{"id":30737,"date":"2019-06-04T14:54:24","date_gmt":"2019-06-04T12:54:24","guid":{"rendered":"http:\/\/136.144.181.85\/~nedzink\/technicke-info\/stavebni-fyzika\/odvetravane-konstrukce\/"},"modified":"2019-06-04T14:54:24","modified_gmt":"2019-06-04T12:54:24","slug":"odvetravane-konstrukce","status":"publish","type":"page","link":"https:\/\/www.nedzink.com\/cs\/odvetravane-konstrukce\/","title":{"rendered":"Odv\u011btr\u00e1van\u00e9 konstrukce"},"content":{"rendered":"<p>\n\t&nbsp;<\/p>\n<p>\n\tOdv\u011btr&aacute;van&eacute; konstrukce st\u0159ech a st\u011bn, kter&eacute; maj&iacute; pod kryc&iacute; vrstvou v\u011btranou mezeru, maj&iacute; p\u0159i spr&aacute;vn\u011b funguj&iacute;c&iacute;m pohybu vzduchu odv&aacute;d\u011bt vlhkost proniklou do konstrukce pomoc&iacute; otvor\u016f pro p\u0159iv&aacute;d\u011bn&yacute; a odv&aacute;d\u011bn&yacute; vzduch.<\/p>\n<p>\n\tAby byla zaji&scaron;t\u011bna bezpe\u010dn&aacute; a spolehliv&aacute; funkce odv\u011btr&aacute;van&yacute;ch konstrukc&iacute;, je nutn&eacute; dodr\u017eet n\u011bkter&eacute; <strong>p\u0159edpoklady<\/strong>:<\/p>\n<ul>\n<li style=\"margin-left: 18pt; \">\n\t\t&nbsp; &nbsp;V\u011btrac&iacute; mezera nem\u016f\u017ee eliminovat chyby a zanedb&aacute;n&iacute; p\u0159i zajist\u011bn&iacute; cel&eacute; konstrukce proti proud\u011bn&iacute; vzduchu a v\u011btru.<\/li>\n<li style=\"margin-left: 18pt; \">\n\t\t&nbsp; &nbsp;Do konstrukce je nutn&eacute; zabudovat vhodn&eacute; paroz&aacute;brany a difuzn&iacute; izolace a napojit je na navazuj&iacute;c&iacute; stavebn&iacute; d&iacute;ly tak, aby byly vzduchot\u011bsn&eacute;.<\/li>\n<li style=\"margin-left: 18pt; \">\n\t\t&nbsp; &nbsp;Vzduchov&aacute; mezera mus&iacute; umo\u017e\u0148ovat nep\u0159eru&scaron;ovan&eacute; proud\u011bn&iacute; vzduchu.<\/li>\n<li style=\"margin-left: 18pt; \">\n\t\t&nbsp; &nbsp;Zabudov&aacute;van&eacute; materi&aacute;ly mus&iacute; b&yacute;t zcela such&eacute;.<\/li>\n<li style=\"margin-left: 18pt; \">\n\t\t&nbsp; &nbsp;Po dobu v&yacute;stavby se p\u0159echodn\u011b chr&aacute;n&iacute; otev\u0159en&eacute; spoje a sp&aacute;ry proti pronik&aacute;n&iacute; vlhkosti ze sr&aacute;\u017eek.<\/li>\n<li style=\"margin-left: 18pt; \">\n\t\t&nbsp; &nbsp;Tepeln&aacute; izolace mus&iacute; b&yacute;t ulo\u017eena beze sp&aacute;r.<\/li>\n<\/ul>\n<p>\n\tHlavn&iacute; p\u016fsoben&iacute; funguj&iacute;c&iacute;ho odv\u011btr&aacute;n&iacute;:<\/p>\n<p>\n\tObsah vlhkosti ve vn\u011bj&scaron;&iacute;m vzduchu<\/p>\n<p>\n\tV z&aacute;vislosti na obsahu vlhkosti ve vn\u011bj&scaron;&iacute;m vzduchu, kter&yacute; proud&iacute; dovnit\u0159, m\u016f\u017ee doch&aacute;zet p\u0159i stejn&eacute;m mno\u017estv&iacute; vzduchu k v\u011bt&scaron;&iacute;mu \u010di men&scaron;&iacute;mu transportu vlhkosti.<\/p>\n<p>\n\t<strong>Proud\u011bn&iacute; vzduchu<\/strong><\/p>\n<p>\n\tJe t\u0159eba vytvo\u0159it pokud mo\u017eno p\u0159&iacute;mou v\u011btrac&iacute; mezeru bez dodate\u010dn&yacute;ch omezen&iacute;.