{"id":10550,"date":"2026-03-09T03:11:03","date_gmt":"2026-03-09T03:11:03","guid":{"rendered":"https:\/\/aprodoor.com\/?p=10550"},"modified":"2026-03-09T03:22:51","modified_gmt":"2026-03-09T03:22:51","slug":"sprossenfenster","status":"publish","type":"post","link":"https:\/\/aprodoor.com\/de\/mullions-vs-muntins-window\/","title":{"rendered":"Pfosten- vs. Sprossenfenster: Leitfaden zu den wichtigsten Unterschieden"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"10550\" class=\"elementor elementor-10550\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fc6eacf e-flex e-con-boxed e-con e-parent\" data-id=\"fc6eacf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1809467 elementor-widget elementor-widget-text-editor\" data-id=\"1809467\" 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<article class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"request-699d39ed-82d0-83a0-bc80-2bbcd4ec58b4-7\" data-testid=\"conversation-turn-154\" data-scroll-anchor=\"false\" data-turn=\"assistant\"><div class=\"text-base my-auto mx-auto [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"><div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"><div class=\"flex max-w-full flex-col gap-4 grow\"><div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+&amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"71fee1c9-6da0-43d3-b0ff-d2ecc4412e24\" data-message-model-slug=\"gpt-5-3\"><div class=\"flex w-full flex-col gap-1 empty:hidden\"><div class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"><h2 data-section-id=\"8t2xjr\" data-start=\"0\" data-end=\"28\">What Is a Window Mullion?<\/h2><p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-10545\" title=\"Slim Black Mullions with Large Glass Spans Black Glass Window Design\" src=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design.webp\" alt=\"Slim Black Mullions with Large Glass Spans Black Glass Window Design\" width=\"450\" height=\"253\" srcset=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design.webp 2200w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design-500x281.webp 500w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design-1024x576.webp 1024w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design-768x432.webp 768w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design-1536x864.webp 1536w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design-2048x1152.webp 2048w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Slim-Black-Mullions-with-Large-Glass-Spans-Black-Glass-Window-Design-18x10.webp 18w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p><p data-start=\"46\" data-end=\"317\">A <strong data-start=\"48\" data-end=\"66\">window mullion<\/strong> is a structural bar that separates two or more window units. It divides the <a href=\"https:\/\/aprodoor.com\/types-of-window-frames\/\">window frame<\/a> into sections and helps support larger window assemblies. Mullions are commonly used in large window walls, <a href=\"https:\/\/aprodoor.com\/curtain-wall-supplier\/\">curtain wall systems<\/a>, and multi-panel window designs.<\/p><p data-start=\"319\" data-end=\"433\">Mullions can be placed <strong data-start=\"342\" data-end=\"372\">vertically or horizontally<\/strong>, depending on the window layout and structural requirements.<\/p><h3 data-section-id=\"1c54oiz\" data-start=\"435\" data-end=\"463\">Types of Window Mullions<\/h3><ul data-start=\"465\" data-end=\"933\"><li data-section-id=\"3qyb44\" data-start=\"465\" data-end=\"602\"><p data-start=\"467\" data-end=\"602\"><strong data-start=\"467\" data-end=\"489\">Vertical Mullions:<\/strong> Run vertically between window units and are the most common type used in <a href=\"https:\/\/aprodoor.com\/residential-vs-commercial-construction\/\">residential and commercial buildings<\/a>.<\/p><\/li><li data-section-id=\"n3v73l\" data-start=\"603\" data-end=\"728\"><p data-start=\"605\" data-end=\"728\"><strong data-start=\"605\" data-end=\"629\">Horizontal Mullions:<\/strong> Run across window sections and are often combined with vertical mullions for additional support.<\/p><\/li><li data-section-id=\"1rj1meb\" data-start=\"729\" data-end=\"837\"><p data-start=\"731\" data-end=\"837\"><strong data-start=\"731\" data-end=\"755\">Structural Mullions:<\/strong> Load-bearing components that help support large glass panels or window systems.