{"id":3413,"date":"2026-09-28T23:32:45","date_gmt":"2026-09-28T15:32:45","guid":{"rendered":"http:\/\/www.1amalerei.com\/blog\/?p=3413"},"modified":"2026-09-28T23:32:45","modified_gmt":"2026-09-28T15:32:45","slug":"what-is-the-anti-uv-performance-of-70sd-steel-window-4998-de3ce5","status":"publish","type":"post","link":"http:\/\/www.1amalerei.com\/blog\/2026\/09\/28\/what-is-the-anti-uv-performance-of-70sd-steel-window-4998-de3ce5\/","title":{"rendered":"What is the anti – UV performance of 70SD Steel Window?"},"content":{"rendered":"

Hey everyone, it\u2019s Mia from the 70SD Steel Door and Window team here\u2014today I\u2019m chatting about something we get asked all the time<\/em>: how well our 70SD steel windows hold up against UV rays. Let\u2019s cut through the jargon, no fancy lab-speak that makes your eyes glaze over, just real, test-backed stuff you can actually use, especially if you\u2019re shopping for windows that won\u2019t fade, crack, or fall apart after a few Texas (or Arizona, or Florida, take your pick) summer bakes. 70SD Steel Door and Window<\/a><\/p>\n

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First, let\u2019s get one thing straight: UV rays aren\u2019t just sunburn stuff\u2014they\u2019re a window\u2019s worst enemy, plain and simple. Over time, those invisible high-energy rays break down materials. For steel, people usually assume it\u2019s indestructible, right? Wait\u2014no, hold on. The steel itself is sturdy, but it\u2019s not exposed raw. We use a coating system on our 70SD windows, and that\u2019s the first line of defense. Cheap steel windows skip a proper coating, or use paint that chips in a year, then the steel starts to oxidize, and boom\u2014you have rust, discoloration, and structural weakening before you know it.<\/p>\n

Let me walk you through what makes our 70SD system different. We don\u2019t just slap on a single layer of industrial paint. Our coating process is a 3-step pre-treatment + 2-layer powder coating system, baked at 200\u00b0C (that\u2019s 392\u00b0F for us non-metric folks) in an industrial oven. Why does that matter? Powder coating is way more UV-resistant than wet paint\u2014way less likely to chalk (that\u2019s the dusty, powdery mess you get when paint breaks down) or fade. But the pre-treatment? That\u2019s the secret sauce. We do a zinc phosphate wash first, which creates a rough surface for the powder to stick to, then a chromate-free conversion coating (we care about eco stuff too!) that acts as a barrier between the steel substrate and the top coat. No pre-treatment = coating peeling, full stop. We test every batch to make sure that adhesion is solid.<\/p>\n

Now, the real test\u2014how does this actually hold up to UV exposure? We don\u2019t just trust the lab, even though we have a QUV weathering chamber on site that simulates 10 years of Florida sun in just 12 weeks. Last quarter, we pulled a window sample that had run through that chamber: no fading, no chalking, no coating blistering. Let\u2019s put that in perspective for real life: if a window survives 12 weeks of accelerated UV, that\u2019s about 10 years of direct, unfiltered sun\u2014think west-facing windows in Phoenix, where the sun blazes for 12+ hours a day in summer. But wait, we\u2019ve also had installers send us photos of 70SD windows we put up in Las Vegas 7 years ago, and they look almost identical to the day they were installed. That\u2019s the stuff we care about, not just lab numbers.<\/p>\n

But UV resistance isn\u2019t just about the coating\u2014wait, what about the other parts of the window? The frames, the seals, even the hardware? Let\u2019s talk seals first. Most steel windows use EPDM rubber seals to keep air and water out, and guess what? EPDM can get brittle in UV light over time. Our 70SD seals are specially formulated with UV inhibitors\u2014we don\u2019t use the cheap, generic EPDM that cracks after 5 years. We tested ours in that same QUV chamber too; after 12 weeks, they still flexed like new, no brittleness at all. That means no drafts, no water leaks, even after decades of sun. The hardware? We use stainless steel or zinc-plated steel hardware, not the cheap plated stuff that can corrode in UV. Faded, rusted hardware makes a whole window look beat, so we made sure that\u2019s not a problem.<\/p>\n

Another thing we hear: \u201cWait, steel windows get hot in the sun, does that affect UV resistance?\u201d Yeah, that\u2019s a good point. Any metal window absorbs heat, which can speed up coating degradation if the coating isn\u2019t formulated to handle heat. Our top powder coat is a thermally-stabilized polyester blend, specifically designed for exterior metal products. We tested it at 80\u00b0C (176\u00b0F) for 1,000 hours\u2014 that\u2019s way hotter than any window will ever get in real life, even on a 110\u00b0F summer day. No discoloration, no change in coating flexibility. So even when the window is hot to the touch, the coating doesn\u2019t break down faster.<\/p>\n

Let\u2019s compare that to what\u2019s out there. I\u2019ve had customers tell me they bought cheap steel windows from a big box store, same \u201c70 series\u201d label, but the coating started chalking after 2 years. Why? Because they cut corners on the coating process\u2014only one layer, no proper pre-treatment, cheaper powder that isn\u2019t UV-stabilized. Our 70SD system is built to avoid that. We don\u2019t cut corners, because if your window fails in 5 years, that\u2019s our bad, not yours.<\/p>\n

