{"id":846,"date":"2022-07-19T00:00:00","date_gmt":"2022-07-18T22:00:00","guid":{"rendered":"https:\/\/www.depanneo.com\/guide\/?p=846"},"modified":"2025-06-26T09:06:23","modified_gmt":"2025-06-26T07:06:23","slug":"isolation-garage-plafond","status":"publish","type":"post","link":"https:\/\/www.depanneo.com\/guide\/isolation-garage-plafond\/","title":{"rendered":"Prix et types d\u2019isolation plafond d\u2019un garage"},"content":{"rendered":"<p>L&rsquo;isolation thermique du garage est importante lorsqu&rsquo;il borde les murs de la maison. Avoir une pi\u00e8ce non chauff\u00e9e en dessous ou \u00e0 c\u00f4t\u00e9 <strong>peut causer une perte de chaleur<\/strong>, des ponts thermiques et de la condensation.<\/p>\n<p>Pour isoler le plafond du garage, il est indispensable de penser \u00e0 des mat\u00e9riaux ayant une grande r\u00e9sistance au feu. Les plus adapt\u00e9s sont la fibre de verre, la laine min\u00e9rale et les panneaux de fibres de bois min\u00e9ralis\u00e9es.<\/p>\n<p>Des panneaux en polystyr\u00e8ne autoextinguibles (EPS), avec une classe de r\u00e9sistance au feu d&rsquo;au moins le niveau R (R=9), sont fr\u00e9quemment destin\u00e9s aux rev\u00eatements int\u00e9rieurs.<\/p>\n<h2>Types d\u2019isolation du plafond d\u2019un garage<\/h2>\n<p>Il existe trois m\u00e9thodes efficaces pour isoler le plafond du garage ou des locaux :<\/p>\n<h3>Isolation thermique garage : soffite<\/h3>\n<p>Un moyen simple et rapide d&rsquo;am\u00e9liorer l&rsquo;isolation thermique du plafond du garage ; <strong>recouvrez-le de panneaux isolants EPS,<\/strong> souples et faciles \u00e0 d\u00e9couper. Il est \u00e9galement possible de le faire seul, juste un peu de comp\u00e9tences manuelles et des outils adapt\u00e9s.<\/p>\n<p>Il existe sur le march\u00e9 des panneaux d\u2019isolation pr\u00e9d\u00e9coup\u00e9s \u00e0 coller directement sur le plafond du garage. <strong>L&rsquo;installation est simple<\/strong> et les co\u00fbts sont minimes.<\/p>\n<p>L&rsquo;inconv\u00e9nient est que les parties du plafond qui ne sont pas visibles, comme les bords, continuent \u00e0 dissiper la chaleur vers l&rsquo;ext\u00e9rieur. En cas de condensation et d&rsquo;humidit\u00e9, ce syst\u00e8me peut m\u00eame aggraver la situation, car il accentue la <strong>diff\u00e9rence de temp\u00e9rature entre le plafond et les murs<\/strong> du garage.<\/p>\n<h3>Isolation thermique du garage : plafond suspendu<\/h3>\n<p>Il existe de nombreuses fa\u00e7ons d&rsquo;isoler le plafond du garage. La plus grande contrainte est l&rsquo;\u00e9paisseur, comme pour toutes les couches int\u00e9rieures.<\/p>\n<p>Si vous disposez d&rsquo;un petit garage, vous pouvez opter pour un faux plafond avec un r\u00e9flecteur de chaleur, qui est fix\u00e9 au plafond \u00e0 l&rsquo;aide d&rsquo;agrafes ou de clous et recouvert de plaques de pl\u00e2tre, sur lesquelles est plac\u00e9e une couche de finition qui le rend totalement invisible.<\/p>\n<p>L&rsquo;\u00e9paisseur du r\u00e9flecteur de chaleur est minimale (15 mm), mais un espace libre d&rsquo;environ 2 cm doit \u00eatre laiss\u00e9 pour que le r\u00e9flecteur de chaleur soit efficace.<\/p>\n<p>L&rsquo;inconv\u00e9nient de ce rev\u00eatement est qu&rsquo;il est totalement \u00e9tanche. Cela peut aggraver les <strong>probl\u00e8mes de condensation et d&rsquo;humidit\u00e9<\/strong>. C&rsquo;est pourquoi, nous pr\u00e9f\u00e9rons poser le rev\u00eatement r\u00e9fl\u00e9chissant \u00e9galement sur les murs, en cr\u00e9ant un v\u00e9ritable rev\u00eatement int\u00e9rieur, en le combinant avec des syst\u00e8mes qui isolent \u00e9galement la porte de garage.<\/p>\n<p>Beaucoup plus efficace une <strong>couche thermique interne en laine <\/strong>de verre ou fibre de bois, mat\u00e9riaux ignifuges, r\u00e9sistants \u00e0 l&rsquo;eau et respirant.<\/p>\n<blockquote class=\"custom-dpno-block bon-a-savoir\">\n<p class=\"block-title\"><i class=\"fa-solid fa-thumbs-up\"><\/i>Bon \u00e0 savoir:<\/p>\n<p>Nous vous avons regroup\u00e9 toutes les informations que vous devez savoir sur <a href=\"https:\/\/www.depanneo.com\/guide\/isolation-faux-plafond-suspendu\/\">comment isoler un faux plafond suspendu<\/a>. Cet article vous permettra d&rsquo;en apprendre davantage sur le processus d&rsquo;installation et du budget \u00e0 pr\u00e9voir pour ce chantier.