Construction Materials, Building Supplies, Construction Industry,
Advantages of metal panel curtain wall composite panels
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Metal curtain wall sandwich panels are transforming modern architecture by combining style, durability, and advanced functionality. These panels feature a decorative metal surface layer, supported by a structural system that connects to a building’s framework. They incorporate essential functions like fire resistance, lightning protection, thermal insulation, soundproofing, ventilation, and shading, making them a top choice for innovative construction projects worldwide.

 

Product Characteristics

Applications of Metal Curtain Wall Sandwich Panels (1)

- Distinctive Texture and Color Options: Metal curtain wall sandwich panels boast a unique texture with vibrant, long-lasting colors. Their diverse shapes enable creative designs that blend effortlessly with glass or stone curtain walls.

- Lightweight Construction: These panels reduce structural loads, offering an excellent solution for high-rise buildings while maintaining strength and stability.

- Superior Resistance: With outstanding fireproof, waterproof, stain-resistant, and anti-corrosion properties, they ensure a building’s exterior stays pristine for years.

- Design Flexibility: High plasticity allows them to be shaped into flat surfaces, curves, or spheres, providing architects with limitless possibilities.

- Cost-Effective Durability: They deliver a high performance-to-price ratio, with a long lifespan and minimal upkeep requirements.

 

Applications of Metal Curtain Wall Sandwich Panels (2)

Product Advantages

- Simplified Installation and Maintenance: The panels’ modular design streamlines processing, transportation, installation, and cleaning. Individual sections can be removed for repairs, enhancing practicality.

- Energy Efficiency: Excellent thermal insulation reduces energy costs, supporting sustainable building practices.

- Visual Appeal: Their sleek, modern aesthetic enhances the look of commercial and residential structures alike.

- Versatility: Compatibility with various architectural styles and materials makes them highly adaptable to diverse project needs.

- Long-Term Value: Combining durability with low maintenance, these panels offer significant cost savings over time.

 

Metal curtain wall sandwich panels stand out for their blend of practicality and elegance. They provide builders with a durable, flexible, and efficient solution, making them an ideal investment for cutting-edge architectural designs.

 

Are Cold Storage Panels Essential for Seafood Warehouses? (You Bet!)
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Keeping seafood super-fresh needs seriously cold storage. Regular walls just not suitable! That's where specialized cold storage panels come in –they're absolutely essential for any seafood warehouse wanting top-quality fish and shellfish. Think of them as the super-insulated armor locking in the cold and keeping spoilage out.

 

The Heart of the Cold Room: PU/PIR Sandwich Panels

150mm Pu sandwich panel

The Best Choice for seafood cold rooms are PU/PIR: 0.02 W/(M·K) sandwich panels. Why? Their secret weapon is the super-dense, closed-cell foam core. This core acts like a powerful barrier, slashing energy bills by keeping cold air in and warm air out far better than other options. It also makes the panels strong and rigid, perfect for building large, reliable cold storage spaces. Propanel’s engineers these cores for maximum thermal efficiency, giving you cold you can count on.

 

Getting the Thickness Right Matters

Different Seafood

No.

Fish Species

Temperature Requirement (°C)

PU Panel Thickness (mm)

1

Shellfish (e.g., Mussels, Oysters)

0 to 5

75

2

Fresh Fish (e.g., Cod, Haddock)

-5 to 0

100

3

Frozen Shrimp, Crab, Lobster

-15 to -30

150

4

Fatty Fish (e.g., Salmon, Mackerel)

-18 to -24

120

5

Tuna (High-Quality)

-45 to -60

200

Notes: 

-Fresh fish require near 0°C for short-term storage (1-2 days) to prevent bacterial growth. 

-Fatty fish need lower temperatures to preserve oils and flavor. 

-Tuna demands ultra-low temperatures to maintain premium quality. 

-PU panel thickness ensures thermal insulation and energy efficiency, with thicker panels for lower temperatures to minimize heat transfer. 

-All panels are FM-certified with a closed-cell PU/PIR core for moisture resistance and durability.

 

Why Propanel PU/PIR Panels Win for Seafood？

Cold Room with Pu sandwich panels

Choosing Propanel PU/PIR sandwich panels means creating the perfect cold, stable home for your seafood. This stops freezer burn, slows down spoilage, and keeps fish fresher for longer – meaning less waste and happier customers. Plus, they install quickly, getting your valuable cold storage space up and running fast. For seafood warehouses demanding peak freshness, lower costs, and reliable performance, Propanel's PU/PIR solutions are the smart, proven choice.