<\/p>\n<p>\n\t<strong>Zah\u0159&aacute;t&iacute; proudu vzduchu zbytkov&yacute;m teplem zevnit\u0159 budovy<\/strong><\/p>\n<p>\n\tSe zlep&scaron;enou kvalitou izola\u010dn&iacute;ch materi&aacute;l\u016f, jejich st&aacute;le v\u011bt&scaron;&iacute; tlou&scaron;\u0165kou a z toho vypl&yacute;vaj&iacute;c&iacute; lep&scaron;&iacute; tepelnou ochranou se dostane st&aacute;le m&eacute;n\u011b &bdquo;tepeln&eacute; energie&ldquo; do v\u011btrac&iacute; mezery. T&iacute;m odpad&aacute; faktor, kter&yacute; v minulosti podporovala nauka o teple t&yacute;kaj&iacute;c&iacute; se v\u011btrac&iacute;ch mezer.<\/p>\n<p>\n\t<strong>V&yacute;&scaron;ka v\u011btran&eacute;ho prostoru<\/strong><\/p>\n<p>\n\tV z&aacute;vislosti na sklonu konstrukce je nutn&eacute; dodr\u017eet minim&aacute;ln&iacute; v&yacute;&scaron;ky v\u011btran&eacute;ho prostoru.<\/p>\n<p>\n\t<strong>Tabulka 1:<\/strong><\/p>\n<table border=\"1\" cellpadding=\"0\" cellspacing=\"0\" style=\"width: 600px\">\n<tbody>\n<tr>\n<td>\n\t\t\t\tSklon<\/td>\n<td>\n\t\t\t\tVoln&yacute; pr\u016f\u0159ez&nbsp;v\u011btran&eacute;&nbsp;mezery<\/td>\n<td>\n\t\t\t\tVoln&aacute; plocha nas&aacute;vac&iacute;ch otvor\u016f vzhledem ke st\u0159e&scaron;n&iacute; plo&scaron;e<\/td>\n<td>\n\t\t\t\tVoln&aacute; plocha odv&aacute;d\u011bc&iacute;ch otvor\u016f vzhledem ke st\u0159e&scaron;n&iacute; plo&scaron;e<\/td>\n<\/tr>\n<tr>\n<td>\n\t\t\t\t&nbsp;<\/td>\n<td>\n\t\t\t\t&nbsp;<\/td>\n<td>\n\t\t\t\t&nbsp;<\/td>\n<td>\n\t\t\t\t&nbsp;<\/td>\n<\/tr>\n<tr>\n<td>\n\t\t\t\t&ge;3&deg; &le;20&deg;<\/td>\n<td>\n\t\t\t\t100 mm<\/td>\n<td>\n\t\t\t\t1\/500<\/td>\n<td>\n\t\t\t\t1\/400<\/td>\n<\/tr>\n<tr>\n<td>\n\t\t\t\t&gt;20&deg;<\/td>\n<td>\n\t\t\t\t50 mm<\/td>\n<td>\n\t\t\t\t1\/500<\/td>\n<td>\n\t\t\t\t1\/400<\/td>\n<\/tr>\n<tr>\n<td>\n\t\t\t\t&ge;3&deg; &le;10&deg;<\/td>\n<td>\n\t\t\t\t100 mm p\u0159&iacute;\u010dn&eacute;&nbsp;v\u011btr&aacute;n&iacute;<\/td>\n<td>\n\t\t\t\t&nbsp;<\/td>\n<td>\n\t\t\t\t&nbsp;<\/td>\n<\/tr>\n<tr>\n<td>\n\t\t\t\tFas&aacute;da&nbsp; 90&deg;<\/td>\n<td>\n\t\t\t\t20 mm<\/td>\n<td>\n\t\t\t\t1\/1000<\/td>\n<td>\n\t\t\t\t1\/800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td style=\"width:65px;\">\n<p>\n\t\t\t\t\tFas&aacute;da 90&deg;<\/p>\n<\/td>\n<td style=\"width:141px;\">\n<p>\n\t\t\t\t\t20 mm<\/p>\n<\/td>\n<td style=\"width:192px;\">\n<p>\n\t\t\t\t\t1\/1000<\/p>\n<\/td>\n<td style=\"width:212px;\">\n<p>\n\t\t\t\t\t1\/800<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\n\t&nbsp;<\/p>\n<p>\n\t&nbsp;<\/p>\n<p>\n\t<strong>D&eacute;lka v\u011btran&eacute; mezery<\/strong><\/p>\n<p>\n\tJestli\u017ee p\u0159evy&scaron;uje d&eacute;lka v\u011btran&eacute; mezery cca 15 m, m\u016f\u017ee proud\u011bn&iacute; vzduchu t\u0159en&iacute;m o soused&iacute;c&iacute; konstrukce zaniknout. Jestli\u017ee jsou navr\u017eeny velk&eacute; osov&eacute; vzd&aacute;lenosti krokv&iacute;, m\u011bly by se rozd\u011blit do jednotliv&yacute;ch v\u011btrac&iacute;ch &uacute;sek\u016f.