Why Polyurethane Sandwich Panel is a Good Roofing Material
Why Polyurethane Sandwich Panel is a Good Roofing Material
The roof plays a vital role in both residential and commercial structures as it acts as the first line of defense against external threats and risks. Roofs have been known to exist since man realized the importance of having a shelter to protect them from the elements. Cavemen used earth and vegetation as roofs. Though they were excellent protection from heat and cold, these natural roofing materials could not keep them safe from animals and would easily break due to rains. Over time, man would use different materials as roofing. The Chinese used clay 5,000 years ago. In the 12th Century, Europeans used wood shingles as roofs. Today, roofs are made of different materials like concrete and metal. These transitions were often dictated by man’s desire to come up with the best materials for the protection over their head. And now, thanks to modern technology, more materials or a combination of different materials are being used as roofs. An example is a roof made of Polyurethane Sandwich Panel. But what exactly is it?
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Polyurethane may be unfamiliar to you, but it is used in common things around you, like your appliances, cars, shoes, and beds. Polyurethane is a synthetic plastic material with a wide range of uses. Perhaps one of the most familiar items made of this is the flexible foam used in mattresses. It is also used in shoe soles, tires, and as cushioning for furniture.
Polyurethane is popular for the many benefits it offers flexibility, high load capacity, strong bonding ability, range of hardness, and economical manufacturing process. It is also known for its resistance to abrasion and tear as well as water, oil and grease, mold, mildew, and fungus. Because of these qualities, it is widely used in different consumer and industrial products that make our lives comfortable. In construction, it can be used as roofing, particularly as Polyurethane Sandwich Panel.
Polyurethane Sandwich Panel or PU Panel is a structure made of polyurethane foam “sandwiched” between two side skins made of another material such as metal. The foam in between provides thermal insulation. The combination of the materials offers benefits such as its lightweight, durability, and resistance to corrosion and weather elements. All these benefits make the Polyurethane Sandwich Panel ideal for roofing.
Union Galvasteel is a roofing manufacturer in the Philippines that offer a wide array of products, including PU Panel roofing or what we call insulated panels. Under our Duratherm brand, we have Roofing PU Panel and Standard PU Panel. These panels consist of a rigid foam insulation layer sandwiched between two structural metal skin surfaces. The core consists of Polyurethane and Polyisocyanurate insulated panels that form a strong bond to the outer skin, creating a durable panel.
Our PU panels are structurally superior to traditional wood framing as they are stronger and less susceptible to shifting. They are extremely durable, which is important in roofing as roofs are expected to protect a structure and the people inside it from external threats such as bad weather. Though lightweight, it is important to note that PU panels can be as strong as a rock, making them a Well-Recommended Roofing Material for homes or commercial structures.
Aside from durability, PU panel roofing provides other great advantages. First, installation is hassle-free. It requires less time and less manpower install. Second, it is flame-retardant. Its efficient thermal insulation keeps the roof from absorbing too much heat. Third, it is economical. Factoring in the first two advantages mentioned, PU panels can save you money as they are easy to install, while it being flame-retardant means less consumption of electricity. Last but not least, it is eco-friendly. All the materials use in a PU panel are recyclable.
Our insulated panels are also pre-painted in different colors – red, blue, brown, white, beige, and green. Our white variant is USDA approved coating with a Solar Reflectance Index (SRI). Surely, you will find a color that suits your structure’s aesthetics or your personal choice.
Our PU Panels are not only for roofs. They are also ideal for walls, partitions, and ceiling of building structures. Because of the thermal insulation they provide, they are also great for cold storage for food, commercial chillers, pharmaceutical products storage, and controlled-temperature rooms.
Now that you know about Polyurethane Sandwich Panel, you may be looking for a reliable manufacturer of insulated panels, so you upgrade your roof.
Union Galvasteel is the market leader in the manufacturing and distribution of pre-painted and other galvanized roofing as well as insulated panels for commercial, industrial, and residential use. We have the largest and most diversified distribution network in the industry, with roll forming plants, warehouses, and sales offices in strategic locations throughout the country. We ensure that we create only the best by hiring the top talent, adhering to operational excellence, and ensuring that our technology is top-notch. We are relentless in exploring proactive ways towards improvement, which sets us apart from the rest in the field.
