If you’ve ever walked through a modern warehouse, driven past a sleek retail strip mall, or stepped into an energy-efficient cold storage facility, you’ve likely encountered XPS (Extruded Polystyrene) sandwich panels without even noticing. These panels are the unsung workhorses of the construction world, balancing lightweight strength, superior insulation, and durability to keep buildings comfortable, safe, and cost-effective over decades. As a supplier who’s worked with architects, general contractors, and DIY project managers for nearly 12 years, one of the most common questions I get—often from new clients who’re still mapping out their build—is, “What sizes are XPS sandwich panels available in?” XPS Sandwich Panel
It’s a fair question, too. The right panel size isn’t just a matter of fitting space; it impacts installation time, material waste, structural load, and even energy efficiency down the line. I’ve seen a contractor show up to a job site with 100 panels that were too long to fit the ceiling joists, and another who ordered panels too thin to meet local wind load codes—both costly mistakes that eat into budgets and delay project timelines. That’s why I make it a point to walk every client through size specifics before they even place an order, no matter how big or small their project is.
Let’s start with the core of what defines XPS sandwich panel size: it isn’t just one number. Panels are built from three distinct layers— the rigid XPS foam core at the center, sandwiched between two outer facings (usually steel, aluminum, or sometimes PVC for specialized projects)—and each layer contributes to the final dimensions that matter most to builders. We categorize sizes into three key measurements that you’ll see referenced in our specs: length, width, and thickness. Each is tailored to a specific use case, so let’s break them down clearly, no jargon included.
First, thickness. This is the non-negotiable measurement that drives insulation performance, and it’s the first thing we discuss with clients because it directly ties to local building codes. XPS core thickness is the backbone of the panel’s R-value (the measure of thermal resistance)—the higher the R-value, the better the insulation. For context, standard thicknesses range from 20mm (0.79 inches) all the way up to 200mm (7.87 inches), with custom thicknesses available for specialized requests.
Let’s make that concrete with real-world examples. For interior partitions in residential or light commercial spaces, where insulation needs are lower and space is tight, most clients opt for 20mm to 50mm (0.79 to 1.97 inches) thick panels. A 20mm panel works great for dividing a home office from a bedroom, while a 50mm panel adds enough sound dampening for a small retail back office or a closet for temperature-sensitive items. For residential exterior walls, where energy codes require consistent thermal resistance across seasons, 80mm to 120mm (3.15 to 4.72 inches) is standard. In my 2022 experience working with a general contractor in Ohio on a 4,000-square-foot custom home, they went with 100mm panels to meet Ohio’s 2021 building code requirements, which mandate R-30 for exterior walls. That 100mm XPS core gives an R-value of roughly R-5 per inch, so that’s a perfect R-50, which exceeded their needs and helped them cut their projected annual heating bills by 12%.
For cold storage facilities, that number jumps dramatically. A client of mine in upstate New York runs a frozen food warehouse, and last year they needed panels for their freezer rooms that stay at -18°C (0°F). We supplied them 150mm (5.9 inches) panels for the walls and 200mm (7.87 inches) for the ceiling. The thicker core prevents thermal bridging (the gaps where heat transfers through the structure) that would cause ice buildup on walls and raise energy costs for running their refrigeration units. It’s worth noting that while most manufacturers stick to these standard thickness increments, we can produce custom thicknesses, like 130mm or 175mm, for projects with unusual insulation needs, as long as the order volume meets our minimum production runs—usually 500 square meters, which is flexible enough for most small to mid-sized projects.
Next, width. This is the measurement of how wide the panel is when laid flat, and it’s all about installation efficiency. Wider panels mean fewer seams, less time spent cutting and fitting, and fewer points where air can leak through—another win for energy efficiency. Standard panel widths for XPS sandwich panels fall into two main categories, tailored to the type of outer facing. For metal-faced panels (the most popular choice for commercial and industrial projects), standard widths are 950mm (37.4 inches) and 1180mm (46.5 inches). These are industry standards for a reason: they work seamlessly with standard metal framing spacing, which is usually 1200mm (47.2 inches) on center. A 950mm panel leaves a small gap at each edge that’s easily sealed with caulk or trim, while 1180mm panels can span almost the entire framing width with minimal adjustment. For smaller residential projects or retrofits, we also offer a narrower 600mm (23.6 inches) width, which is easier to maneuver through doorways and around tight spaces—something a homeowner doing a garage conversion will really appreciate.
For projects with non-metal facings, like PVC for outdoor signage or specialized food-grade coatings for food processing facilities, widths are slightly more flexible. We can cut panels to any width between 500mm (19.7 inches) and 1500mm (59 inches) as standard, and wider widths up to 2000mm (78.7 inches) for custom orders. I’ll never forget a project we did a few years ago for a craft brewery in Portland, Oregon. They needed panels for their tasting room’s accent wall, which had irregular cutouts for windows and exposed ceiling beams. Using our 600mm width panels, their installation team was able to cut each panel to fit the exact shape of the wall, reducing waste by 18% compared to if they’d used the standard 1180mm width. That waste reduction saved them nearly $2,000 in material costs alone—proof that choosing the right width isn’t just about fitting the frame, it’s about fitting the project.
