{"id":152,"date":"2025-05-23T07:48:45","date_gmt":"2025-05-23T06:48:45","guid":{"rendered":"https:\/\/polyisofactory.com\/?p=152"},"modified":"2025-05-23T07:49:57","modified_gmt":"2025-05-23T06:49:57","slug":"polyiso-vs-xps-foam-board-quel-isolant-choisir","status":"publish","type":"post","link":"https:\/\/polyisofactory.com\/fr\/knowledge\/polyiso-vs-xps-foam-board-which-insulation-should-you-choose\/","title":{"rendered":"Polyiso vs XPS Foam Board : Quel isolant choisir ?"},"content":{"rendered":"

Les entrepreneurs et les constructeurs sont souvent confront\u00e9s \u00e0 un dilemme lorsqu'il s'agit de choisir entre polyisocyanurate<\/a> (Polyiso) et les panneaux de mousse de polystyr\u00e8ne extrud\u00e9 (XPS). Bien qu'il s'agisse dans les deux cas de mat\u00e9riaux d'isolation rigides, les diff\u00e9rences essentielles en termes de performances et de co\u00fbts auront une incidence sur les r\u00e9sultats de votre projet.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

D\u00e9monstration de la valeur R : Performance thermique<\/h2>\n\n\n\n

Le Polyiso est en t\u00eate avec une valeur R de 5,6 \u00e0 8,0 par pouce (v\u00e9rifi\u00e9e par les essais en laboratoire de la NAIMA), surpassant le XPS (R-4,5 \u00e0 R-5,0) d'environ 20% \u00e0 \u00e9paisseur identique. Les donn\u00e9es de terrain montrent que le Polyiso conserve cet avantage \u00e0 des temp\u00e9ratures sup\u00e9rieures \u00e0 50\u00b0F, bien que sa valeur R diminue l\u00e9g\u00e8rement dans les climats plus froids.<\/p>\n\n\n\n

R\u00e9sistance \u00e0 l'humidit\u00e9 : Laboratoire et monde r\u00e9el<\/h2>\n\n\n\n

XPS absorbe moins de 0,3% d'eau par volume (norme ASTM C272), ce qui le rend id\u00e9al pour les applications sous le niveau du sol, comme les sous-sols. Le taux d'absorption de 0,5%-2% du Polyiso s'am\u00e9liore consid\u00e9rablement avec les nouveaux mod\u00e8les dot\u00e9s d'une feuille d'aluminium appliqu\u00e9e en usine - les entrepreneurs de Denver font \u00e9tat d'une r\u00e9sistance \u00e0 l'humidit\u00e9 sup\u00e9rieure de 40% dans les assemblages de toits ventil\u00e9s.<\/p>\n\n\n\n

Manutention sur le chantier : Le point de vue des entrepreneurs<\/h2>\n\n\n\n

Le XPS se coupe facilement \u00e0 l'aide de couteaux utilitaires, ce qui permet de gagner du temps sur les formes complexes. Le Polyiso n\u00e9cessite des outils sp\u00e9cialis\u00e9s mais offre une r\u00e9sistance \u00e0 la compression sup\u00e9rieure (25-30 psi contre 15-25 psi pour le XPS). Les couvreurs de Milwaukee confirment la durabilit\u00e9 du Polyiso sous des \u00e9quipements lourds lors de l'installation de toitures commerciales.<\/p>\n\n\n\n

Analyse des co\u00fbts : Au-del\u00e0 des prix au pied carr\u00e9<\/h2>\n\n\n\n

\u00c0 0,60-0,60-0,85\/pi\u00b2, l'XPS semble moins cher que le Polyiso (0,70-0,70-1,10). Un projet d'entrep\u00f4t au Texas a r\u00e9v\u00e9l\u00e9 des co\u00fbts totaux de 18% plus \u00e9lev\u00e9s avec XPS apr\u00e8s avoir pris en compte les fixations et la main d'\u0153uvre suppl\u00e9mentaires.<\/p>\n\n\n\n

Conformit\u00e9 en mati\u00e8re de s\u00e9curit\u00e9 incendie<\/h2>\n\n\n\n

Les deux r\u00e9pondent aux normes ASTM E84 Classe 1, mais le Polyiso produit 30% de fum\u00e9e en moins lors de la combustion. Les r\u00e9centes mises \u00e0 jour des codes des tours de Chicago imposent sp\u00e9cifiquement le Polyiso pour l'isolation des gaines d'ascenseurs en raison de son profil de toxicit\u00e9 des fum\u00e9es sup\u00e9rieur.<\/p>\n\n\n\n

Mise \u00e0 jour de l'impact environnemental<\/h2>\n\n\n\n

La fabrication du XPS utilise des agents gonflants HFC dont le potentiel de r\u00e9chauffement global (PRG) est de 1430. Polyiso est pass\u00e9 aux agents gonflants \u00e0 base d'eau (GWP<1) en 2021, ce qui lui permet d'obtenir des cr\u00e9dits LEED v4.1. Le code municipal de Vancouver exige d\u00e9sormais l'utilisation de Polyiso \u00e9cologique dans les projets d'infrastructure publique.<\/p>\n\n\n\n

Quand choisir chacun d'entre eux :<\/h2>\n\n\n\n
    \n
  • Polyiso<\/strong>: Toitures commerciales, environnements \u00e0 haute temp\u00e9rature, projets LEED<\/li>\n\n\n\n
  • XPS<\/strong>: Structures temporaires, isolation sous le niveau du sol, applications de bricolage<\/li>\n\n\n\n
  • Approche hybride<\/strong>: Combiner le Polyiso avec des pare-vapeur dans les climats froids (courant dans les provinces des Prairies canadiennes).<\/li>\n<\/ul>\n\n\n\n

    Aper\u00e7u de l'industrie en 2025<\/strong>: Les tests certifi\u00e9s NFRC montrent que Polyiso conserve sa valeur R 27% mieux que XPS apr\u00e8s 10 ans d'exposition aux UV - un facteur critique pour le retour sur investissement \u00e0 long terme.<\/p>","protected":false},"excerpt":{"rendered":"

    Contractors and builders often face a dilemma when selecting between polyisocyanurate (Polyiso) and extruded polystyrene (XPS) foam boards. While both […]<\/p>\n","protected":false},"author":1,"featured_media":153,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge"],"uagb_featured_image_src":{"full":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board.webp",600,400,false],"thumbnail":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board-150x150.webp",150,150,true],"medium":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board-300x200.webp",300,200,true],"medium_large":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board.webp",600,400,false],"large":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board.webp",600,400,false],"1536x1536":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board.webp",600,400,false],"2048x2048":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board.webp",600,400,false],"trp-custom-language-flag":["https:\/\/polyisofactory.com\/wp-content\/uploads\/2025\/05\/Polyiso-vs-XPS-Foam-Board-18x12.webp",18,12,true]},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/polyisofactory.com\/fr\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Contractors and builders often face a dilemma when selecting between polyisocyanurate (Polyiso) and extruded polystyrene (XPS) foam boards. While both […]","_links":{"self":[{"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/posts\/152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/comments?post=152"}],"version-history":[{"count":0,"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/posts\/152\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/media\/153"}],"wp:attachment":[{"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/media?parent=152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/categories?post=152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/polyisofactory.com\/fr\/wp-json\/wp\/v2\/tags?post=152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}