{"id":9644,"date":"2023-04-26T09:30:41","date_gmt":"2023-04-26T07:30:41","guid":{"rendered":"https:\/\/sceaux-lagazette.fr\/?p=9644"},"modified":"2023-04-25T08:31:34","modified_gmt":"2023-04-25T06:31:34","slug":"quelle-isolation-de-son-logement","status":"publish","type":"post","link":"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/26\/quelle-isolation-de-son-logement\/","title":{"rendered":"Quelle isolation de son logement\u00a0?"},"content":{"rendered":"\n

Votre logement est mal isol\u00e9 ? Que faire ? D\u2019abord d\u00e9finir ses objectifs. Puis \u00e9valuer les possibles et les contraintes. Agir, \u00e9ventuellement par \u00e9tapes. Tout un programme, pour lequel il est utile de se faire conseiller.<\/a><\/p>\n\n\n\n

Quels objectifs ?<\/h2>\n\n\n\n

Ceux qui se lancent r\u00e9pondent g\u00e9n\u00e9ralement \u00e0 un ou plusieurs des trois objectifs suivants : am\u00e9liorer son confort, r\u00e9duire sa facture de chauffage, r\u00e9duire ses \u00e9missions de GES.<\/p>\n\n\n\n

L\u2019honn\u00eatet\u00e9 conduit \u00e0 dire que le troisi\u00e8me objectif est rarement le principal, ni m\u00eame un objectif secondaire pour les propri\u00e9taires. C\u2019est pourtant l\u2019objectif affich\u00e9 par les pouvoirs publics, celui qui justifie les aides financi\u00e8res accord\u00e9es.<\/p>\n\n\n\n

Les statistiques globales montrent qu\u2019une partie notable de l\u2019effort d\u2019isolation n\u2019est pas utilis\u00e9e pour r\u00e9duire la facture \u00e9nerg\u00e9tique, mais pour am\u00e9liorer le confort. C\u2019est ce que les sp\u00e9cialistes appellent l\u2019effet rebond.<\/p>\n\n\n\n

Changer d\u2019\u00e9nergie ?<\/h2>\n\n\n\n

Un moyen radical pour baisser ses \u00e9missions de GES en passant \u00e0 une \u00e9nergie d\u00e9carbon\u00e9e. L\u2019\u00e9tude Futurs \u00e9nerg\u00e9tiques 2050<\/a><\/em> de RTE pr\u00e9voit que les logements chauff\u00e9s \u00e0 l\u2019\u00e9lectricit\u00e9 passent de 40% du parc \u00e0 70 % en 2050. La priorit\u00e9 est d\u2019abord \u00e0 la suppression du chauffage au fuel (2 millions de logements aujourd\u2019hui). Mais l\u2019installation d\u2019une pompe \u00e0 chaleur fait partie des pistes \u00e0 \u00e9tudier pour les logements actuellement chauff\u00e9s au gaz.<\/p>\n\n\n\n

La g\u00e9othermie constitue une autre source bas-carbone possible. De nombreux projets sont actuellement \u00e0 l\u2019\u00e9tude sur le territoire de VSGP, par exemple \u00e0 Fontenay-Sceaux-Bourg-la-Reine<\/a>. Il est cependant probable que ces projets donnent la priorit\u00e9 aux b\u00e2timents publics et aux grands ensembles, sociaux ou non.<\/p>\n\n\n\n

Petits ou grands travaux ?<\/h2>\n\n\n\n

Une \u00e9tude <\/a>de l\u2019ADEME a montr\u00e9 (p34) que le co\u00fbt de l\u2019isolation par tonne de CO2 \u00e9conomis\u00e9 est nettement plus faible pour les passoires \u00e9nerg\u00e9tiques que pour les logements d\u00e9j\u00e0 moyennement bien isol\u00e9s. On comprend assez ais\u00e9ment que le retour sur investissement sera plus facile si on \u00e9conomise un tiers d\u2019une grosse facture que si c\u2019est le tiers d\u2019une petite facture. D\u2019autant plus qu\u2019il est plus facile de r\u00e9duire un tiers d\u2019une grosse facture que d\u2019une petite.<\/p>\n\n\n\n

Si on raisonne de mani\u00e8re plus analytique, on aura int\u00e9r\u00eat \u00e0 renforcer fortement une zone mal isol\u00e9e. Mais que faire si l\u2019isolation de d\u00e9part est moyenne ? Par exemple, remplacer des vieilles fen\u00eatres en simple vitrage est g\u00e9n\u00e9ralement une bonne solution. Mais que faire d\u2019une fen\u00eatre en double vitrage dont l\u2019encadrement est peu isol\u00e9 ?<\/p>\n\n\n\n

On peut identifier deux types de strat\u00e9gies, suivant les caract\u00e9ristiques du logement et les moyens disponibles.<\/p>\n\n\n\n

La premi\u00e8re consiste \u00e0 privil\u00e9gier la diminution cons\u00e9quente des pertes thermiques du logement. En agissant sur un maximum d\u2019origine de fuites, donc partout o\u00f9 l\u2019isolation n\u2019est pas au niveau vis\u00e9. Par exemple, si le toit est bien isol\u00e9, en changeant toutes les pertes et fen\u00eatres tout en isolant tous les murs.<\/p>\n\n\n\n