Now the measurement that trips up the most people: length. Unlike thickness and width, which are standardized for production and compatibility, panel length is almost always custom-cut to a project’s exact needs. That’s because a panel is only as good as how it fits the space it’s being installed in—no one wants to see a panel cut down 10 times along its length just to reach from the floor to the ceiling. At our facility, we can cut XPS sandwich panels to any length between 1 meter (3.28 feet) and 18 meters (59 feet). For most residential projects, that translates to lengths between 2.4 meters (8 feet) and 4.8 meters (16 feet)—standard for ceiling joists and wall stud spacing in North America. For commercial and industrial projects, we regularly supply panels up to 12 meters (39 feet) long for warehouse walls and roof sections, which cuts installation time drastically because workers don’t have to join multiple panels end-to-end.
I want to be clear: there are a few important caveats to length. First, longer panels require proper handling during shipping and installation. A 15-meter panel can’t be loaded onto a standard delivery truck without special strapping and careful driving, and it needs multiple workers to lift it onto a roof or wall. I always warn clients about this up front, because the last thing anyone wants is a panel getting damaged on delivery because they didn’t plan for the size. Second, while custom length is our standard offering, we do have a small selection of stock panels in 3-meter (9.8 feet) and 6-meter (19.7 feet) lengths for clients who need materials quickly—great for last-minute repairs or small add-ons.
Beyond these three core dimensions, there are a few other size-related factors that clients rarely think about, but make a huge difference. The first is edge profile. Most XPS sandwich panels come with tongue-and-groove edges that lock together seamlessly during installation, creating a tight, airtight seal. The size of that tongue and groove is standardized to 10mm (0.39 inches) for most panels, but we can adjust it for custom projects that need a different seal, like extreme-cold storage or coastal areas with high wind loads. The second factor is structural load capacity. While not a “size” in the traditional sense, a panel’s size (especially length and thickness) directly impacts how much weight it can support. A 50mm thick panel can support up to 100 kg per square meter when used as a wall, while a 150mm panel can support up to 500 kg per square meter when used as a roof panel. That’s why I always ask clients about the load requirements of their project, not just the dimensions—we once had a client who ordered thick panels for a roof that was only going to support a small HVAC unit, costing them an extra $3,000 in material they didn’t need.
I also want to address a common myth I hear all the time: that XPS sandwich panels only come in “one-size-fits-all” measurements. Nothing could be further from the truth. Over the years, we’ve supplied panels to projects as small as a 100-square-foot backyard shed (using 20mm thick, 600mm wide, 2-meter long panels) and as large as a 100,000-square-foot agricultural warehouse (using 120mm thick, 1180mm wide, 10-meter long panels). We’ve even created custom panels for a mobile ice cream truck, where the curved roof required panels cut to a non-linear shape—something I didn’t think was possible until the owner sent us a diagram and we tested a prototype.
At the end of the day, the right XPS sandwich panel size depends on three things: your project’s insulation needs, the space you’re fitting the panels into, and your installation timeline. I’ve had clients come to me thinking they need the thickest, widest panels on the market, only to find out a thinner, narrower panel will work just as well and save them thousands of dollars. The key is to ask the right questions early on, so you don’t overspend or run into delays.
If you’re planning a project and want to know more about the sizes available, or need help figuring out which dimensions are right for your build, don’t hesitate to reach out. Our team has worked on everything from residential garages to industrial refrigeration facilities, and we’re happy to provide free, no-obligation specs and recommendations tailored to your needs. You can connect with our team directly to discuss your requirements, whether you need stock panels for a quick repair or a custom order for a large-scale build.
XPS Foam References:
- American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). (2021). Thermal Insulation Handbook for Building and Construction.
- Extruded Polystyrene Foam Association (XPFA). (2020). XPS Sandwich Panel Specifications and Installation Guidelines.
- International Code Council (ICC). (2022). International Energy Conservation Code (IECC) for Commercial and Residential Buildings.
- National Association of Home Builders (NAHB). (2021). Guide to Prefabricated Building Materials for Residential Construction.
Zhejiang Kurtin New Material Tech Co., Ltd.
As one of the most experienced XPS sandwich panel manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please rest assured to wholesale bulk XPS sandwich panel made in China here from our factory. We also accept customized orders.
Address: 8th Floor, Unit 1, Building 3, Zhi Di Mansion, Xiaoshan District, Hangzhou City, Zhejiang Province, P.R. CHINA
E-mail: Jeff.jin@kurtin.cn
WebSite: https://www.insulationpanel.net/