Get in touch with us via our website or call these numbers for assistance: (02) -; -; (049) 545- to 86 or (Globe) and (Smart).
PU Roof Sandwich Panels: 7 Proven Benefits for Smarter, Greener ...
In today’s competitive construction industry, choosing the right roofing solution can make or break a project’s success. Whether you’re an architect designing a sustainable building, a contractor on a tight deadline, or a homeowner seeking modern, efficient materials, PU (polyurethane) roof sandwich panels offer a transformative solution. Manufactured using advanced technology, these panels are a benchmark in energy efficiency, structural integrity, and environmental performance.
At MAXON STEEL Henan province, China. we manufacture PU roof sandwich panels that exceed industry standards while meeting modern building demands. Below, we explore the top features, technical insights, and sustainable advantages of these innovative panels
Table of Contents
1. Thermal Performance: Reduce Energy Consumption Year-Round
PU roof sandwich panels are known for their exceptional thermal insulation. The closed-cell structure of polyurethane foam offers low thermal conductivity (≤ 0.024 W/m·K), significantly reducing heat transfer through the roof. This keeps interiors cooler in summer and warmer in winter without over-reliance on HVAC systems.
Key Metrics:
- Average energy savings: up to 40%
- Thermal conductivity: ≤ 0.024 W/m·K
- Insulation rating: Consistent across panel thicknesses of 45mm to 95mm for roofs
Case Study: A logistics warehouse in Jiangsu cut cooling costs by 38% after switching to our PU roof panels compared to traditional corrugated metal roofing.
2. Structural Strength & Load Bearing Capacity
PU sandwich panels are not just lightweight—they’re engineered for strength. With an insulated core bonded between two metal sheets, typically pre-painted galvanized or Galvalume steel, these panels resist bending and compressive forces.
PU Roof Sandwich Panel Build-Up:
- Top sheet: High-grade aluminum, often pre-coated for enhanced durability and aesthetics, Provides a strong, weather-resistant outer surface that protects against environmental factors like rain, wind, and UV radiation. It also adds to the aluminum pu roof sandwich panel’s structural integrity and visual appeal.
- Core: Rigid PU foam, known for its high thermal resistance and lightweight properties, acts as the primary insulation layer, offering excellent thermal performance by reducing heat transfer. This core helps in maintaining consistent indoor temperatures and contributes to energy efficiency
- Bottom sheet: Similar high-grade aluminum as the outer layer, often with protective coatings, serves as the internal facing of the panel, providing additional structural support and maintaining the roof’s integrity from the underside.
Applications: Suitable for heavy snow zones, industrial plants with rooftop installations, and modular construction requiring structural performance.
3. Weather and Moisture Resistance
PU roof panels offer outstanding protection against external elements. They resist rainwater penetration, UV radiation, strong winds, and extreme temperature shifts. Sealed joints and tongue-and-groove connections add an extra layer of water proofing and air-tightness.
Durability Ratings:
- Wind uplift resistance: Up to 2.5 kPa
- Water absorption: < 2%
- Operating temperature: -40°C to 85°C
Example: A coastal manufacturing facility in Fujian replaced old tile roofing with PU sandwich panels to address persistent leaks and now reports zero water intrusion during typhoons.
4. Fire Safety Compliance
Safety is a top priority in any building envelope system. Our PU panels meet Class B1/B2 fire ratings (as per GB-), offering flame-retardant performance. The closed-cell foam slows down flame spread and maintains panel structure under elevated temperatures.
Fire Performance:
Additional resources:Flexible Metal Hose (High Temperature) for Air Compressors or ...
- Flame spread index: < 75
- Smoke development: < 450
- Compliant with ISO, CE, and local Chinese fire codes
Tile - The Home Depot
Pro Tip: For high-risk industrial zones, specify panels with rock wool cores or hybrid PU+PIR systems for enhanced fire ratings.