<\/p><\/li><li data-section-id=\"18ab1uc\" data-start=\"838\" data-end=\"933\"><p data-start=\"840\" data-end=\"933\"><strong data-start=\"840\" data-end=\"864\">Decorative Mullions:<\/strong> Used mainly for <a href=\"https:\/\/aprodoor.com\/modern-architectural-styles\/\">architectural style<\/a> rather than structural strength.<\/p><\/li><\/ul><h2 data-section-id=\"lrnybm\" data-start=\"940\" data-end=\"967\">What Is a Window Muntin?<\/h2><p><img decoding=\"async\" class=\"aligncenter wp-image-10558\" title=\"Classic home with multi pane muntin windows\" src=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Classic-home-with-multi-pane-muntin-windows.webp\" alt=\"Classic home with multi pane muntin windows\" width=\"378\" height=\"450\" srcset=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Classic-home-with-multi-pane-muntin-windows.webp 928w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Classic-home-with-multi-pane-muntin-windows-420x500.webp 420w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Classic-home-with-multi-pane-muntin-windows-861x1024.webp 861w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Classic-home-with-multi-pane-muntin-windows-768x914.webp 768w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Classic-home-with-multi-pane-muntin-windows-10x12.webp 10w\" sizes=\"(max-width: 378px) 100vw, 378px\" \/><\/p><p data-start=\"985\" data-end=\"1212\">A <strong data-start=\"987\" data-end=\"1004\">window muntin<\/strong> is a narrow strip of wood, metal, or vinyl that divides the glass within a single window into smaller panes. Unlike mullions, muntins are located within the window sash and are mainly used for visual design.<\/p><p data-start=\"1214\" data-end=\"1390\">Historically, muntins were necessary to hold multiple small pieces of glass together. Today, they are often used as decorative grids that give windows a traditional appearance.<\/p><h3 data-section-id=\"1pu5nzy\" data-start=\"1392\" data-end=\"1419\">Types of Window Muntins<\/h3><ul data-start=\"1421\" data-end=\"1746\" data-is-last-node=\"\" data-is-only-node=\"\"><li data-section-id=\"s3whlx\" data-start=\"1421\" data-end=\"1512\"><p data-start=\"1423\" data-end=\"1512\"><strong data-start=\"1423\" data-end=\"1452\">True Divided Light (TDL):<\/strong> Individual glass panes are separated by real muntin bars.<\/p><\/li><li data-section-id=\"4oj2q3\" data-start=\"1513\" data-end=\"1616\"><p data-start=\"1515\" data-end=\"1616\"><strong data-start=\"1515\" data-end=\"1549\">Simulated Divided Light (SDL):<\/strong> Decorative muntins are attached to a single large pane of glass.<\/p><\/li><li data-section-id=\"1u8u0u\" data-start=\"1617\" data-end=\"1746\" data-is-last-node=\"\"><p data-start=\"1619\" data-end=\"1746\" data-is-last-node=\"\"><strong data-start=\"1619\" data-end=\"1651\">Grilles Between Glass (GBG):<\/strong> Grid-style muntins are placed between insulated glass panes for easy cleaning and maintenance.<\/p><\/li><\/ul><\/div><\/div><\/div><\/div><div class=\"z-0 flex min-h-[46px] justify-start\"><h2>Mullions vs Muntins: Key Differences<\/h2><p><img decoding=\"async\" class=\"aligncenter wp-image-10564\" title=\"Double window diagram showing mullions and muntins\" src=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Double-window-diagram-showing-mullions-and-muntins.webp\" alt=\"Double window diagram showing mullions and muntins\" width=\"450\" height=\"300\" srcset=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Double-window-diagram-showing-mullions-and-muntins.webp 1500w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Double-window-diagram-showing-mullions-and-muntins-500x333.webp 500w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Double-window-diagram-showing-mullions-and-muntins-1024x683.webp 1024w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Double-window-diagram-showing-mullions-and-muntins-768x512.webp 768w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Double-window-diagram-showing-mullions-and-muntins-18x12.webp 18w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p><p>Mullions and muntins are often confused because both divide <a href=\"https:\/\/aprodoor.com\/parts-of-window\/\">parts of a window<\/a>. However, they serve different purposes in window design and construction.