{"id":2634,"date":"2026-10-27T08:00:00","date_gmt":"2026-10-27T08:00:00","guid":{"rendered":"https:\/\/biomattone.it\/?p=2634"},"modified":"2026-10-20T13:34:14","modified_gmt":"2026-10-20T13:34:14","slug":"comment-choisir-le-format-du-biomattone-guide-du-ba8-au-ba50","status":"publish","type":"post","link":"https:\/\/biomattone.it\/fr\/comment-choisir-le-format-du-biomattone-guide-du-ba8-au-ba50\/","title":{"rendered":"Comment choisir le format du Biomattone\u00ae\u00a0: guide du BA8 au BA50"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Pour choisir le format du Biomattone, on part de la fonction du mur. On \u00e9value ensuite l\u2019espace disponible et les performances requises. Les formats vont du BA8 au BA50, avec des \u00e9paisseurs de 8 \u00e0 50 cm.<\/p><h2 class=\"wp-block-heading\">En bref<\/h2><ul class=\"wp-block-list\"><li>Fonction\u00a0: mur de remplissage, contre-cloison, cloison ou sous-couche.<\/li><li>Espace\u00a0: l\u2019\u00e9paisseur va de 8 \u00e0 50 cm.<\/li><li>Isolation\u00a0: U de 0,5 \u00e0 0,09 W\/m\u00b2K.<\/li><li>D\u00e9phasage\u00a0: de 3h00&prime; \u00e0 32h04&prime;, sans enduit.<\/li><li>Acoustique\u00a0: Rw de 40 \u00e0 45 dB du BA30 au BA50.<\/li><li>Feu\u00a0: r\u00e9action B-s1,d0\u00a0; r\u00e9sistance EI 180 du BA30 au BA50.<\/li><\/ul><p class=\"wp-block-paragraph\"><em>Mis \u00e0 jour le 5 octobre 2026. Source des donn\u00e9es\u00a0: fiche technique Biomattone\u00ae NOV25.<\/em><\/p><h2 class=\"wp-block-heading\">Dans cet article<\/h2><ul class=\"wp-block-list\"><li><a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"#criteri\">Les crit\u00e8res pour choisir le format du Biomattone<\/a><\/li><li><a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"#tabella\">Comparaison des formats<\/a><\/li><li><a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"#passi\">Comment choisir le format en cinq \u00e9tapes<\/a><\/li><li><a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"#esempio\">Un exemple\u00a0: du BA30 au BA50<\/a><\/li><li><a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"#territorio\">Choisir le format du Biomattone \u00e0 Brescia et \u00e0 Bolzano<\/a><\/li><li><a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"#faq\">Questions fr\u00e9quentes sur le format<\/a><\/li><\/ul><h2 class=\"wp-block-heading\" id=\"criteri\">Les crit\u00e8res pour choisir le format du Biomattone<\/h2><p class=\"wp-block-paragraph\">Le choix repose sur quatre crit\u00e8res, \u00e0 \u00e9valuer dans cet ordre.<\/p><ul class=\"wp-block-list\"><li>la fonction du mur\u00a0;<\/li><li>l\u2019espace disponible pour l\u2019\u00e9paisseur\u00a0;<\/li><li>les performances thermiques et acoustiques\u00a0;<\/li><li>la r\u00e9sistance au feu et les autres exigences.<\/li><\/ul><h2 class=\"wp-block-heading\" id=\"tabella\">Comparaison des formats<\/h2><p class=\"wp-block-paragraph\">Le tiret indique une donn\u00e9e que la fiche ne mentionne pas.<\/p><figure class=\"wp-block-table\"><table><thead><tr><th>Format<\/th><th>\u00c9paisseur (cm)<\/th><th>U (W\/m\u00b2K)<\/th><th>Rt (m\u00b2K\/W)<\/th><th>D\u00e9phasage (sans enduit)<\/th><th>Rw (dB)<\/th><th>R\u00e9sistance au feu<\/th><\/tr><\/thead><tbody><tr><td>BA8<\/td><td>8<\/td><td>0,5<\/td><td>1,99<\/td><td>3h00&prime;<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr><tr><td>BA12<\/td><td>12<\/td><td>0,34<\/td><td>2,9<\/td><td>5h44&prime;<\/td><td>\u2014<\/td><td>EI 60<\/td><\/tr><tr><td>BA20<\/td><td>20<\/td><td>0,21<\/td><td>4,71<\/td><td>11h19&prime;<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr><tr><td>BA25<\/td><td>25<\/td><td>0,17<\/td><td>5,85<\/td><td>14h46&prime;<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr><tr><td>BA30<\/td><td>30<\/td><td>0,14<\/td><td>6,99<\/td><td>18h14&prime;<\/td><td>40<\/td><td>EI 180<\/td><\/tr><tr><td>BA36<\/td><td>36<\/td><td>0,12<\/td><td>8,35<\/td><td>22h23&prime;<\/td><td>42<\/td><td>EI 180<\/td><\/tr><tr><td>BA40<\/td><td>40<\/td><td>0,11<\/td><td>9,01<\/td><td>25h08&prime;<\/td><td>43<\/td><td>EI 180<\/td><\/tr><tr><td>BA50<\/td><td>50<\/td><td>0,09<\/td><td>11,53<\/td><td>32h04&prime;<\/td><td>45<\/td><td>EI 180<\/td><\/tr><\/tbody><\/table><\/figure><p class=\"wp-block-paragraph\">Comme vous le voyez, les donn\u00e9es ne sont pas compl\u00e8tes pour tous les formats\u00a0: par exemple, la fiche n\u2019indique pas de Rw en dessous du BA30.<\/p><h2 class=\"wp-block-heading\" id=\"passi\">Comment choisir le format en cinq \u00e9tapes<\/h2><p class=\"wp-block-paragraph\">Pour choisir le format du Biomattone, vous pouvez suivre cinq \u00e9tapes\u00a0: chacune r\u00e9duit les options possibles.<\/p><ul class=\"wp-block-list\"><li>D\u00e9finissez la fonction du mur.<\/li><li>Mesurez l\u2019espace disponible pour l\u2019\u00e9paisseur.<\/li><li>Fixez les objectifs d\u2019isolation et de d\u00e9phasage.