![\"\"](\"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-content\/uploads\/2026\/03\/DOC4-DeperditionChaleur.jpg\")
<\/p>\nDans une maison individuelle non isol\u00e9e, les parts des d\u00e9perditions de chaleur sont :<\/p>\n
<\/p>\n
Une mauvaise isolation du toit peut \u00eatre d\u00e9tectable en hiver par temps de neige. Quand la neige fond plus vite sur un toit que sur les autres, cela r\u00e9v\u00e8le les toits mal isol\u00e9s.<\/p>\n
Pour am\u00e9liorer le confort thermique, on peut utiliser des isolants tels que :\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isolants min\u00e9raux ( laine de verre, laine de roche, etc… )\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0![\"\"](\"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-content\/uploads\/2026\/03\/DOC4-Toit-mal-isole.jpg\")
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isolants naturels : Isolants v\u00e9g\u00e9taux (li\u00e8ge, fibre de lin \u2026)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Isolants animaux (laine de mouton, plumes de canards …)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isolants synth\u00e9tiques (polystyr\u00e8ne expans\u00e9 …)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isolants nouvelles g\u00e9n\u00e9rations ( brique monomur …)\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isolants mince aussi appel\u00e9s <<isolants r\u00e9flecteurs>>. Ils sont assembl\u00e9s d’une ou plusieurs couches d’aluminium ou film plastique.<\/p>\n
On am\u00e9liore l’isolation thermique d’un mat\u00e9riau en augmentant son \u00e9paisseur. Pour une efficacit\u00e9 optimale, toutes les parois doivent \u00eatre isol\u00e9es. Pour une habitation, on isole les murs ext\u00e9rieurs, le plancher sur vide sanitaire et le plafond sous les combles.<\/p>\n
La performance thermique d’un mat\u00e9riel isolant s’appelle la r\u00e9sistance thermique R. Plus R est grand et plus le mat\u00e9riau est isolant. R d\u00e9pend de deux param\u00e8tres : en fonction de la conductivit\u00e9 thermique \u03bb propre \u00e0 chaque mat\u00e9riau et en fonctionne son \u00e9paisseur e.<\/p>\n
![\"\"](\"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-content\/uploads\/2026\/03\/DOC4-Tableau-resistance-thermique.jpg\")
<\/p>\n","protected":false},"excerpt":{"rendered":"
Dans une maison individuelle non isol\u00e9e, les parts des d\u00e9perditions de chaleur sont : 25 \u00e0 30% pour le toit 20 \u00e0 25% pour les murs 20 \u00e0 25% pour l’air renouvel\u00e9 et fuites 10 \u00e0 15% pour les fen\u00eatres 7 \u00e0 10% pour le plancher bas 5 \u00e0 10% pour les ponts thermiques Une … Lire la suite<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-507","post","type-post","status-publish","format-standard","hentry","category-table-2-groupe-2"],"_links":{"self":[{"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/posts\/507","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/comments?post=507"}],"version-history":[{"count":2,"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/posts\/507\/revisions"}],"predecessor-version":[{"id":601,"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/posts\/507\/revisions\/601"}],"wp:attachment":[{"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/media?parent=507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/categories?post=507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.saint-paul-angouleme.fr\/blogs4\/402\/wp-json\/wp\/v2\/tags?post=507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}