<\/p><h3>Structural Role<\/h3><ul><li><p><strong>Mullions:<\/strong> Mullions are structural elements that separate and support multiple window units. They help stabilize large window systems and distribute weight across the frame.<\/p><\/li><li><p><strong>Muntins:<\/strong> Muntins are usually decorative bars that divide the glass within a single window into smaller sections.<\/p><\/li><\/ul><h3>Placement<\/h3><p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-10563\" title=\"Muntin grid patterns and spoke muntin window diagram\" src=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Muntin-grid-patterns-and-spoke-muntin-window-diagram.webp\" alt=\"Muntin grid patterns and spoke muntin window diagram\" width=\"450\" height=\"181\" srcset=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Muntin-grid-patterns-and-spoke-muntin-window-diagram.webp 559w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Muntin-grid-patterns-and-spoke-muntin-window-diagram-500x201.webp 500w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Muntin-grid-patterns-and-spoke-muntin-window-diagram-18x7.webp 18w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p><ul><li><p><strong>Mullions:<\/strong> Located between two or more separate window frames, connecting them together.<\/p><\/li><li><p><strong>Muntins:<\/strong> Installed within a single <a href=\"https:\/\/aprodoor.com\/what-is-a-window-sash\/\">window sash<\/a>, directly on or between the glass panes.<\/p><\/li><\/ul><h3>Size and Appearance<\/h3><p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13452\" title=\"Comparison of mullions vs muntins in window frame design\" src=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2026\/03\/Comparison-of-mullions-vs-muntins-in-window-frame-design.webp\" alt=\"Comparison of mullions vs muntins in window frame design\" width=\"450\" height=\"300\" srcset=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2026\/03\/Comparison-of-mullions-vs-muntins-in-window-frame-design.webp 1536w, https:\/\/aprodoor.com\/wp-content\/uploads\/2026\/03\/Comparison-of-mullions-vs-muntins-in-window-frame-design-500x333.webp 500w, https:\/\/aprodoor.com\/wp-content\/uploads\/2026\/03\/Comparison-of-mullions-vs-muntins-in-window-frame-design-1024x683.webp 1024w, https:\/\/aprodoor.com\/wp-content\/uploads\/2026\/03\/Comparison-of-mullions-vs-muntins-in-window-frame-design-768x512.webp 768w, https:\/\/aprodoor.com\/wp-content\/uploads\/2026\/03\/Comparison-of-mullions-vs-muntins-in-window-frame-design-18x12.webp 18w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p><ul><li><p><strong>Mullions:<\/strong> Typically thicker and more noticeable because they provide structural support.<\/p><\/li><li><p><strong>Muntins:<\/strong> Thinner grid-like bars that create decorative patterns on the glass.<\/p><\/li><\/ul><h3>Purpose<\/h3><ul><li><p><strong>Mullions:<\/strong> Used to strengthen and divide large window assemblies.<\/p><\/li><li><p><strong>Muntins:<\/strong> Used mainly to create traditional or decorative window styles.<\/p><\/li><\/ul><p>In simple terms, <strong>mullions divide entire window units, while muntins divide the glass panes within a window<\/strong>.<\/p><div class=\"text-base my-auto mx-auto [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"><div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"><div class=\"flex max-w-full flex-col gap-4 grow\"><div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+&amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"4cd6d05c-7ba2-459e-b7da-7c7447c01f38\" data-message-model-slug=\"gpt-5-3\"><div class=\"flex w-full flex-col gap-1 empty:hidden\"><div class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"><h2 data-section-id=\"oif7o9\" data-start=\"0\" data-end=\"34\">When to Use Mullions vs Muntins<\/h2><p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-10559\" title=\"Window parts labeled sill jamb mullion muntin\" src=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin.webp\" alt=\"Window parts labeled sill jamb mullion muntin\" width=\"450\" height=\"322\" srcset=\"https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin.webp 1700w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin-500x358.webp 500w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin-1024x733.webp 1024w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin-768x550.webp 768w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin-1536x1100.webp 1536w, https:\/\/aprodoor.com\/wp-content\/uploads\/2025\/11\/Window-parts-labeled--sill-jamb-mullion-muntin-18x12.webp 18w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p><p data-start=\"36\" data-end=\"220\">Choosing between <strong data-start=\"53\" data-end=\"77\">mullions and muntins<\/strong> depends on the window\u2019s purpose, structure, and design style. Each component serves a different role in modern and traditional window systems.