<\/li><li>V\u00e9rifiez l\u2019acoustique et le feu, si n\u00e9cessaire.<\/li><li>Faites \u00e9valuer la composition de paroi par le technicien.<\/li><\/ul><p class=\"wp-block-paragraph\">Pour finir, le concepteur v\u00e9rifie les d\u00e9tails constructifs, l\u2019enduit et les finitions. Le choix d\u00e9finitif doit toujours \u00eatre valid\u00e9 sur le projet.<\/p><h2 class=\"wp-block-heading\" id=\"esempio\">Un exemple\u00a0: du BA30 au BA50<\/h2><p class=\"wp-block-paragraph\">Prenons un projet en climat rigoureux. Avec le BA30, U est de 0,14 W\/m\u00b2K et le d\u00e9phasage de 18h14&prime;. Avec le BA50, U descend \u00e0 0,09 W\/m\u00b2K et le d\u00e9phasage monte \u00e0 32h04&prime;, mais il faut 20 cm d\u2019espace suppl\u00e9mentaire.<\/p><p class=\"wp-block-paragraph\">Au final, c\u2019est un compromis entre espace et performances.<\/p><h2 class=\"wp-block-heading\" id=\"territorio\">Choisir le format du Biomattone \u00e0 Brescia et \u00e0 Bolzano<\/h2><p class=\"wp-block-paragraph\">\u00c0 Brescia, vous trouverez les <a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"https:\/\/biomattone.it\/fr\/biomattone-a-brescia-formats-prix-et-donnees-techniques\/\">formats, prix et donn\u00e9es techniques<\/a>. \u00c0 Bolzano, en revanche, sont pr\u00e9sent\u00e9es les <a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"https:\/\/biomattone.it\/fr\/biomattone-a-bolzano-performances-thermiques-en-climat-rigoureux\/\">performances pour les climats rigoureux<\/a>.<\/p><p class=\"wp-block-paragraph\">Pour aller plus loin, consultez le guide <a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"https:\/\/biomattone.it\/fr\/quest-ce-que-le-biomattone-composition-formats-et-fonctionnement\/\">qu\u2019est-ce que le Biomattone<\/a> et les articles sur la <a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"https:\/\/biomattone.it\/fr\/transmission-thermique-du-biomattone-comment-interpreter-u-et-rt-pour-chaque-format\/\">transmission thermique du Biomattone<\/a> et sur le <a style=\"color:#9e5931;text-decoration:underline;font-weight:600;\" href=\"https:\/\/biomattone.it\/fr\/dephasage-thermique-du-biomattone-valeurs-par-format\/\">d\u00e9phasage thermique du Biomattone<\/a>.<\/p><h2 class=\"wp-block-heading\" id=\"faq\">Questions fr\u00e9quentes sur le format<\/h2>\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1791548916794\"><strong class=\"schema-faq-question\">Combien de formats de Biomattone existe-t-il\u00a0?<\/strong> <p class=\"schema-faq-answer\">Huit, du BA8 au BA50. Le nombre indique l\u2019\u00e9paisseur en centim\u00e8tres.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791548916795\"><strong class=\"schema-faq-question\">Comment choisir le format du Biomattone\u00a0?<\/strong> <p class=\"schema-faq-answer\">On part de la fonction du mur, de l\u2019espace et des performances requises. Le concepteur \u00e9value ensuite la composition de paroi compl\u00e8te.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791548916796\"><strong class=\"schema-faq-question\">Quel format isole le mieux\u00a0?<\/strong> <p class=\"schema-faq-answer\">Le BA50, avec U 0,09 W\/m\u00b2K et un d\u00e9phasage de 32h04&prime;. C\u2019est aussi le plus \u00e9pais, avec 50 cm.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791548916797\"><strong class=\"schema-faq-question\">Quels formats disposent de donn\u00e9es acoustiques et de feu\u00a0?<\/strong> <p class=\"schema-faq-answer\">La fiche indique un Rw de 40 \u00e0 45 dB du BA30 au BA50. Elle indique \u00e9galement EI 180 du BA30 au BA50 et EI 60 pour le BA12.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1791548916798\"><strong class=\"schema-faq-question\">Peut-on choisir le format sans technicien\u00a0?<\/strong> <p class=\"schema-faq-answer\">Mieux vaut \u00e9viter\u00a0: la zone climatique, la composition de paroi et les finitions modifient le r\u00e9sultat\u00a0; une \u00e9valuation sur le projet est donc n\u00e9cessaire.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Comment choisir le format du Biomattone\u00ae\u00a0: crit\u00e8res, tableau comparatif du BA8 au BA50 et cinq \u00e9tapes pour d\u00e9cider avec le technicien.<\/p>\n","protected":false},"author":2,"featured_media":2453,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[17,49,16],"class_list":["post-2634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications-et-mise-en-oeuvre","tag-bolzano","tag-brescia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Comment choisir le format du Biomattone\u00a0: guide du BA8 au BA50<\/title>\n<meta name=\"description\" content=\"Choisir le format du Biomattone\u00a0: BA8 \u00e0 BA50 compar\u00e9s selon \u00e9paisseur, transmission thermique, d\u00e9phasage, acoustique et feu, d\u2019apr\u00e8s la fiche.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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