{"id":66520,"date":"2024-09-16T14:56:00","date_gmt":"2024-09-16T12:56:00","guid":{"rendered":"https:\/\/debesto.com\/en-us\/blog\/"},"modified":"2026-02-26T22:47:29","modified_gmt":"2026-02-26T21:47:29","slug":"a-comparison-of-fiberglass-and-upvc-windows","status":"publish","type":"post","link":"https:\/\/debesto.com\/en-us\/blog\/a-comparison-of-fiberglass-and-upvc-windows\/","title":{"rendered":"A Comparison of uPVC Windows and Fiberglass Windows. What is the difference?"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1200\" height=\"350\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2024\/09\/16084222\/fiberglass-vs-upvc-1.png\" alt=\"upvc windows vs fiberglass windows comparison\" class=\"wp-image-71661\" srcset=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2024\/09\/16084222\/fiberglass-vs-upvc-1.png 1200w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2024\/09\/16084222\/fiberglass-vs-upvc-1-300x88.png 300w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2024\/09\/16084222\/fiberglass-vs-upvc-1-1024x299.png 1024w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2024\/09\/16084222\/fiberglass-vs-upvc-1-768x224.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-medium-font-size\"><strong>In this article, we&#8217;ll compare fiberglass windows from leading U.S. manufacturers, with the uPVC windows that are popular in Europe.<\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>When it comes to building energy efficiency, the choice of windows plays a crucial role. What might surprise many is that there are significant differences in window production technologies between the USA and Europe, which have a direct impact on thermal properties. <\/strong><\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Table of contents:<\/strong><\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul style=\"background-color:#f9f9f9\" class=\"wp-block-list has-background\">\n<li><a href=\"#the-production-of-fiberglass-windows\">The Production of fiberglass Windows<\/a><\/li>\n\n\n\n<li><a href=\"#comparison-with-upvc-windows\">Comparison with uPVC Windows<\/a><\/li>\n\n\n\n<li><a href=\"#american-triple-glazed-windows\">American Triple-Glazed Windows compared to European<\/a><\/li>\n\n\n\n<li><a href=\"#three-panes-for-show\">&#8220;Three Panes for Show&#8221; \u2013 Marketing Over Real Improvement<\/a><\/li>\n\n\n\n<li><a href=\"#comparison-by-parameters\">Comparison by Parameters<\/a><\/li>\n<\/ul>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"the-production-of-fiberglass-windows\">The Production of fiberglass Windows<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Fiberglass windows are made from fiberglass reinforced with various additives, creating a durable and stable material. They are based on polyester resins, which, combined with fiberglass, become <strong>extremely strong<\/strong> and <strong>resistant<\/strong> to weather conditions. The production process of fiberglass windows involves several key stages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pultrusion:<\/strong> This is a continuous molding process where glass fibers are saturated with resin and then passed through a heated die, where the material takes shape. This process produces profiles with very high strength and stability.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Finishing:<\/strong> After molding, the profiles are cut to the appropriate sizes and undergo additional processes, such as painting or surface finishing, which ensure resistance to fading and mechanical damage.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Window Assembly:<\/strong> The finished profiles are joined and assembled with glass to create a complete product. The fiberglass frames are lightweight but very durable, eliminating the need for additional steel reinforcements inside the frame.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:5%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer uag-hide-desktop uag-hide-tab\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104423\/Fiberglass-window.png\" alt=\"fiberglass window from us\" class=\"wp-image-66890\" srcset=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104423\/Fiberglass-window.png 750w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104423\/Fiberglass-window-300x300.png 300w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104423\/Fiberglass-window-150x150.png 150w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns full-width-section has-background is-layout-flex wp-container-core-columns-is-layout-3 wp-block-columns-is-layout-flex\" style=\"background-color:#f9f9f9\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-2 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-center\" style=\"font-size:26px\"><strong>Unsure which system delivers the best ROI for your project?<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center\">Stop guessing: US builders <strong>cut costs by 50% <\/strong>by choosing European systems. <br><strong>Minimize import risks<\/strong>: we manage logistics, technical advice, and manufacturer responsibility.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><br><strong>See dedicated offer for:<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-1 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-font-size is-style-outline is-style-outline--1\" style=\"font-size:16px\"><a class=\"wp-block-button__link has-black-color has-white-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/debesto.com\/en-us\/b2b-offer\/spec-house-developers\/\" style=\"border-radius:0px\">Spec Home Builders<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-font-size is-style-outline is-style-outline--2\" style=\"font-size:16px\"><a class=\"wp-block-button__link has-black-color has-white-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/debesto.com\/en-us\/b2b-offer\/\" style=\"border-radius:0px\">Others<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"comparison-with-upvc-windows\">Comparison with European uPVC Windows<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>In Europe, uPVC (unplasticized polyvinyl chloride) is a very popular material for window production. The production process of these windows differs from that of fiberglass windows and includes the following stages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Extrusion:<\/strong> Similar to pultrusion, in extrusion, PVC is formed into profiles. However, unlike fiberglass, PVC is not as strong on its own. Therefore, uPVC frames are often reinforced with internal steel elements, which increase their rigidity and strength.