a href=\"https:\/\/www.bolius.dk\/rotter-i-boligen-18058\">Bolius&#8217; artikel om rotter i boligen<\/a> (2022) kan en rotte klemme sig gennem et hul p\u00e5 bare 2 cm i diameter. L\u00e6s mere om, <a href=\"\/hvor-lille-et-hul-kan-en-rotte-komme-igennem\/\">hvor lille et hul en rotte kan komme igennem<\/a>.<\/p>\n<p>Her afg\u00f8r rottens t\u00e6nder typisk, om den kommer ind:<\/p>\n<ul>\n<li>Brud og samlinger p\u00e5 kloakr\u00f8r af plast under gulve og i haven<\/li>\n<li>R\u00f8rgennemf\u00f8ringer i sokkel og k\u00e6lderv\u00e6g, der er t\u00e6tnet med fugemasse eller skum<\/li>\n<li>Ventilationsriste af plast eller tyndt net, ofte ind til <a href=\"\/rotter-i-hulmur\/\">hulmuren<\/a><\/li>\n<li>Ut\u00e6tte tr\u00e6d\u00f8re og porte til skur, garage og k\u00e6lder<\/li>\n<\/ul>\n<p>Skaderne stopper ikke ved indgangen. <a href=\"https:\/\/mst.dk\/media\/w3ffvxsq\/brun-rotte.pdf\">Milj\u00f8styrelsens faktaark om brun rotte<\/a> (2022, udarbejdet af DCE, Aarhus Universitet) beskriver, at rotter g\u00f8r skade ved at gnave gennem elkabler og ved at \u00f8del\u00e6gge kloakker og bygninger. If\u00f8lge faktaarket bruger kommunerne omkring 300 mio. kr. om \u00e5ret p\u00e5 at forebygge og bek\u00e6mpe rotter. Samme trang til at gnave forklarer ogs\u00e5 <a href=\"\/rotter-i-motorrum\/\">rotteskader i bilens motorrum<\/a>. Vil du vide mere om selve indgangene, s\u00e5 l\u00e6s <a href=\"\/hvordan-kommer-rotter-ind-i-huset\/\">hvordan rotter kommer ind i huset<\/a>.<\/p>\n<h2>Hvilke materialer holder rotterne ude?<\/h2>\n<p>Rustfrit st\u00e5l, kraftige metalriste og t\u00e6t, hel beton beskytter bedst mod gnav. <a href=\"https:\/\/www.bolius.dk\/saadan-fungerer-en-rottespaerre-92066\">Bolius&#8217; gennemgang af rottesp\u00e6rrer<\/a> skriver, at en rottesp\u00e6rre typisk er lavet af rustfrit st\u00e5l, som rotter ikke kan gnave sig igennem. Bolius angiver en pris p\u00e5 4.500-5.000 kr. inkl. moms for at f\u00e5 en installeret af en autoriseret kloakmester (2025-priser), og sp\u00e6rren skal som minimum efterses en gang om \u00e5ret.<\/p>\n<p>Ved mindre \u00e5bninger g\u00e6lder samme princip: Brug metal, der er h\u00e5rdere end rottens t\u00e6nder, og hold \u00e5bningerne under 2 cm. Bolius (2022) anbefaler metalnet over udluftnings\u00e5bninger og metalriste i gulvafl\u00f8b. En ekspert hos Bolius advarer dog om, at et tyndt fuglegitter af metal bliver gnavet v\u00e6k (2020). Det er alts\u00e5 tykkelsen og materialet, der g\u00f8r forskellen. Du kan sammenligne l\u00f8sninger i vores guide til <a href=\"\/bedste-rottespaerre\/\">den bedste rottesp\u00e6rre<\/a>.<\/p>\n<h2>Hvorfor er gift en d\u00e5rlig l\u00f8sning mod rotter, der gnaver?<\/h2>\n<p>Gift er en d\u00e5rlig l\u00f8sning, fordi en rotte, der kan gnave sig ind i en hulmur, et loft eller under et gulv, ogs\u00e5 ofte d\u00f8r d\u00e9r. Rottegift virker typisk ikke med det samme, s\u00e5 rotten n\u00e5r at tr\u00e6kke sig tilbage til sine gange i huset. If\u00f8lge Milj\u00f8styrelsens faktaark om brun rotte (2022) vejer en voksen rotte normalt 200-250 g. En d\u00f8d rotte p\u00e5 den st\u00f8rrelse inde i en v\u00e6g kan lugte i lang tid. L\u00e6s mere om, <a href=\"\/hvor-laenge-lugter-en-doed-rotte\/\">hvor l\u00e6nge en d\u00f8d rotte lugter<\/a>.<\/p>\n<p>Gift har ogs\u00e5 andre ulemper. Rovfugle, katte og hunde kan blive forgiftet, hvis de \u00e6der en forgiftet rotte, og rotter kan blive modstandsdygtige over for nogle typer gift. Giften l\u00f8ser heller ikke selve problemet: Hullet i kloakr\u00f8ret eller den gnavede rist er der stadig.