<\/p><h3 data-section-id=\"191ejlz\" data-start=\"222\" data-end=\"248\">When Mullions Are Best<\/h3><p data-start=\"250\" data-end=\"422\">Mullions are ideal when windows need <strong data-start=\"287\" data-end=\"341\">structural strength or support for larger openings<\/strong>. They help connect multiple window units and create stable, wide window systems.<\/p><p data-start=\"424\" data-end=\"447\">Mullions work best for:<\/p><ul data-start=\"449\" data-end=\"688\"><li data-section-id=\"v62b2f\" data-start=\"449\" data-end=\"510\"><p data-start=\"451\" data-end=\"510\"><strong data-start=\"451\" data-end=\"473\">Large window walls<\/strong> that combine several window panels<\/p><\/li><li data-section-id=\"1gjaf2b\" data-start=\"511\" data-end=\"566\"><p data-start=\"513\" data-end=\"566\"><strong data-start=\"513\" data-end=\"543\">Multi-panel window systems<\/strong> used in modern homes<\/p><\/li><li data-section-id=\"1ua0bpt\" data-start=\"567\" data-end=\"618\"><p data-start=\"569\" data-end=\"618\"><strong data-start=\"569\" data-end=\"591\">Structural support<\/strong> for large glass openings<\/p><\/li><li data-section-id=\"1d34qdm\" data-start=\"619\" data-end=\"688\"><p data-start=\"621\" data-end=\"688\"><strong data-start=\"621\" data-end=\"659\">Contemporary architectural designs<\/strong> with expansive glass areas<\/p><\/li><\/ul><p data-start=\"690\" data-end=\"819\">Because mullions provide structural stability, they are commonly used in modern buildings with large windows and panoramic views.<\/p><h3 data-section-id=\"141h27m\" data-start=\"821\" data-end=\"846\">When Muntins Are Best<\/h3><p data-start=\"848\" data-end=\"1012\">Muntins are mainly used to create <strong data-start=\"882\" data-end=\"917\">decorative window grid patterns<\/strong>. They are popular in traditional architecture and homes that emphasize classic design details.<\/p><p data-start=\"1014\" data-end=\"1036\">Muntins work best for:<\/p><ul data-start=\"1038\" data-end=\"1304\"><li data-section-id=\"2xkcdz\" data-start=\"1038\" data-end=\"1099\"><p data-start=\"1040\" data-end=\"1099\"><strong data-start=\"1040\" data-end=\"1067\">Traditional home styles<\/strong> such as colonial architecture<\/p><\/li><li data-section-id=\"1rhwtqs\" data-start=\"1100\" data-end=\"1158\"><p data-start=\"1102\" data-end=\"1158\"><strong data-start=\"1102\" data-end=\"1129\">Farmhouse-style windows<\/strong> with classic grid patterns<\/p><\/li><li data-section-id=\"713mvx\" data-start=\"1159\" data-end=\"1223\"><p data-start=\"1161\" data-end=\"1223\"><strong data-start=\"1161\" data-end=\"1190\">Decorative window designs<\/strong> that divide the glass visually<\/p><\/li><li data-section-id=\"1z0yuk0\" data-start=\"1224\" data-end=\"1304\"><p data-start=\"1226\" data-end=\"1304\"><strong data-start=\"1226\" data-end=\"1255\">Historic home renovations<\/strong> where traditional window details are important<\/p><\/li><\/ul><p data-start=\"1306\" data-end=\"1446\" data-is-last-node=\"\" data-is-only-node=\"\">In many modern windows, decorative muntins are added to large glass panes to achieve a traditional look while maintaining energy efficiency.<\/p><\/div><\/div><\/div><\/div><div class=\"z-0 flex min-h-[46px] justify-start\"><h2>Need Expert Window Solutions?<\/h2><p>Understanding the difference between <strong>mullions and muntins<\/strong> can help you choose the right window design for both structure and style. Whether you are planning a new construction project or upgrading existing windows, selecting the right system makes a big difference.<\/p><p><a href=\"https:\/\/aprodoor.com\/contact\/\"><strong>Contact us today<\/strong><\/a> to explore our custom window solutions, modern glass systems, and professional support. Our team is ready to help you find the perfect windows for your home or project.