{"id":7987,"date":"2021-04-14T09:49:42","date_gmt":"2021-04-14T07:49:42","guid":{"rendered":"https:\/\/www.ost.lu\/warum-beschlagen-meine-fenster-von-ausen\/"},"modified":"2026-04-20T15:05:39","modified_gmt":"2026-04-20T13:05:39","slug":"warum-beschlagen-meine-fenster-von-ausen","status":"publish","type":"post","link":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/","title":{"rendered":"Why are my windows fogging up from the outside?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7987\" class=\"elementor elementor-7987 elementor-174\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-33553e95 elementor-section-boxed elementor-section-height-default elementor-section-height-default sc_fly_static\" data-id=\"33553e95\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-extended\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-46fe2a10 sc_content_align_inherit sc_layouts_column_icons_position_left sc_fly_static\" data-id=\"46fe2a10\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1f43d01 sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"1f43d01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Who hasn&#8217;t experienced it? You wake up in the morning and realize: the windows are steamed up. But not from the inside due to poor insulation, but from the outside.<\/p>\n<p>\u00a0<\/p>\n<p>Although it seems unusual, windows can actually steam up from the outside. However, this is no reason to worry! Quite the opposite: because the tarnishing of windows on the outside is a good sign.<\/p>\n<p>\u00a0<\/p>\n<p>This phenomenon only occurs if you have installed windows with triple glazing and excellent insulation values. Because with highly insulating glass, the moist air condenses on the outside during cold nights. The reason for this is the temperature difference between air and window surfaces. Especially in regions with high humidity, where the air warms up faster than the windowpane, the glass fogs up. The heat-reflecting layer on the outside reflects the heat radiation from the room back into the room &#8211; the heat thus remains in the room.\u00a0<\/p>\n<p>\u00a0<\/p>\n<p>Fogged windows from the outside are therefore proof of well-insulated windows and thus a natural, physical effect.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fad6592 sc_fly_static elementor-widget elementor-widget-spacer\" data-id=\"fad6592\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-83626e1 sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"83626e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">External sun protection prevents the window panes from cooling down<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-403ba07f sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"403ba07f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\n<p>Condensation usually only occurs in the early morning hours and disappears again completely by itself. If you are still annoyed by the fact that your view is clouded in the morning, roller shutters, raffstore shutters and textile screens provide a remedy: these protect the pane from cooling. When you lower your roller shutters, raffstore shutters or textile screens at night, an air cushion forms between the panes and the sun protection. The stored heat prevents the window panes from tarnishing.<\/p>\n\n<p>You don&#8217;t have external sun protection? No Problem! We will retrofit roller shutters, raffstore shutters or textil screens: simply enquire <a href=\"https:\/\/www.ost.lu\/contact\/?lang=en\"><strong>here.<\/strong><\/a><\/p>\n\n<div class=\"wp-block-columns has-2-columns\">\n<div class=\"wp-block-column\">\n<div class=\"wp-block-spacer\" style=\"height: 20px;\" aria-hidden=\"true\">\u00a0<\/div>\n\n<p>\u00a0<\/p>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Who hasn&#8217;t experienced it? You wake up in the morning and realize: the windows are steamed up. But not from the inside due to poor insulation, but from the outside.<\/p>\n","protected":false},"author":1,"featured_media":5675,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[62],"tags":[],"class_list":["post-7987","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why are my windows fogging up from the outside? - OST-Fenster<\/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.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why are my windows fogging up from the outside? - OST-Fenster\" \/>\n<meta property=\"og:description\" content=\"Who hasn&#039;t experienced it? You wake up in the morning and realize: the windows are steamed up. But not from the inside due to poor insulation, but from the outside.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/\" \/>\n<meta property=\"og:site_name\" content=\"OST-Fenster\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/OSTFenster\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-14T07:49:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-20T13:05:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ost.lu\/wp-content\/uploads\/2021\/02\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t<meta property=\"og:image:height\" content=\"242\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"kohrmedia\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"kohrmedia\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/\"},\"author\":{\"name\":\"kohrmedia\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#\\\/schema\\\/person\\\/acfee456f8b948758ec2c4478c3642b6\"},\"headline\":\"Why are my windows fogging up from the outside?\",\"datePublished\":\"2021-04-14T07:49:42+00:00\",\"dateModified\":\"2026-04-20T13:05:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/\"},\"wordCount\":291,\"publisher\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ost.lu\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg\",\"articleSection\":[\"Products\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/\",\"url\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/\",\"name\":\"Why are my windows fogging up from the outside? - OST-Fenster\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.ost.lu\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg\",\"datePublished\":\"2021-04-14T07:49:42+00:00\",\"dateModified\":\"2026-04-20T13:05:39+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.ost.lu\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg\",\"contentUrl\":\"https:\\\/\\\/www.ost.lu\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg\",\"width\":350,\"height\":242},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/warum-beschlagen-meine-fenster-von-ausen\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Startseite\",\"item\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Why are my windows fogging up from the outside?