<\/p><\/blockquote>\n<h3>Isolation thermique du garage : cavit\u00e9<\/h3>\n<p><strong>Pour l&rsquo;insufflation de la cavit\u00e9<\/strong>, dont nous avons parl\u00e9 \u00e0 propos de l&rsquo;isolation thermique de la maison, il est possible d&rsquo;utiliser :<\/p>\n<ul>\n<li>mousse de polyur\u00e9thane ;<\/li>\n<li>fibre de cellulose ;<\/li>\n<li>li\u00e8ge expans\u00e9 ;<\/li>\n<li>perlite expans\u00e9e ;<\/li>\n<li>laine de roche ;<\/li>\n<li>billes EPS ou NEOPOR (polystyr\u00e8ne expans\u00e9).<\/li>\n<\/ul>\n<p>Un syst\u00e8me rapide et relativement peu co\u00fbteux. Ici aussi, l&rsquo;inconv\u00e9nient est li\u00e9 aux points de liaison entre les <strong>murs d&rsquo;enceinte et les piliers porteurs<\/strong>, l\u00e0 o\u00f9 la structure n&rsquo;est pas isol\u00e9e. Pour cette raison, il doit \u00eatre associ\u00e9 \u00e0 une couche thermique externe, m\u00eame partielle.<\/p>\n<blockquote class=\"custom-dpno-block bon-a-savoir\">\n<p class=\"block-title\"><i class=\"fa-solid fa-thumbs-up\"><\/i>Bon \u00e0 savoir:<\/p>\n<p>Pour plus de conseils sur <a href=\"https:\/\/www.depanneo.com\/guide\/isoler-porte-garage-froid\/\">comment isoler la porte de votre garage du froid<\/a>, nos chauffagistes vous donnent 5 m\u00e9thodes pour pallier \u00e0 ce probl\u00e8me.<\/p><\/blockquote>\n<h2>Garage au plafond \u00e0 isolation thermique : quels sont les co\u00fbts ?<\/h2>\n<p>R\u00e9aliser une couche isolante apparente avec des panneaux coupl\u00e9s polystyr\u00e8ne\/gypse co\u00fbte environ 11 euros\/m\u00b2.<strong> Le polystyr\u00e8ne et le gypse sont inflammables<\/strong>, mais peuvent \u00eatre trait\u00e9s pour am\u00e9liorer la r\u00e9sistance au feu. La classe de r\u00e9sistance au feu doit \u00eatre v\u00e9rifi\u00e9e sur la fiche technique fournie par le fabricant.<\/p>\n<p>Alternativement, il est possible de poser un faux plafond avec des <strong>panneaux en fibres de bois min\u00e9ralis\u00e9es<\/strong> ou en laine de roche, pour un co\u00fbt de 35\/40 euros\/m\u00b2. Les laines min\u00e9rales sont respirantes et r\u00e9sistantes \u00e0 l&rsquo;eau, ce qui les rend parfaites m\u00eame pour les pi\u00e8ces sujettes \u00e0 l&rsquo;humidit\u00e9.<\/p>\n<p>La cr\u00e9ation d&rsquo;un faux plafond isolant \u00e0 l&rsquo;aide de rouleaux de mat\u00e9riau thermo-r\u00e9fl\u00e9chissant co\u00fbte environ 30 euros\/m\u00b2, y compris la pose et le <strong>rev\u00eatement en plaques de pl\u00e2tre<\/strong>. Enfin le soufflage avec de la mousse isolante polyur\u00e9thane co\u00fbte environ 17 euros\/m\u00b2.<\/p>\n<p>Nous esp\u00e9rons que cet article vous a \u00e9t\u00e9 utile ! Faites-le nous savoir !<\/p>\n<div class=\"container my-4\">\n\t\t\t\t\t<div class=\"card cta-banner mx-auto\">\n\t\t\t\t\t\t<div class=\"row g-0\">\n\t\t\t\t<div class=\"col-sm-4 col-md-4 d-none d-sm-flex\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.depanneo.com\/guide\/wp-content\/themes\/dpnoblog\/assets\/img\/appeler-depanneo.jpg\" class=\"img-fluid\" alt=\"Appeler Depanneo\">\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"col-sm-8 col-md-8 d-flex\">\n\t\t\t\t\t<div class=\"card-body\">\n\t\t\t\t\t\t<p class=\"card-text\">Depanneo vous accompagne dans votre logement<\/p>\n\t\t\t\t\t\t<a href=\"tel:0980801091\"><i class=\"fa-solid fa-phone\"><\/i>Rappel imm\u00e9diat par nos conseillers<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;isolation thermique du garage est importante lorsqu&rsquo;il borde les murs de la maison. Avoir une pi\u00e8ce non chauff\u00e9e en dessous ou \u00e0 c\u00f4t\u00e9 peut causer une perte [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":847,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"Isolation de plafond d'un garage : quel isolant choisir ?","_yoast_wpseo_metadesc":"Prix et types d\u2019isolation plafond d\u2019un garage D\u00e9couvrez notre article sur le sujet : Isolation de plafond d'un garage : quel isolant choisir ?","footnotes":""},"categories":[11],"tags":[],"class_list":["post-846","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-isolation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Isolation de plafond d&#039;un garage : quel isolant choisir ?<\/title>\n<meta name=\"description\" content=\"Prix et types 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