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Insulating Chambers:<\/strong> uPVC profiles are designed with multiple internal air chambers, which increase the window&#8217;s thermal and acoustic insulation. The space between panes is filled with an inert gas \u2013 usually argon or rarely krypton \u2013 which is a better insulator than air.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Assembly:<\/strong> As with fiberglass windows, the profiles are joined and assembled with glass and hardware to create a complete product. The internal steel reinforcements provide structural stability, which is crucial for larger windows.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:5%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer uag-hide-desktop uag-hide-tab\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104444\/uPVC-window.png\" alt=\"uPVC window from eu\" class=\"wp-image-66891\" srcset=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104444\/uPVC-window.png 750w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104444\/uPVC-window-300x300.png 300w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11104444\/uPVC-window-150x150.png 150w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-5 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"american-triple-glazed-windows\">American Triple-Glazed Windows compared to European<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>When we <strong>think of triple-glazed windows<\/strong>, we naturally expect them to offer significantly improved <strong>thermal insulation<\/strong>. However, not all triple-glazed systems are created equal. In the USA, manufacturers often use very narrow spaces between the panes in their triple-glazed windows.<\/p>\n\n\n\n<p>For example, Marvin&#8217;s Signature Series Ultimate windows have only 1\/4\u201d (about 6 mm) or 5\/16\u201d (about 8 mm) of space between the panes, resulting in a total glass thickness of just 7\/8&#8243; or 1&#8243; (22 mm or 25 mm).<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why is this a problem?<\/strong> <\/h3>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>In Europe, where energy standards are much stricter, triple-glazed windows typically have <strong>much wider spaces<\/strong> between the panes \u2013 usually 11\/16&#8243; (18 mm). These wider spaces allow for <strong>better thermal insulation<\/strong> because they reduce <strong>convection<\/strong> (heat flow) between the panes. Narrow glass packages, like those used in the USA, <strong>do not significantly improve<\/strong> thermal insulation compared to double-glazed windows. <\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:5%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer uag-hide-desktop uag-hide-tab\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11110258\/distance-between-panes.png\" alt=\"comparison of the distance between panes in eu windows and us windows\" class=\"wp-image-66898\" style=\"object-fit:cover\" srcset=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11110258\/distance-between-panes.png 750w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11110258\/distance-between-panes-300x300.png 300w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11110258\/distance-between-panes-150x150.png 150w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">When is the distance optimal?<\/h3>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>A distance below 15\/32&#8243; (12 mm) does not provide sufficient insulation, as heat transfer through convection and conduction is higher.<\/p>\n\n\n\n<p>A larger gap Above 23\/32&#8243; (18 mm) can lead to convection currents forming in the gas between the panes, which can reduce the insulating properties.<\/p>\n\n\n\n<p>Additionally, filling the space between the panes with gases like argon or krypton further improves the thermal insulation of the windows. These gases have lower thermal conductivity than air, resulting in better thermal performance, especially when combined with the optimal distance between panes.<\/p>\n\n\n\n<p>Total glass thickness of European-made windows is 48 mm (almost 2&#8243;), which is almost <strong>twice <\/strong>wider than in American-made windows.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-6 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\" id=\"three-panes-for-show\">&#8220;Three Panes for Show&#8221; \u2013 Marketing Over Real Improvement<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Some US manufacturers often introduce triple-glazed packages just to be able to say they offer triple-glazed windows, similar to their European competitors. However, from a physics and real energy efficiency standpoint, such solutions <strong>make little sense<\/strong>. In reality, adding a third pane with such a narrow gap is more of a <strong>marketing tactic<\/strong> than a technological improvement.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">What Does European Technology Offer?<\/h3>\n\n\n\n<p>In Europe, the standard is to use wide spaces between the panes 11\/16&#8243; (18 mm) and modern low-emissivity (low-e) coatings, which significantly reduce the <strong>U-value<\/strong> (thermal transmittance). These types of solutions not only meet stringent energy standards but also genuinely improve indoor thermal comfort, reducing heating and cooling costs.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"rat rat__outline\">\n    <p class=\"rat__header\">Would you like to have better knowledge about using European windows in American projects?<\/p>\n    <p class=\"rat__content\"><p>Read our article about <a href=\"https:\/\/debesto.com\/en-us\/blog\/american-vs-european-what-are-the-differences\/\">differences between American and European windows<\/a>.<\/p>\n<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:5%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer uag-hide-desktop uag-hide-tab\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11132719\/fiberglass-and-upvc-comparison.png\" alt=\"fiberglass and upvc windows comparison table\" class=\"wp-image-66916\" srcset=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11132719\/fiberglass-and-upvc-comparison.png 750w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11132719\/fiberglass-and-upvc-comparison-300x300.png 300w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2023\/08\/11132719\/fiberglass-and-upvc-comparison-150x150.png 150w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"comparison-by-parameters\">uPVC vs. fiberglass: window comparison by key parameters<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Durability:<\/strong> Fiberglass windows are very resistant to weather and mechanical factors, eliminating the need for additional reinforcements, making them lighter but just as durable as uPVC windows.