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/\",\"name\":\"OST-Fenster\",\"description\":\"Fenster, T\u00fcren, Glassfassaden\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#organization\",\"name\":\"OST-Fenster S.A.\",\"url\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.ost.lu\\\/wp-content\\\/uploads\\\/2020\\\/01\\\/OSTlogo2_retina.png\",\"contentUrl\":\"https:\\\/\\\/www.ost.lu\\\/wp-content\\\/uploads\\\/2020\\\/01\\\/OSTlogo2_retina.png\",\"width\":239,\"height\":182,\"caption\":\"OST-Fenster S.A.\"},\"image\":{\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/OSTFenster\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/ost-fenster\\\/?originalSubdomain=lu\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.ost.lu\\\/en\\\/#\\\/schema\\\/person\\\/acfee456f8b948758ec2c4478c3642b6\",\"name\":\"kohrmedia\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Why are my windows fogging up from the outside? - OST-Fenster","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/","og_locale":"en_US","og_type":"article","og_title":"Why are my windows fogging up from the outside? - OST-Fenster","og_description":"Who hasn't experienced it? You wake up in the morning and realize: the windows are steamed up. But not from the inside due to poor insulation, but from the outside.","og_url":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/","og_site_name":"OST-Fenster","article_publisher":"https:\/\/www.facebook.com\/OSTFenster\/","article_published_time":"2021-04-14T07:49:42+00:00","article_modified_time":"2026-04-20T13:05:39+00:00","og_image":[{"width":350,"height":242,"url":"https:\/\/www.ost.lu\/wp-content\/uploads\/2021\/02\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg","type":"image\/jpeg"}],"author":"kohrmedia","twitter_card":"summary_large_image","twitter_misc":{"Written by":"kohrmedia","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#article","isPartOf":{"@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/"},"author":{"name":"kohrmedia","@id":"https:\/\/www.ost.lu\/en\/#\/schema\/person\/acfee456f8b948758ec2c4478c3642b6"},"headline":"Why are my windows fogging up from the outside?","datePublished":"2021-04-14T07:49:42+00:00","dateModified":"2026-04-20T13:05:39+00:00","mainEntityOfPage":{"@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/"},"wordCount":291,"publisher":{"@id":"https:\/\/www.ost.lu\/en\/#organization"},"image":{"@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#primaryimage"},"thumbnailUrl":"https:\/\/www.ost.lu\/wp-content\/uploads\/2021\/02\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg","articleSection":["Products"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/","url":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/","name":"Why are my windows fogging up from the outside? - OST-Fenster","isPartOf":{"@id":"https:\/\/www.ost.lu\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#primaryimage"},"image":{"@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#primaryimage"},"thumbnailUrl":"https:\/\/www.ost.lu\/wp-content\/uploads\/2021\/02\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg","datePublished":"2021-04-14T07:49:42+00:00","dateModified":"2026-04-20T13:05:39+00:00","breadcrumb":{"@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#primaryimage","url":"https:\/\/www.ost.lu\/wp-content\/uploads\/2021\/02\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg","contentUrl":"https:\/\/www.ost.lu\/wp-content\/uploads\/2021\/02\/csm_Kondensat_-_Glasscheibe_71d21fd101.jpg","width":350,"height":242},{"@type":"BreadcrumbList","@id":"https:\/\/www.ost.lu\/en\/warum-beschlagen-meine-fenster-von-ausen\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Startseite","item":"https:\/\/www.ost.lu\/en\/"},{"@type":"ListItem","position":2,"name":"Why are my windows fogging up from the outside?"}]},{"@type":"WebSite","@id":"https:\/\/www.ost.lu\/en\/#website","url":"https:\/\/www.ost.lu\/en\/","name":"OST-Fenster","description":"Fenster, T\u00fcren, Glassfassaden","publisher":{"@id":"https:\/\/www.ost.lu\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.ost.lu\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.ost.lu\/en\/#organization","name":"OST-Fenster S.A.","url":"https:\/\/www.ost.lu\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.ost.lu\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.ost.lu\/wp-content\/uploads\/2020\/01\/OSTlogo2_retina.png","contentUrl":"https:\/\/www.ost.lu\/wp-content\/uploads\/2020\/01\/OSTlogo2_retina.png","width":239,"height":182,"caption":"OST-Fenster S.A."},"image":{"@id":"https:\/\/www.ost.lu\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/OSTFenster\/","https:\/\/www.linkedin.com\/company\/ost-fenster\/?originalSubdomain=lu"]},{"@type":"Person","@id":"https:\/\/www.ost.lu\/en\/#\/schema\/person\/acfee456f8b948758ec2c4478c3642b6","name":"kohrmedia"}]}},"_links":{"self":[{"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/posts\/7987","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/comments?post=7987"}],"version-history":[{"count":11,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/posts\/7987\/revisions"}],"predecessor-version":[{"id":33146,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/posts\/7987\/revisions\/33146"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/media\/5675"}],"wp:attachment":[{"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/media?parent=7987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/categories?post=7987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ost.lu\/en\/wp-json\/wp\/v2\/tags?post=7987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}