<\/p>\n<p>Ved <a href=\"\/\">giftfri rottebek\u00e6mpelse<\/a> med digitale f\u00e6lder sl\u00e5r f\u00e6lden rotten ihjel mekanisk, og du f\u00e5r besked, n\u00e5r den har fanget noget. Den d\u00f8de rotte ligger alts\u00e5 i f\u00e6lden og ikke inde i en v\u00e6g. Med et <a href=\"\/product\/abonnement\/\">abonnement p\u00e5 overv\u00e5gede f\u00e6lder<\/a> holdes der \u00f8je med f\u00e6lderne via en router, og RatTech t\u00f8mmer og servicerer dem, mens du lukker hullet, hvor rotterne kommer ind.<\/p>\n<h2>Hvad g\u00f8r du, n\u00e5r du finder gnavespor?<\/h2>\n<p>N\u00e5r du finder gnavespor fra rotter, skal du anmelde dem til kommunen, finde indgangen og lukke den med et materiale, rotten ikke kan gnave i. Kommunen har ansvaret for rottebek\u00e6mpelse, og du anmelder typisk via kommunens selvbetjening eller <a href=\"https:\/\/www.borger.dk\">borger.dk<\/a>. If\u00f8lge Milj\u00f8styrelsens faktaark (2022) har antallet af rotteanmeldelser til kommunerne ligget omkring 150.000-160.000 om \u00e5ret, s\u00e5 du er langt fra alene.<\/p>\n<ol>\n<li>Anmeld rotterne til kommunen. Se, <a href=\"\/anmeld-rotter-til-kommunen\/\">hvordan du anmelder rotter<\/a>.<\/li>\n<li>Find ud af, hvor de kommer ind: F\u00f8lg gnavespor, ekskrementer og fedtede striber langs v\u00e6gge og r\u00f8r. Er du i tvivl, kan du sammenligne med <a href=\"\/rotte-spor\/\">typiske rottespor<\/a>.<\/li>\n<li>F\u00e5 kloakken unders\u00f8gt, hvis sporene peger mod gulvafl\u00f8b, k\u00e6lder eller sokkel.<\/li>\n<li>Luk hullerne med noget, rotten ikke kan gnave i, dvs. metal eller beton, ikke skum eller tr\u00e6.<\/li>\n<li>Fjern de rotter, der allerede er inde, uden gift, s\u00e5 du undg\u00e5r d\u00f8de dyr inde i huset.<\/li>\n<\/ol>\n<p>Er du usikker p\u00e5, hvor rotterne kommer ind, kan en <a href=\"\/product\/gennemgang-af-ejendom\/\">gennemgang af ejendommen<\/a> finde de svage punkter, fx plastr\u00f8r, riste og r\u00f8rgennemf\u00f8ringer, f\u00f8r f\u00e6lderne s\u00e6ttes op.<\/p>\n<div class=\"rt-cta\">\n<h3>Slip af med rotterne \u2014 helt uden gift<\/h3>\n<p>RatTechs digitale f\u00e6lder afliver rotterne mekanisk og overv\u00e5ger d\u00f8gnet rundt. Vi st\u00e5r for montering, service og t\u00f8mning, s\u00e5 du aldrig skal h\u00e5ndtere hverken gift eller kadaver.<\/p>\n<p>  <a class=\"rt-cta-btn\" href=\"\/product\/grundpakke\/\">Se grundpakken<\/a>\n<\/div>\n<h2>Ofte stillede sp\u00f8rgsm\u00e5l<\/h2>\n<div class=\"rt-faq\">\n<details>\n<summary>Kan rotter gnave igennem metal?<\/summary>\n<div class=\"rt-faq-a\">Det afh\u00e6nger af metallet og tykkelsen. If\u00f8lge Milj\u00f8styrelsen kan rotter gnave i bl\u00f8de metaller som aluminium, zink og bly, og en ekspert hos Bolius (2020) skriver, at et tyndt fuglegitter af metal bliver gnavet v\u00e6k. Rustfrit st\u00e5l kan de ikke gnave igennem, og derfor laves rottesp\u00e6rrer typisk af rustfrit st\u00e5l (Bolius, 2025).<\/div>\n<\/details>\n<details>\n<summary>Kan rotter gnave igennem PU-skum og fugemasse?<\/summary>\n<div class=\"rt-faq-a\">Ja. PU-skum og fugemasse er langt bl\u00f8dere end rottens tandemalje, og Milj\u00f8styrelsen skriver, at rotter kan gnave i alt, der er bl\u00f8dere end emaljen. Skum kan derfor ikke st\u00e5 alene som lukning af et rottehul. Brug metalplade, kraftigt metalnet eller beton, og brug kun skum og fugemasse til at g\u00f8re lukningen t\u00e6t.<\/div>\n<\/details>\n<details>\n<summary>Hvor hurtigt vokser en rottes t\u00e6nder?<\/summary>\n<div class=\"rt-faq-a\">If\u00f8lge Milj\u00f8styrelsen vokser en brun rottes fort\u00e6nder cirka 2,7 mm om ugen, eller omkring 14 cm om \u00e5ret. Det er godt 1 cm om m\u00e5neden. Fort\u00e6nderne vokser hele livet, s\u00e5 rotten skal gnave konstant for at slide dem ned og holde dem i en brugbar l\u00e6ngde.