La seconde consiste \u00e0 s\u2019attaquer aux points particuli\u00e8rement faibles du logement. C\u2019est une op\u00e9ration g\u00e9n\u00e9ralement moins ambitieuse. Elle peut s\u2019envisager dans un logement d\u00e9j\u00e0 partiellement isol\u00e9 mais qui poss\u00e8de un point faible manifeste (ou plusieurs). Cela consistera par exemple \u00e0 changer une porte d\u2019entr\u00e9e ou \u00e0 renforcer l\u2019isolation pr\u00e8s d\u2019une fuite manifeste. Le gain attendu sur la facture sera d\u2019autant plus faible qu\u2019on aura probablement un effet rebond : l\u2019op\u00e9ration vise surtout \u00e0 am\u00e9liorer le confort.<\/p>\n\n\n\n

Les visites thermiques r\u00e9alis\u00e9es par l\u2019association ZEN 2050 ont montr\u00e9 que ces points de faiblesse sont souvent connus des propri\u00e9taires, justement parce qu\u2019ils cr\u00e9ent de l\u2019inconfort. L\u2019analyse \u00e0 la cam\u00e9ra permet surtout de pr\u00e9ciser les choses. Cependant, les pertes occasionn\u00e9es par des portes de garage tr\u00e8s mal isol\u00e9es sont souvent sous-estim\u00e9es, parce qu\u2019elles ne cr\u00e9ent qu\u2019un inconfort diffus.<\/p>\n\n\n\n

Agir par \u00e9tapes plut\u00f4t qu\u2019au moindre co\u00fbt <\/h2>\n\n\n\n

Les organismes pr\u00e9sents sur le territoire pour prodiguer des conseils de r\u00e9novation auront tendance \u00e0 proposer un programme d\u2019isolation complet, celui qui permet de r\u00e9duire au maximum les \u00e9missions de GES. Cela peut repr\u00e9senter des d\u00e9penses tr\u00e8s importantes.<\/p>\n\n\n\n

Il est g\u00e9n\u00e9ralement possible de proc\u00e9der par \u00e9tapes, \u00e0 la seule condition d\u2019anticiper les raccordements entre deux zones proches, mais faisant l\u2019objet de travaux d\u2019\u00e9tapes diff\u00e9rentes.<\/p>\n\n\n\n

Il faut surtout avoir \u00e0 l\u2019esprit qu\u2019\u00e9conomiser sur une op\u00e9ration n\u2019est pratiquement jamais une bonne solution. Limiter l\u2019\u00e9paisseur d\u2019isolant pour gagner quelques pour cent est contre-productif. On le voit lors des diagnostics, avec des travaux d\u2019isolation ant\u00e9rieurs insuffisants : refaire est toujours plus cher que faire bien du premier coup.<\/p>\n\n\n\n

Comment \u00e9valuer son niveau d\u2019isolation ?<\/h2>\n\n\n\n

L\u2019association ZEN2050 Maintenant<\/em> anime des balades thermiques \u00e0 Sceaux. Elle collabore avec des associations locales pour faire de m\u00eame \u00e0 Bourg-la-Reine, Ch\u00e2tenay-Malabry ou Fontenay-aux-Roses. Elle r\u00e9alise des visites thermiques chez les particuliers. Cela constitue une premi\u00e8re approche du logement, \u00e0 compl\u00e9ter par un diagnostic par des professionnels si des travaux doivent \u00eatre r\u00e9alis\u00e9s.<\/p>\n\n\n\n

On l’a compris, pour isoler son logement, on retrouve des \u00e9tapes classiques : diagnostiquer, d\u00e9finir ses objectifs, comparer les solutions possibles, faire appel \u00e0 des artisans s\u00e9rieux, surveiller les travaux. Et ne pas oublier les aides financi\u00e8res.<\/p>\n","protected":false},"excerpt":{"rendered":"

Votre logement est mal isol\u00e9 ? Que faire ? D\u2019abord d\u00e9finir ses objectifs. Puis \u00e9valuer les possibles et les contraintes. Agir, \u00e9ventuellement par \u00e9tapes. Tout un programme, pour lequel il est utile de se faire conseiller. Quels objectifs ? Ceux qui se lancent r\u00e9pondent g\u00e9n\u00e9ralement \u00e0 un ou plusieurs des trois objectifs suivants :…<\/p>\n","protected":false},"author":11,"featured_media":9647,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[53],"tags":[],"class_list":["post-9644","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analyses","entry","simple"],"yoast_head":"\nQuelle isolation de son logement\u00a0? - La Gazette<\/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:\/\/sceaux-lagazette.fr\/index.php\/2023\/04\/26\/quelle-isolation-de-son-logement\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quelle isolation de son logement\u00a0? - La Gazette\" \/>\n<meta property=\"og:description\" content=\"Votre logement est mal isol\u00e9 ? Que faire ? D\u2019abord d\u00e9finir ses objectifs. Puis \u00e9valuer les possibles et les contraintes. Agir, \u00e9ventuellement par \u00e9tapes. Tout un programme, pour lequel il est utile de se faire conseiller. Quels objectifs ? 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