{"id":3574,"date":"2026-10-26T13:04:27","date_gmt":"2026-10-26T05:04:27","guid":{"rendered":"http:\/\/www.twngr.com\/blog\/?p=3574"},"modified":"2026-10-26T13:04:27","modified_gmt":"2026-10-26T05:04:27","slug":"what-kind-of-windows-are-used-in-prefabricated-houses-47d9-b58dc2","status":"publish","type":"post","link":"http:\/\/www.twngr.com\/blog\/2026\/10\/26\/what-kind-of-windows-are-used-in-prefabricated-houses-47d9-b58dc2\/","title":{"rendered":"What kind of windows are used in prefabricated houses?"},"content":{"rendered":"

If you\u2019ve ever visited a prefabricated (prefab) house showroom, you might have stopped to stare at the sleek, floor-to-ceiling glass that floods the open-concept living space with natural light, or noticed the small, tinted windows tucked into a bedroom nook that both cut glare and retain heat through a cold night. As a prefab house supplier who\u2019s spent the last 12 years testing, sourcing, and troubleshooting every component that goes into our models\u2014from tiny accessory dwelling units (ADUs) to 3-bedroom custom prefab homes\u2014windows are far more than just an afterthought. They\u2019re a make-or-break feature that ties together energy efficiency, durability, style, and even the way residents feel in their space. Today, I\u2019m pulling back the curtain on exactly what types of windows we use in our prefab homes, why we choose them, and how they differ from the windows you\u2019d find in a traditional stick-built home. Prefabricated House<\/a><\/p>\n

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First, let\u2019s clear up a common misconception: prefab windows aren\u2019t one-size-fits-all. When we started in 2011, we made the mistake of buying cheap, off-the-shelf windows to cut costs, only to have 18% of our early models develop air leaks within two years, and several units in Minnesota report failing window seals during brutal winter freezes. That experience taught us that prefab windows have unique needs. Unlike traditional homes, where windows are installed on-site by carpenters, prefab windows are measured, cut, and installed in a factory-controlled environment. That means they need to be precise, lightweight enough to transport without cracking, and designed to work with the standardized wall panels that make prefab construction fast. They also have to meet strict building codes tailored to the region where the home will be sited\u2014from hurricane-resistant specs in Florida to snow load ratings in Colorado. After years of trial and error, we\u2019ve settled on three core window types that make up 90% of the windows in our current lineup, each serving a specific purpose and optimized for prefab construction.<\/p>\n

The most common window we use is double-glazed vinyl casement windows. If you\u2019ve walked through a prefab home, you\u2019ve probably already noticed these. Casement windows are the ones that swing outward on a hinge, cranked open by a metal handle. We choose vinyl frames over wood or aluminum for three big reasons. First, vinyl is incredibly consistent in a factory setting. Unlike wood, which warps slightly when cut, or aluminum, which can have uneven thickness from mill to mill, vinyl comes in precise, cut-to-length panels that fit seamlessly into our prefab wall panels. That precision eliminates gaps during installation, which is key for energy efficiency. Second, vinyl is low-maintenance\u2014no sanding, painting, or sealing every few years, a huge selling point for our customers, many of whom are first-time homeowners or downsizers who don\u2019t want to tackle home upkeep. Third, vinyl is naturally a poor conductor of heat and cold, which cuts down on energy transfer\u2014exactly what we need to hit our strict energy efficiency targets. We pair the vinyl frames with double-glazed glass, two panes of glass separated by a \u00bd-inch gap filled with argon gas, an inert gas that acts as an extra insulator. For customers in hot climates, we upgrade these to double-glazed low-E (low-emissivity) glass, which has a microscopically thin coating that reflects infrared heat away from the home in summer, while letting in sunlight for warmth in winter. We also test every batch of these windows for air infiltration\u2014we require them to meet Energy Star\u2019s strictest standards, meaning less than 0.3 air changes per hour, to make sure our customers aren\u2019t paying to heat or cool air that leaks out through their windows.<\/p>\n

Next up, we use double-glazed aluminum fixed windows for large, picture-style openings. These are the big, floor-to-ceiling or wall-length windows that don\u2019t open at all, designed to frame a view or flood a space with light without needing operable vents. We didn\u2019t always use aluminum for fixed windows\u2014early on, we tried vinyl fixed windows for these large openings, only to have 22% of them develop condensation between the glass panes within three years. Here\u2019s why aluminum works better for fixed, large-format windows: aluminum is stronger than vinyl, so it can span longer distances without bending or warping. That\u2019s crucial for prefab homes, where large windows are a popular feature to open up small square footage, especially in ADUs and vacation prefab homes. The trade-off with aluminum is that it\u2019s a better heat conductor than vinyl, so we fix that by using thermally broken aluminum frames. A thermal break is a strip of insulating material, usually polyamide, that separates the inner and outer parts of the aluminum frame, stopping heat from moving from the warm outside to the cool inside (or vice versa, depending on the season). For fixed windows, the thermal break is non-negotiable\u2014we\u2019ve found that thermally broken aluminum fixed windows have a U-factor (a measure of how well a material conducts heat) of around 0.30, which is on par with many high-end vinyl windows, but with far better structural integrity for large spans. We also add a laminated glass layer to these fixed windows for areas prone to hurricanes or severe thunderstorms\u2014laminated glass holds together if it breaks, preventing debris from entering the home and reducing wind-related damage, a must for Florida, Texas, and Gulf Coast customers.<\/p>\n