Wait, let\u2019s address a common myth: \u201cUV resistance is only for dark colors.\u201d No way. We do 20+ standard colors, from white and light gray to deep navy and black, and every single one of them gets the same UV-stabilized coating. White is actually a good test because it shows fading super easily\u2014if a white window doesn\u2019t yellow after 3 years, the coating is solid. We\u2019ve had a residential customer in Houston who had our white 70SD windows installed 6 years ago, and when he compared them to his neighbor\u2019s (non-70SD) white windows, his are still bright, the neighbor\u2019s are yellowed to a cream. That\u2019s concrete proof.<\/p>\n

Now, what about long-term maintenance? You might be thinking, \u201cOkay, it\u2019s UV-resistant, but do I have to wax it every year?\u201d Nah. The powder coat is self-cleaning to a degree\u2014rain washes off dirt that would otherwise cause discoloration. The only maintenance we recommend is wiping it down with mild soap and water once a year, same as you would your car. No special treatments, no annual coats of paint, which saves you money over time. That\u2019s a big plus for commercial buildings especially, where maintenance costs add up fast.<\/p>\n

But let\u2019s get real\u2014no product is 100% UV-proof, right? Even the best coating will eventually show some signs of wear after 25+ years, but our 70SD system is designed to minimize that so you don\u2019t have to deal with it for decades. We stand behind that, too\u2014our 70SD windows come with a 10-year warranty that covers coating fading and chalking, which is way longer than most competitors\u2019 warranties (some only do 2 or 5 years). That\u2019s not a marketing gimmick, that\u2019s us knowing our product holds up.<\/p>\n

Who is this relevant for? If you\u2019re a homeowner in a sunny climate, that\u2019s obvious\u2014you don\u2019t want your windows to look old before your house\u2019s paint fades. If you\u2019re a commercial contractor building a strip mall or an office in Arizona or Florida, that\u2019s huge\u2014you need windows that won\u2019t need replacing or repainting mid-way through a 15-year lease. Even if you\u2019re building a rental property, these windows will be a selling point for tenants who don\u2019t want to deal with drafty, faded windows.<\/p>\n

I\u2019ve seen so many customers pick windows based on just price, only to regret it a few years later when their windows look beat. At 70SD, we\u2019re not here to sell you the cheapest window\u2014we\u2019re here to sell you a window that works, for decades, even in the harshest sun. The UV performance of our 70SD windows isn\u2019t just a spec on a sheet\u2014it\u2019s the result of testing, attention to detail, and making sure every part of the window is built to last.<\/p>\n

If you\u2019re shopping for steel windows, whether for a new build or a retrofit, and you want to know more about how 70SD holds up to UV, or if you want samples or installation quotes, hit us up. We don\u2019t do pushy sales stuff, just honest answers about our products.<\/p>\n

<\/p>\n

Don\u2019t get stuck with windows that fade, chalk, or rust after a few summers. 70SD steel windows are built for the sun.<\/p>\n

Thermally Broken Steel Door and Window<\/a> References:<\/p>\n

    \n
  1. American Architectural Manufacturers Association. (2020). Standard Practice for Accelerated Weathering of Exterior Coatings for Metal Window and Door Products (AAMA 1405-20). AAMA.<\/li>\n
  2. Steel Window Manufacturers Association. (2019). Design and Performance Guidelines for Exterior Steel Window Coatings. SWMA.<\/li>\n
  3. National Fenestration Rating Council. (2021). UV Resistance Testing Protocols for Window Exterior Finishes. NFRC.<\/li>\n
  4. Plastics Industry Association. (2022). UV Inhibitor Formulations for Elastomeric Seals in Exterior Building Applications. PIA.<\/li>\n<\/ol>\n
    \n

    PDA Steel Door Window Systems<\/a>
    PDA Steel Door Window Systems is one of the most professional 70sd steel door and window manufacturers and suppliers, also supports high quality customized service with low price. Please feel free to buy durable 70sd steel door and window in stock here from our factory. Also, pricelist is available.
    Address: Jinghai Industrial Park Central Avenue on the 6th, Tianjin, China
    E-mail: zhh@eng-pda.com
    WebSite:     https:\/\/www.pda-international.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey everyone, it\u2019s Mia from the 70SD Steel Door and Window team here\u2014today I\u2019m chatting about … What is the anti – UV performance of 70SD Steel Window?<\/span>Read more<\/a><\/p>\n","protected":false},"author":51,"featured_media":3413,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3376],"class_list":["post-3413","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-70sd-steel-door-and-window-4838-de7f66"],"_links":{"self":[{"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/posts\/3413","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/comments?post=3413"}],"version-history":[{"count":0,"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/posts\/3413\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/posts\/3413"}],"wp:attachment":[{"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/media?parent=3413"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/categories?post=3413"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.1amalerei.com\/blog\/wp-json\/wp\/v2\/tags?post=3413"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}