[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.zkz-cv.cz\/internetem-se-siri-nesmyslne-famy-o-polystyrenu\/#Article","mainEntityOfPage":"https:\/\/www.zkz-cv.cz\/internetem-se-siri-nesmyslne-famy-o-polystyrenu\/","headline":"Internetem se \u0161\u00ed\u0159\u00ed nesmysln\u00e9 f\u00e1my o polystyrenu","name":"Internetem se \u0161\u00ed\u0159\u00ed nesmysln\u00e9 f\u00e1my o polystyrenu","description":"D\u00fdch\u00e1n\u00ed zdiva Velmi roz\u0161\u00ed\u0159en\u00fd m\u00fdtus o nepropustnosti zaizolovan\u00e9ho zdiva se \u0161\u00ed\u0159\u00ed ve spole\u010dnosti jako epidemie. M\u011bli bychom si v\u0161ak objasnit z\u00e1kladn\u00ed pojmy o zdivu, tedy o cihle, tv\u00e1rnic\u00edch a betonu. Ty toti\u017e samy o sob\u011b, v\u010detn\u011b v\u00e1penn\u00fdch om\u00edtek a s\u00e1drokartonu, propou\u0161t\u00ed pouze 5 procent vzduchov\u00e9 hmoty. Ve skute\u010dnosti tak v\u00a0nezateplen\u00e9m dom\u011b k\u00a0v\u00fdm\u011bn\u011b vzduchu prakticky nedoch\u00e1z\u00ed...","datePublished":"2025-03-01","dateModified":"2025-03-01","author":{"@type":"Person","@id":"https:\/\/www.zkz-cv.cz\/author\/#Person","name":"","url":"https:\/\/www.zkz-cv.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/91b1fc57487c55a66a7777af0dd690bf69c571b4a9b15cda0db8854a78b7888c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/91b1fc57487c55a66a7777af0dd690bf69c571b4a9b15cda0db8854a78b7888c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"zkz-cv.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.zkz-cv.cz\/wp-content\/uploads\/img_a341354_w2725_t1554026214.jpg","url":"https:\/\/www.zkz-cv.cz\/wp-content\/uploads\/img_a341354_w2725_t1554026214.jpg","height":0,"width":0},"url":"https:\/\/www.zkz-cv.cz\/internetem-se-siri-nesmyslne-famy-o-polystyrenu\/","wordCount":419,"articleBody":"\tD\u00fdch\u00e1n\u00ed zdiva\tVelmi roz\u0161\u00ed\u0159en\u00fd m\u00fdtus o nepropustnosti zaizolovan\u00e9ho zdiva se \u0161\u00ed\u0159\u00ed ve spole\u010dnosti jako epidemie. M\u011bli bychom si v\u0161ak objasnit z\u00e1kladn\u00ed pojmy o zdivu, tedy o cihle, tv\u00e1rnic\u00edch a betonu. Ty toti\u017e samy o sob\u011b, v\u010detn\u011b v\u00e1penn\u00fdch om\u00edtek a s\u00e1drokartonu, propou\u0161t\u00ed pouze 5 procent vzduchov\u00e9 hmoty. Ve skute\u010dnosti tak v\u00a0nezateplen\u00e9m dom\u011b k\u00a0v\u00fdm\u011bn\u011b vzduchu prakticky nedoch\u00e1z\u00ed vlivem zdiva, ale pouze v\u011btr\u00e1n\u00edm otev\u0159en\u00fdmi dve\u0159mi a okny, p\u0159\u00edpadn\u011b klimatizac\u00ed, digesto\u0159\u00ed a rekupera\u010dn\u00ed jednotkou.\t\tPodstatn\u00e9 je tedy zajistit dostate\u010dn\u00e9 v\u011btr\u00e1n\u00ed v\u00a0pr\u016fb\u011bhu dne a zejm\u00e9na p\u0159i sp\u00e1nku v\u00a0lo\u017enici, a to otev\u00edr\u00e1n\u00edm oken a v\u00fdm\u011bnou vzduchov\u00e9 hmoty za \u010derstv\u00fd vzduch. Izolace z\u00a0polystyrenu m\u00e1 na tato fakta opravdu zanedbateln\u00fd vliv.\tPl\u00edsn\u011b\tVysr\u00e1\u017een\u00e1 voda a tvorba pl\u00edsn\u00ed je dal\u0161\u00edm \u00fadajn\u00fdm d\u016fvodem, pro\u010d od tohoto materi\u00e1lu upustit. Ve skute\u010dnosti to v\u0161ak b\u00fdv\u00e1 naopak. Tzv. kondenza\u010dn\u00ed z\u00f3na se u vn\u011bj\u0161\u00ed izolace posouv\u00e1 sm\u011brem ven, uvnit\u0159 objektu na st\u011bn\u00e1ch je t\u00edm p\u00e1dem vy\u0161\u0161\u00ed teplota, kter\u00e1 se nebl\u00ed\u017e\u00ed rosn\u00e9mu bodu a proto tu ani nem\u016f\u017ee doj\u00edt ke sr\u00e1\u017een\u00ed vodn\u00ed p\u00e1ry. Pl\u00edsn\u011b se mohou vytv\u00e1\u0159et pouze u vnit\u0159n\u00edch izolac\u00ed, kdy je kondenza\u010dn\u00ed z\u00f3na ji\u017e uvnit\u0159 domu, a tak\u00e9 u oken a dve\u0159\u00ed, kter\u00e9 jsou nesmysln\u011b ut\u011bsn\u011bn\u00e9 silikonov\u00fdmi vycp\u00e1vkami, a kde se tak\u00e9 minim\u00e1ln\u011b v\u011btr\u00e1.\t\tTrvanlivost materi\u00e1lu\tNa za\u010d\u00e1tku devades\u00e1t\u00fdch let, kdy se s\u00a0polystyrenem na fas\u00e1d\u00e1ch za\u010d\u00ednalo, se \u0161\u00ed\u0159ila na ve\u0159ejnosti f\u00e1ma o postupn\u00e9m rozpadu desek pod fas\u00e1dou, drolen\u00ed a po\u0161kozen\u00ed om\u00edtky. K\u00a0tomuto jevu n\u011bkdy skute\u010dn\u011b doch\u00e1zelo, a to v\u00a0souvislosti s\u00a0nevhodn\u011b zvolen\u00fdm pracovn\u00edm postupem. Materi\u00e1l m\u016f\u017ee degradovat jen p\u0159i vy\u0161\u0161\u00edch teplot\u00e1ch nad 80 stup\u0148\u016f a p\u0159i kontaktu s\u00a0organick\u00fdmi rozpou\u0161t\u011bdly. V\u011bt\u0161ina stavebn\u00edch firem v\u0161ak db\u00e1 na spr\u00e1vn\u00e9 postupy a s\u00a0t\u00edmto probl\u00e9mem se ji\u017e prakticky nesetk\u00e1te. Potvrdila se i dlouhodob\u00e1 trvanlivost, kdy k\u00a0degradaci polystyrenu a k\u00a0jeho \u00fapln\u00e9mu rozpadu nedojde ani za n\u011bkolik des\u00edtek let. Takov\u00e1 fas\u00e1da v\u00e1s tedy s\u00a0nejv\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed p\u0159e\u017eije.                                                                                                                                                                                                                                                                                                                                                                                                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