<\/p><h2>FAQs<\/h2><div class=\"flex flex-col text-sm pb-25\"><article class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-(--header-height)\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"954e2b2a-46d8-4ce0-ace9-5fe36330ee00\" data-testid=\"conversation-turn-161\" data-scroll-anchor=\"false\" data-turn=\"user\"><\/article><article class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" tabindex=\"-1\" data-turn-id=\"request-699d39ed-82d0-83a0-bc80-2bbcd4ec58b4-11\" data-testid=\"conversation-turn-162\" data-scroll-anchor=\"true\" data-turn=\"assistant\"><div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"><div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"><div class=\"flex max-w-full flex-col gap-4 grow\"><div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+&amp;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"c171ca93-e912-449c-9f15-097e95899a0d\" data-message-model-slug=\"gpt-5-3\"><div class=\"flex w-full flex-col gap-1 empty:hidden\"><div class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"><h4 data-section-id=\"136rjjn\" data-start=\"0\" data-end=\"58\">What is the difference between muntins and mullions?<\/h4><p data-start=\"59\" data-end=\"311\">The main difference is what they divide. <strong data-start=\"100\" data-end=\"172\">Mullions separate entire window units and provide structural support<\/strong>, while <strong data-start=\"180\" data-end=\"270\">muntins divide the glass within a single window into smaller panes or decorative grids<\/strong>.<\/p><h4 data-section-id=\"vmn726\" data-start=\"318\" data-end=\"353\">Are mullion windows outdated?<\/h4><p data-start=\"354\" data-end=\"599\">No, mullion windows are not outdated. They are still widely used in modern architecture, especially for <strong data-start=\"458\" data-end=\"510\">large window walls and multi-panel glass systems<\/strong> that need structural support and a clean design.<\/p><h4 data-section-id=\"1lpi652\" data-start=\"606\" data-end=\"645\">What is the purpose of a mullion?<\/h4><p data-start=\"646\" data-end=\"861\">The purpose of a mullion is to <strong data-start=\"677\" data-end=\"723\">separate and support multiple window units<\/strong>. Mullions strengthen large window openings and help distribute the weight of the glass and frame.<\/p><h4 data-section-id=\"1hlfqsh\" data-start=\"868\" data-end=\"927\">What&#8217;s the difference between a mutton and a mullion?<\/h4><p data-start=\"928\" data-end=\"1112\">A <strong data-start=\"930\" data-end=\"941\">mullion<\/strong> is a structural bar between window units. <strong data-start=\"984\" data-end=\"994\">Mutton<\/strong> is actually a type of meat (from sheep). The confusion usually comes from the similar pronunciation of the two words.<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/article><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/article>\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\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Pfosten und Sprossen sind Fensterunterteilungen. Pfosten trennen ganze Fenstereinheiten, w\u00e4hrend Sprossen die Glasscheiben innerhalb eines Fensters zur Stabilisierung oder Dekoration unterteilen.<\/p>","protected":false},"author":2,"featured_media":13452,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[12],"tags":[15,157,158,27],"class_list":["post-10550","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows","tag-comparison","tag-window-mullions","tag-window-muntins","tag-window-parts"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/posts\/10550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/comments?post=10550"}],"version-history":[{"count":20,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/posts\/10550\/revisions"}],"predecessor-version":[{"id":13458,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/posts\/10550\/revisions\/13458"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/media\/13452"}],"wp:attachment":[{"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/media?parent=10550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/categories?post=10550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aprodoor.com\/de\/wp-json\/wp\/v2\/tags?post=10550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}