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Insulation:<\/strong> uPVC windows often outperform fiberglass windows in terms of thermal insulation, thanks to the use of insulating chambers. In the case of fiberglass windows, additional low-e coatings and other technologies may be necessary to improve insulation.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong> Longevity and Maintenance:<\/strong> Fiberglass is a material resistant to corrosion, fading, and mechanical damage, meaning these windows require minimal maintenance. uPVC windows are also resistant to corrosion but may require more attention when it comes to cleaning and maintaining seals and reinforcements.<\/li>\n<\/ul>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<article class=\"post post--tile\">\n  <div class=\"post__image\">\n    <figure class=\"\">\n      <img decoding=\"async\" class=\"\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/2024\/05\/06090319\/upvc-windows-rehau-artevo-visualization-1.jpg\" alt=\"modern building with upvc rehau artevo windows and doors\"\/>\n    <\/figure>\n  <\/div>\n  <div class=\"post__content\">\n    <h2><a href=\"https:\/\/debesto.com\/en-us\/quick-contact-form\/\" title=\"Book a project consultation\">Which windows should you choose: uPVC or fiberglass?<\/a><\/h2>\n        <p>Our goal is to solve your problems and find best possible solution for your project. If only you have a window project, contact us immediately!<\/p>\n        <a href=\"https:\/\/debesto.com\/en-us\/quick-contact-form\/\" class=\"btn btn--fill\" title=\"Book a project consultation\"><span>Book a project consultation<\/span><\/a>\n  <\/div>\n<\/article>\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Choosing between fiberglass and uPVC windows depends on many factors, such as thermal insulation requirements, aesthetics, durability, and budget. Fiberglass windows offer modern technological solutions that are lightweight and very durable. If your concern is mostly about meeting minimal thermal requirements, American windows should be a sufficient solution.<\/p>\n\n\n\n<p>European uPVC windows offer excellent thermal insulation thanks to the use of much more optimal air chambers. The fact, that comparing to US windows, European ones are ~<strong>40% cheaper<\/strong> is also worth mentioning. You may find exact prices on our <a href=\"https:\/\/debesto.com\/en-us\/windows\/pvc-windows\/\">pricing list<\/a>.<\/p>\n\n\n\n<p>If you care about real thermal performance, additionally increasing profitability of your project, you should definitely consider importing uPVC windows from Europe. It&#8217;s worth <strong>carefully considering<\/strong> these differences when selecting the right windows for your project.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Still unsure? Consider a third option<\/h3>\n\n\n\n<p>Aluminum windows offer high durability, slim profiles, and modern aesthetics \u2014 often used in high-end projects where both design and lifespan matter. When importing from Europe, you can save up 50%.<\/p>\n\n\n\n<p>Explore our <a href=\"https:\/\/debesto.com\/en-us\/reviews\/best-aluminum-windows\/\">ranking of the best aluminum windows <\/a>that help you increase project value without overspending.<\/p>\n\n\n\n<p>Gain deeper insights with the<a href=\"https:\/\/debesto.com\/en-us\/blog\/aluminum-vs-aluminum-clad-windows\/\"> aluminum vs. aluminum-clad window comparison<\/a><\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns full-width-section is-layout-flex wp-container-core-columns-is-layout-8 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column has-white-background-color has-background is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-c42f7767aac6b8f711d65cc7bed60f6d\" style=\"font-size:28px\"><span style=\"color: #c92116\"><strong>European Windows<\/strong><\/span><strong> for Spec Home Builders<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Save up to 50% &#8211; Direct from Poland<\/li>\n\n\n\n<li>On-site Delivery &#8211; Seamless Import<\/li>\n\n\n\n<li>Installation Support Included<\/li>\n<\/ul>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Check dedicated offer for<\/strong>:<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-font-size is-style-outline is-style-outline--3\" style=\"font-size:16px\"><a class=\"wp-block-button__link has-black-color has-white-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/debesto.com\/en-us\/b2b-offer\/spec-house-developers\/\" style=\"border-radius:0px\">Spec Home Builders<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-font-size is-style-outline is-style-outline--4\" style=\"font-size:16px\"><a class=\"wp-block-button__link has-black-color has-white-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/debesto.com\/en-us\/b2b-offer\/\" style=\"border-radius:0px\">Other customers<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:70%\">\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer uag-hide-mob\"><\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer uag-hide-desktop uag-hide-tab\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"423\" src=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2025\/09\/24112144\/luxury-home-european-windows-offer-1024x423.jpg\" alt=\"\" class=\"wp-image-77017\" srcset=\"https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2025\/09\/24112144\/luxury-home-european-windows-offer-1024x423.jpg 1024w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2025\/09\/24112144\/luxury-home-european-windows-offer-300x124.jpg 300w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2025\/09\/24112144\/luxury-home-european-windows-offer-768x318.jpg 768w, https:\/\/cdn.debesto.com\/web\/assets\/sites\/7\/2025\/09\/24112144\/luxury-home-european-windows-offer.jpg 1161w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Discover how European uPVC windows compete to American fiberglass windows. 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