<\/div>\n<\/details>\n<details>\n<summary>Kan en rotte gnave sig igennem en rottesp\u00e6rre?<\/summary>\n<div class=\"rt-faq-a\">Nej. En rottesp\u00e6rre er typisk lavet af rustfrit st\u00e5l, som rotter ikke kan gnave sig igennem (Bolius, 2025). Den hj\u00e6lper dog ikke, hvis der allerede er rotter i r\u00f8rene p\u00e5 husets side af sp\u00e6rren, eller hvis der er et r\u00f8rbrud, de kan komme ud af. If\u00f8lge Bolius skal en rottesp\u00e6rre som minimum efterses en gang om \u00e5ret.<\/div>\n<\/details>\n<details>\n<summary>Hvorfor gnaver rotter i elledninger?<\/summary>\n<div class=\"rt-faq-a\">Milj\u00f8styrelsen skriver, at rotter gnaver for at komme ind og ud og for at unders\u00f8ge ting, og at de har stor fork\u00e6rlighed for at gnave i elkabler. Gnavede ledninger kan give kortslutning, s\u00e5 finder du skader, b\u00f8r en elektriker tjekke installationen, og du b\u00f8r anmelde rotterne til kommunen.<\/div>\n<\/details>\n<\/div>\n<h2>Kilder<\/h2>\n<ul>\n<li>Milj\u00f8styrelsen: Kend forskel p\u00e5 mus og rotter (bes\u00f8gt 2026) &#8211; mst.dk<\/li>\n<li>Milj\u00f8styrelsen (2022): Faktaark for invasive arter &#8211; Brun rotte (Rattus norvegicus), udarbejdet af DCE, Aarhus Universitet &#8211; mst.dk<\/li>\n<li>Bolius (2025): S\u00e5dan slipper du for rotter i huset &#8211; bolius.dk<\/li>\n<li>Bolius (2025-priser): S\u00e5dan fungerer en rottesp\u00e6rre &#8211; bolius.dk<\/li>\n<li>Bolius (2022): Rotter i boligen &#8211; bolius.dk<\/li>\n<li>Bolius (2020): Rotterne har f\u00e5et adgang til loftet ved at bide sig gennem fuglegitteret &#8211; bolius.dk<\/li>\n<li>Borger.dk: Anmeld rotter til kommunen (bes\u00f8gt 2026) &#8211; borger.dk<\/li>\n<\/ul>\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\/\/www.rattech.com\/hvad-kan-rotter-gnave-igennem\/#article\",\"headline\":\"Hvad kan rotter gnave igennem? 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Se hvilke materialer der holder, og hvordan du sikrer huset.\",\"inLanguage\":\"da-DK\",\"datePublished\":\"2026-10-18\",\"dateModified\":\"2026-10-18\",\"mainEntityOfPage\":\"https:\/\/www.rattech.com\/hvad-kan-rotter-gnave-igennem\/\",\"author\":{\"@type\":\"Organization\",\"name\":\"RatTech\",\"url\":\"https:\/\/www.rattech.com\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"RatTech\",\"url\":\"https:\/\/www.rattech.com\"},\"about\":[\"rotter\",\"rotte t\u00e6nder\",\"rottesikring\",\"giftfri rottebek\u00e6mpelse\"]},{\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Forside\",\"item\":\"https:\/\/www.rattech.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Blog\",\"item\":\"https:\/\/www.rattech.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Hvad kan rotter gnave igennem?\",\"item\":\"https:\/\/www.rattech.com\/hvad-kan-rotter-gnave-igennem\/\"}]}]}<\/script><br \/>\n<script type=\"application\/ld+json\">{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Kan rotter gnave igennem metal?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Det afh\u00e6nger af metallet og tykkelsen. If\u00f8lge Milj\u00f8styrelsen kan rotter gnave i bl\u00f8de metaller som aluminium, zink og bly, og en ekspert hos Bolius (2020) skriver, at et tyndt fuglegitter af metal bliver gnavet v\u00e6k. Rustfrit st\u00e5l kan de ikke gnave igennem, og derfor laves rottesp\u00e6rrer typisk af rustfrit st\u00e5l (Bolius, 2025).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Kan rotter gnave igennem PU-skum og fugemasse?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Ja. PU-skum og fugemasse er langt bl\u00f8dere end rottens tandemalje, og Milj\u00f8styrelsen skriver, at rotter kan gnave i alt, der er bl\u00f8dere end emaljen. Skum kan derfor ikke st\u00e5 alene som lukning af et rottehul. 