{"id":76302,"date":"2010-09-16T00:00:00","date_gmt":"2010-09-15T22:00:00","guid":{"rendered":"http:\/\/b.bati-journal.com\/le-chanvre-en-doublage-isolant-interieur\/76302"},"modified":"2019-07-15T11:19:38","modified_gmt":"2019-07-15T09:19:38","slug":"le-chanvre-en-doublage-isolant-interieur","status":"publish","type":"post","link":"https:\/\/batijournal.com\/index.php\/le-chanvre-en-doublage-isolant-interieur\/76302\/","title":{"rendered":"Le chanvre en doublage isolant int\u00e9rieur"},"content":{"rendered":"<p>Le b\u00e9ton de chanvre est \u00e0 pr\u00e9sent bien connu des sp\u00e9cialistes de la restauration, notamment en remplissage de murs \u00e0 ossature bois, o\u00f9 il fait merveille. Mais voici que BCB a mis au point une nouvelle application de ce mat\u00e9riau, qui permet d\u0092obtenir des performances d\u0092isolation int\u00e9ressantes tout en autorisant une mise en \u009cuvre m\u00e9canis\u00e9e par machine \u00e0 projeter.<\/p>\n<p><span style=\u201cfont-weight: bold;\u201c>Application directement sur le mur<\/span><br \/>Ce doublage isolant int\u00e9rieur est un m\u00e9lange de chaux a\u00e9rienne (\u00adTradical PF 70) et de granulats de chanvre (\u00adChanvribat). Il s\u0092applique directement sur tout type de support min\u00e9ral, comme les murs en pierre ou en brique. On le projette directement sur la surface, sans joint ni lame d\u0092air. Il assure ainsi une parfaite continuit\u00e9 avec l\u0092existant : on sait que des ponts thermiques peuvent appara\u00eetre avec certaines isolations, ce qui n\u0092est pas le cas ici. On note un coefficient de conductivit\u00e9 thermique int\u00e9ressant (0,107W\/m.k) et le R (m2.K\/W) est de 0,9 \u00e0 1,9 selon les \u00e9paisseurs de mati\u00e8re appliqu\u00e9e, qui peuvent varier de 5cm \u00e0 20cm en rapport avec la nature du mur et les performances recherch\u00e9es. (R = 0,9 pour 10cm, R = 0,26 pour 15cm et R = 1,9 pour 20cm). Retenons \u00e9galement que la masse volumique du produit est de 440kg\/&amp;#8202;m2 (pour un b\u00e9ton dos\u00e9 \u00e0 330kg\/m\u00b2).<\/p>\n<p><span style=\u201cfont-weight: bold;\u201c>Aplanissement des surfaces<\/span><br \/>Le doublage isolant chanvre, dont la nature m\u00eame permet un respect absolu des modes constructifs, offre un aplanissement parfait des surfaces : projet\u00e9 sur un mur irr\u00e9gulier et\/ou h\u00e9t\u00e9rog\u00e8ne, avec gobetis, on le dresse simplement \u00e0 la r\u00e8gle. Les \u00e9carts de plan\u00e9it\u00e9 sont \u00e9limin\u00e9s. Dans le cas de sp\u00e9cificit\u00e9s architecturales pr\u00e9sentes dans les pi\u00e8ces \u00e0 r\u00e9nover, comme des ouvertures ou des d\u00e9crochements, il suffit d\u0092installer un coffrage de r\u00e9servation. En outre, ce type de doublage pr\u00e9serve les \u00e9changes hydriques dans le mur : ce ph\u00e9nom\u00e8ne de perm\u00e9ance des mat\u00e9riaux est, on le sait, un param\u00e8tre essentiel \u00e0 prendre en compte dans le cadre de chantiers de r\u00e9novation de b\u00e2ti ancien.<\/p>\n<p><span style=\u201cfont-weight: bold;\u201c>Mise en \u009cuvre modulable<\/span><br \/>Le produit pr\u00e9sente une bonne stabilit\u00e9 dimensionnelle, sans tassement ni retrait : cet avantage avait d\u00e9j\u00e0 \u00e9t\u00e9 remarqu\u00e9 lors d\u0092une utilisation en ext\u00e9rieur, notamment en remplissage. Bien entendu, ni les insectes ni les champignons ne s\u0092y attaqueront. Quant aux petits rongeurs, ils passeront leur chemin ! La mise en \u009cuvre du doublage isolant chanvre peut \u00eatre effectu\u00e9 selon diff\u00e9rentes techniques : \u00e0 la main, selon la m\u00e9thode jet\u00e9 truelle ou entre mur et banche. Ou \u00e0 l\u0092aide d\u0092une machine \u00e0 projeter, surtout pour les salles de grandes dimensions. Laiss\u00e9 tel quel, le produit est gris\/beige clair : il peut \u00e9videmment \u00eatre trait\u00e9 selon diverses finitions \u00e0 la chaux, que l\u0092on souhaite conserver au mur une certaine rugosit\u00e9 esth\u00e9tique, ou qu\u0092on le rende au contraire totalement lisse. Dans la gamme BCB, on trouve pour ce faire l\u0092enduit chanvre \u00adTradical, l\u0092enduit chaux \u00adTradical et sable, et l\u0092enduit \u00adTradical D\u00e9cor. Mais dans ce domaine, le choix sur le march\u00e9 est vaste, et tout d\u00e9pend des go\u00fbts de chacun.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le b\u00e9ton de chanvre est \u00e0 pr\u00e9sent bien connu des sp\u00e9cialistes de la restauration, notamment en remplissage de murs \u00e0 ossature bois, o\u00f9 il fait merveille. Mais voici que BCB a mis au point une nouvelle application de ce mat\u00e9riau, qui permet d\u0092obtenir des performances d\u0092isolation int\u00e9ressantes tout en autorisant une mise en \u009cuvre m\u00e9canis\u00e9e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[6340],"tags":[],"class_list":["post-76302","post","type-post","status-publish","format-standard","hentry","category-architecture-conception"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le chanvre en doublage isolant int\u00e9rieur<\/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:\/\/batijournal.com\/index.php\/le-chanvre-en-doublage-isolant-interieur\/76302\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le chanvre en doublage isolant int\u00e9rieur\" \/>\n<meta property=\"og:description\" content=\"Le b\u00e9ton de chanvre est \u00e0 pr\u00e9sent bien connu des sp\u00e9cialistes de la restauration, notamment en remplissage de murs \u00e0 ossature bois, o\u00f9 il fait merveille. 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