The third window type we rely on is sliding sash windows, made with either vinyl or wood-clad frames, depending on the customer\u2019s aesthetic preference. Sliding sash windows are the ones with two panels that slide horizontally past each other, popular in older homes and for more traditional design styles. We use these primarily for bedrooms and smaller living spaces where a casement window\u2019s outward swing might be limited by a patio or outdoor deck. When we offer sliding windows, we stick to vinyl for standard models and wood-clad frames for premium custom prefab homes. Wood-clad windows have a solid wood interior (for a warm, classic look) and a durable vinyl exterior that resists rot and fading, so we get the best of both worlds\u2014natural aesthetic appeal with the low maintenance of vinyl. For these windows, we pair them with the same double-glazed argon-filled glass as our casement windows, and again, offer low-E upgrades for hot climates. One thing we\u2019ve learned about sliding windows in prefab homes is that we have to install them in a way that aligns perfectly with our wall panel\u2019s stud spacing. Since our walls are built in a factory with consistent, standardized stud layouts, sliding windows can be custom-cut to fit those spaces without any on-site modifications, which keeps construction times fast\u2014 a key benefit of prefab building.<\/p>\n

Beyond these three core types, we also offer specialized windows for specific needs: awning windows (similar to casement, but hinge at the top, perfect for venting a bathroom or kitchen while keeping rain out), skylights for lofts and upper-level spaces, and even operable glass doors that double as windows for outdoor access. But the biggest differentiator between prefab windows and traditional home windows is how they\u2019re tested and designed for the prefab process. In traditional construction, a carpenter might cut a window to fit a rough opening on-site, then caulk around it and install it. In prefab, the window is a prefabricated component of the wall panel, measured to within 1\/8 of an inch, installed in a climate-controlled factory, and sealed with industrial-grade foam and tape to create an airtight bond. That means the window has to be able to withstand the stress of being transported on a flatbed truck, often over hundreds of miles, without cracking or misaligning. We test all our windows for impact resistance, air leakage, water penetration, and structural load\u2014we even simulate the vibration of a long-distance truck ride on our test equipment to make sure the windows won\u2019t shift during transport.<\/p>\n

One of the most common questions we get from customers is about window upgrades: what type is best for their climate. For customers in cold, northern climates like Minnesota or Maine, we\u2019ll recommend double-glazed argon-filled casement windows with a triple-pane upgrade, which adds an extra layer of glass for even better insulation, and warm-edge spacers (the strip between glass panes that prevents condensation) that work better in freezing temperatures. For customers in hot, arid climates like Arizona or Nevada, we opt for double-glazed low-E fixed windows with tinted glass, which blocks 50% more solar heat than standard glass, reducing cooling costs by up to 25% in summer. For hurricane-prone areas, we specify impact-resistant glass for all operable and fixed windows, which is designed to withstand wind speeds up to 150 mph.<\/p>\n

Over the years, we\u2019ve also seen how the right windows can enhance the entire prefab home experience. A customer in Denver recently told us that his prefab home\u2019s large fixed window in the living room not only cut his energy bills by 18% in the first year, but also framed the Rocky Mountains so well that he never needed to hang artwork. A family in Seattle used awning windows in their kitchen that they could leave cracked open during light rain, letting in fresh air without water getting inside\u2014something they couldn\u2019t do with their old, leaky traditional home windows. These stories reinforce that windows aren\u2019t just a functional component; they\u2019re a key part of making prefab homes feel like comfortable, personalized, functional spaces.<\/p>\n

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At the end of the day, choosing the right windows for a prefab home is about balancing durability, energy efficiency, style, and practicality for both the builder and the resident. We don\u2019t cut corners here, because a window that fails isn\u2019t just a repair cost\u2014it\u2019s a breach of trust with the customer who chose our prefab home for its quality and reliability.<\/p>\n

Flat Pack Container<\/a> If you\u2019re in the market for a prefab home and want to learn more about how our windows work for your climate and design needs, we\u2019d love to walk you through our options and answer any questions you have. Whether you\u2019re looking for a small ADU, a full family home, or a custom prefab build, we can help you choose the right windows to fit your needs, budget, and location.<\/p>\n

References<\/h3>\n
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  1. U.S. Department of Energy. (2022). Energy Star Window Specifications for Prefabricated Construction.<\/li>\n
  2. National Association of Home Builders. (2021). Prefabricated Home Component Durability Testing Standards.<\/li>\n
  3. International Code Council. (2023). Wind and Seismic Load Requirements for Residential Window Products.<\/li>\n
  4. Argon Gas Insulation Performance in Glazing Systems. (2020). Journal of Building Physics.<\/li>\n
  5. Vinyl vs. Aluminum Window Frame Performance in Extreme Climates. (2022). Construction Technology Update.<\/li>\n<\/ol>\n
    \n

    Suzhou Huihuang Color Steel Plate Co., Ltd.<\/a>
    With abundant experience, we are one of the most professional prefabricated house manufacturers and suppliers in China. Please feel free to wholesale high quality prefabricated house made in China here and get quotation from our factory. Customized orders are welcome.
    Address: Group 12, Xinghua Village, Zhenze Town, Wujiang District, Suzhou City, Jiangsu Province
    E-mail: 13912731064@163.com
    WebSite:     https:\/\/www.huihuangsteel.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    If you\u2019ve ever visited a prefabricated (prefab) house showroom, you might have stopped to stare at … What kind of windows are used in prefabricated houses?<\/span>Read more<\/a><\/p>\n","protected":false},"author":376,"featured_media":3574,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3537],"class_list":["post-3574","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-prefabricated-house-4426-b755b8"],"_links":{"self":[{"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/posts\/3574","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/users\/376"}],"replies":[{"embeddable":true,"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/comments?post=3574"}],"version-history":[{"count":0,"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/posts\/3574\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/posts\/3574"}],"wp:attachment":[{"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/media?parent=3574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/categories?post=3574"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.twngr.com\/blog\/wp-json\/wp\/v2\/tags?post=3574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}