5. Recyclable Materials: Closing the Loop on Waste
Key Insight: Circular economy principles are at the core of PU insulated roof panels.
Metal Surfaces: Most metal roof panels use Galvalume steel or aluminum, both containing 25–30% recycled content. These metals are 100% recyclable without degradation.
Contact us to discuss your requirements of PU Sandwich Roof Panel. Our experienced sales team can help you identify the options that best suit your needs.
PU Foam Cores: Once considered difficult to recycle, polyurethane is now recovered using chemical recycling (glycolysis, hydrolysis). This makes it possible to reuse PU foam in new panels or automotive applications.
Case Study: A European partner repurposed 85% of retired PU panels into insulation for electric vehicle battery packs.
Actionable Tip: Always request Environmental Product Declarations (EPDs) to verify recyclability and sustainability claims.
6. Speedy Installation with Long-Term Savings
PU sandwich panels reduce overall construction time. Their lightweight nature means fewer lifting tools are needed, while modular design simplifies alignment and fastening.
Time-Saving Benefits:
- Install rate: 60–90 m²/hour with a skilled team
- Reduced labor: One-third the effort of laying traditional roofing layers
- Minimal scaffolding needed
ROI Insight: Lower labor costs and faster build times mean savings of up to 20% in total construction budgets.
7. Visual Design Flexibility
Modern buildings demand performance and appearance. PU roof panels come in various finishes, colors, and profiles, ensuring compatibility with contemporary and classic architectural styles alike.
Customization Options:
- Colors: RAL & custom
- Surface textures: Smooth, embossed, matte, high-gloss
- Profiles: Standing seam, ribbed, flat-lock
Whether you’re cladding a commercial factory or a boutique showroom, aesthetic flexibility ensures the design doesn’t compromise performance.
Technical Specifications at a Glance
Where PU Roof Panels Make the Difference
Industrial Warehouses: High-insulation reduces energy costs for HVAC-reliant facilities. Residential Projects: PU Roof Sandwich Panels bring luxury aesthetics and comfort to modern housing. Modular Construction: Their light weight and prefab compatibility speed up timelines. Cold Storage Units: Thermal stability is critical for frozen food logistics. Agricultural Buildings: Resistance to pests and humidity suits farm storage.
Sustainability at the Core of Our Manufacturing
At MAXON STEEL, sustainability isn’t an afterthought—it’s embedded in every panel we produce. From reducing CO2 emissions during steel procurement to recycling PU foam waste, we are committed to greener construction.
Key Initiatives:
- Sourcing local steel to reduce transport emissions
- Minimizing production waste through closed-loop systems
- Partnering with recyclers to recover end-of-life materials
Certifications:
- ISO Environmental Management
- Green Building Rating Compliance (LEED equivalent in China)
Real-World Case Studies
Smart Logistics Center, Shanghai
A cold chain logistics hub required roofing with strict thermal performance and fire resistance. PU panels were installed across 12,000m² in under three weeks, achieving energy savings of 42%.
High-End Villa Project, Hangzhou
Luxury homes needed sleek design and insulation in one solution. PU Roof Sandwich Panels in matte gray and woodgrain finish offered modern aesthetics without sacrificing performance.
Visit Our Wuxi Showroom
Experience our PU sandwich panels up close. See the textures, touch the surfaces, and consult with our expert team to find the right solution for your project.
Address: Industrial zone of Gushi county, Henan province, China
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Website: www.indpanel.com
Download Our Latest Product Catalog
From PU roof panels to decorative wall solutions, our catalog includes technical details, real-world photos, and design inspiration. Click below to download.
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Final Thoughts: Building Tomorrow with Today’s Smart Materials
In the face of climate challenges, rising material costs, and stricter building regulations, PU roof sandwich panels offer a future-ready solution. They reduce energy consumption, speed up construction, enhance safety, and help close the loop on material waste.
When you choose MAXON STEEL’s PU panels, you’re not just choosing insulation or metal. You’re choosing performance, responsibility, and a smarter way to build.
Ready to take your project to the next level? Contact us or visit our showroom in Wuxi. Let’s create something durable, efficient, and beautiful together.
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