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Den hj\u00e6lper dog ikke, hvis der allerede er rotter i r\u00f8rene p\u00e5 husets side af sp\u00e6rren, eller hvis der er et r\u00f8rbrud, de kan komme ud af. If\u00f8lge Bolius skal en rottesp\u00e6rre som minimum efterses en gang om \u00e5ret.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Hvorfor gnaver rotter i elledninger?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Milj\u00f8styrelsen skriver, at rotter gnaver for at komme ind og ud og for at unders\u00f8ge ting, og at de har stor fork\u00e6rlighed for at gnave i elkabler. Gnavede ledninger kan give kortslutning, s\u00e5 finder du skader, b\u00f8r en elektriker tjekke installationen, og du b\u00f8r anmelde rotterne til kommunen.\"\n      }\n    }\n  ]\n}<\/script>\n<\/div>\n<aside class=\"rt-contact\">\n  <span class=\"rt-contact-badge\">Giftfri rottebek\u00e6mpelse<\/span><\/p>\n<h3>Har du rotter?<\/h3>\n<p>F\u00e5 en uforpligtende snak om digital, giftfri bek\u00e6mpelse \u2014 vi d\u00e6kker Sj\u00e6lland og Stork\u00f8benhavn.<\/p>\n<p class=\"rt-contact-phone\"><a href=\"tel:+4570200091\">70 20 00 91<\/a><\/p>\n<p class=\"rt-contact-mail\"><a href=\"mailto:info@rattech.com\">info@rattech.com<\/a><\/p>\n<p>  <a class=\"rt-contact-btn\" href=\"\/product\/gennemgang-af-ejendom\/\"><svg width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><rect x=\"3\" y=\"4\" width=\"18\" height=\"18\" rx=\"2\"\/><path d=\"M16 2v4M8 2v4M3 10h18M9 16l2 2 4-4\"\/><\/svg>Book en ejendomsgennemgang<\/a><br \/>\n<\/aside>\n<\/div>\n<p><script id=\"rt-table-labels\">\n(function(){function go(){document.querySelectorAll('.rt-main table').forEach(function(t){\nvar hs=[].map.call(t.querySelectorAll('thead th'),function(th){return th.textContent.trim();});\nt.querySelectorAll('tbody tr').forEach(function(tr){[].forEach.call(tr.children,function(td,i){if(hs[i])td.setAttribute('data-label',hs[i]);});});});}\nif(document.readyState!=='loading')go();else document.addEventListener('DOMContentLoaded',go);})();\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rotter gnaver gennem alt, der er bl\u00f8dere end deres tandemalje &#8211; tr\u00e6, plast, mursten og kabler. Se hvilke materialer der holder, og hvordan du sikrer huset.<\/p>","protected":false},"author":7,"featured_media":1171,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3576","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>RatTech<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rattech.com\/pl\/hvad-kan-rotter-gnave-igennem\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rattech.com\/pl\/hvad-kan-rotter-gnave-igennem\/\" \/>\n<meta property=\"og:site_name\" content=\"RatTech\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-18T18:41:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-18T18:41:22+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rattech.com\/wp-content\/uploads\/2025\/12\/rottesikring-af-skur-1024x683.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"683\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"space\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"space\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 minut\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.rattech.com\\\/hvad-kan-rotter-gnave-igennem\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.rattech.com\\\/hvad-kan-rotter-gnave-igennem\\\/\"},\"author\":{\"name\":\"space\",\"@id\":\"https:\\\/\\\/www.rattech.com\\\/en\\\/#\\\/schema\\\/person\\\/bc212bbb4bd24f92a7afa66f5c1f4661\"},\"headline\":\"Hvad kan rotter gnave igennem? 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