<\/p>\n<p>\n\t<strong>Sklon konstrukce<\/strong><\/p>\n<p>\n\tJak je zn&aacute;zorn\u011bno v <em>tabulce 1<\/em>, m&aacute; sklon st\u0159echy projektovan&eacute; konstrukce rozhoduj&iacute;c&iacute; vliv na funkci prov\u011btr&aacute;v&aacute;n&iacute;. Je t\u0159eba d&aacute;t pozor na to, aby byly zm\u011bny sklon\u016f zahrnuty do konstrukce v\u011btrac&iacute; mezery.<\/p>\n<p>\n\t<strong>Otvory pro p\u0159iv&aacute;d\u011bn&yacute; a odv&aacute;d\u011bn&yacute; vzduch<\/strong><\/p>\n<p>\n\tOtvory pro odv&aacute;d\u011bn&iacute; vzduchu se navrhuj&iacute; v\u017edy v nejvy&scaron;&scaron;&iacute;m m&iacute;st\u011b a nas&aacute;vac&iacute; otvory na spodu v\u011btran&eacute; mezry, aby byla dosa\u017eena co mo\u017en&aacute; nejvy&scaron;&scaron;&iacute; &uacute;\u010dinn&aacute; v&yacute;&scaron;ka.<\/p>\n<p>\n\tOtvory maj&iacute; b&yacute;t provedeny jako pr\u016fb\u011b\u017en&eacute; dr&aacute;\u017eky, proto\u017ee jednotliv&eacute; otvory vykazuj&iacute; p\u0159i stejn&eacute;m pr\u016f\u0159ezu pro odv\u011btr&aacute;v&aacute;n&iacute; hor&scaron;&iacute; &uacute;\u010dinnost. Jestli\u017ee se pou\u017eij&iacute; z d\u016fvodu ochrany p\u0159ed hmyzem v\u011btrac&iacute; m\u0159&iacute;\u017eky, potom je t\u0159eba zajistit, aby m\u011bl zb&yacute;vaj&iacute;c&iacute; pr\u016f\u0159ez pot\u0159ebnou velikost pro odv\u011btr&aacute;n&iacute;. Jinak je t\u0159eba zv\u011bt&scaron;it rozm\u011bry v&yacute;\u0159ezu pro odv\u011btr&aacute;v&aacute;n&iacute;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Odv\u011btr&aacute;van&eacute; konstrukce st\u0159ech a st\u011bn, kter&eacute; maj&iacute; pod kryc&iacute; vrstvou v\u011btranou mezeru, maj&iacute; p\u0159i spr&aacute;vn\u011b funguj&iacute;c&iacute;m pohybu vzduchu odv&aacute;d\u011bt vlhkost proniklou do konstrukce pomoc&iacute; otvor\u016f pro p\u0159iv&aacute;d\u011bn&yacute; a odv&aacute;d\u011bn&yacute; vzduch. Aby byla zaji&scaron;t\u011bna bezpe\u010dn&aacute; a spolehliv&aacute; funkce odv\u011btr&aacute;van&yacute;ch konstrukc&iacute;, je nutn&eacute; dodr\u017eet n\u011bkter&eacute; p\u0159edpoklady: &nbsp; &nbsp;V\u011btrac&iacute; mezera nem\u016f\u017ee eliminovat chyby a zanedb&aacute;n&iacute; p\u0159i zajist\u011bn&iacute; [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":0,"menu_order":680,"comment_status":"closed","ping_status":"closed","template":"template-import.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-30737","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Odv\u011btr\u00e1van\u00e9 konstrukce \u2013 NedZink<\/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:\/\/www.nedzink.com\/cs\/odvetravane-konstrukce\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Odv\u011btr\u00e1van\u00e9 konstrukce \u2013 NedZink\" \/>\n<meta property=\"og:description\" content=\"&nbsp; Odv\u011btr&aacute;van&eacute; konstrukce st\u0159ech a st\u011bn, kter&eacute; maj&iacute; pod kryc&iacute; vrstvou v\u011btranou mezeru, maj&iacute; p\u0159i spr&aacute;vn\u011b funguj&iacute;c&iacute;m pohybu vzduchu odv&aacute;d\u011bt vlhkost proniklou do konstrukce pomoc&iacute; otvor\u016f pro p\u0159iv&aacute;d\u011bn&yacute; a odv&aacute;d\u011bn&yacute; vzduch. 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