Are insulated panels good for sound and thermal insulation?
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The sound insulation and heat insulation performance of the insulated panels are significantly different from the different core material. The following four common types of EPS insulated panels, PU/PIR insulated panel, glass wool insulated panel and rock wool insulated panel are explained:

 

Property 
PU/PIR  Panel
 
Rock wool/mineral wool Panel
 
Glass Wool Panel
 
EPS Panel
 
Thermal Conductivity
 
0.022~0.024W/m·k
 
0.035~0.045W/m·k
 
0.03~0.04W/m·k
 
0.03~0.04W/m·k
 
Density
 
Low(36~43kg/m³)
 
High(100~150kg/m³)
 
Low(10~50kg/m³)
 
Low(8~20kg/m³)
 
Fire Resistance
 
Moderate
 
Excellent
 
Excellent
 
Poor
 
Moisture Resistance
 
High
 
High
 
Low
 
Moderate
 
Acoustic Performance
 
Moderate
 
Excellent
 
Good 
Poor
 
Cost
 
 High
 
Moderate 
Low
 
Low

 

From the above table, the PU/PIR insulated panel has the lowest thermal conductivity and the best thermal insulation performance, followed by EPS. Because of its unique fiber structure, rock wool insulated panel has the best sound insulation effect, followed by glass wool. The EPS insulated panel has the highest cost performance. Users can choose according to different purposes.

Are Insulated Panels Safe and Comfortable for Residential Use? (Absolutely!)
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Building your dream home needs smart insulation choices. Traditional brick and mortar just can't compete anymore! That's where modern insulated sandwich panels step in--they're becoming the better solution for people who wants superior comfort, safety, and energy savings. 

 

The Advantages of Different Sandwich panel

Different type serves different residential needs perfectly.

fireproof test of rock wool

-Rock wool cores deliver exceptional fire resistance with Class A ratings, making them ideal for safety-conscious families. 

-EPS (expanded polystyrene) cores offer the light weight champion – easy installation means faster construction and lower labor costs. 

-Then there's PU (polyurethane) – the thermal performance king. With incredible insulation values around 0.02 W/(m·K).

 

The Insulated Panels’ Performance for Living Homes

-Rock wool panels keep bedrooms quiet from street noise while protecting against fire. 

eps sandwich panel

-EPS panels transform garages and workshops affordably, with installation so simple that anyone can finish the work by himself. 

-PU panels create comfortable living spaces where temperature stays consistent year-round, reducing energy waste consumption.

 

Why Propanel Delivers Home Comfort

Propanel insulated panels install quickly, getting families into comfortable homes faster. The superior insulation stops energy waste, meaning lower utility bills month after month. For homeowners demanding safety, comfort, and long-term value, Propanel's sandwich panel solutions deliver the smart, reliable choice that transforms houses into energy-efficient spaces.

 
Are insulated wall panels environmentally friendly?
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The insulated wall panel is composed of 2 layers of galvanized steel plate (or aluminum plate) and a layer of insulation core material (EPS,PU and rock wool, etc.). Its environmental performance mainly depends on the insulation core material, from the following dimensions for comparative analysis.

 

Dimensions

EPS

PU（polyurethane）

Rock wool

Raw material and use release

New materials are non-toxic and formaldehyde-free; inferior recycled materials may release VOCs.

No release of high-quality products; TDI or harmful flame retardants are residual in low-quality products.

No chemical release, but may produce dust irritating respiratory tract.

Production and energy consumption

Energy consumption is moderate, and VOCs pollution may occur in the treatment of recycled materials.

Higher energy consumption, more environmentally friendly MDI process

High energy consumption (ore melting needs high temperature), need to control dust

Energy saving and carbon reduction

Thermal insulation medium (thermal conductivity 0.033-0.038W/(m · K))

Optimal thermal insulation (thermal conductivity ≤ 0.024W/(m · K)), energy saving and carbon reduction is the strongest

Weak insulation (thermal conductivity 0.040-0.048W/(m · K))

Combustion and Safety

Flammable, flame retardant may release toxic fumes

Flammable, high quality flame retardant smoke toxicity is low

Non-combustible (Class A1), no toxic smoke

Waste disposal

Refractory degradation, low recycling rate

Difficult to degrade, difficult to recycle

Natural degradation, landfill without chemical pollution

 

Rock wool sandwich panel connection sample

In summary, high-quality PU wall panel energy-saving optimal, suitable for long-term energy-saving needs; high-quality EPS wall panel cost-effective, need to avoid recycling materials; rock wool wall panel fire prevention and waste environmental protection outstanding, but need to control dust. The core of environmental protection is "high-quality product selection"-organic materials to avoid inferior recycling materials, inorganic materials to choose low dust.Different choices can be made according to the different uses of the building.

Are Metal Roof Panels Noisy During Rain or Hail? --Not Anymore!
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Compared with old-style single metal roof system’s definitely noisy, the modern insulated sandwich metal roof panels stepping in – they're right one that replace noisy metal into the quiet protection. 

 

The Secret: Insulated Core Technology

Sandwich panel keep the nose away

The key is what inside the middle of the sandwich panel. Each core material tackles noise differently while delivering bonus benefits. 

·Rock wool cores sandwich roof panels are the acoustic champions – those dense mineral fibers absorb sound waves, cutting rain noise by up to 40dB while providing Class A fire protection. 

·EPS cores sandwich roof panels offer the budget-friendly solution. Lightweight and affordable, reduce noise compared to single metal roof. 

·Then there's PU sandwich roof panels– the premium performer. With superior density and 0.02-0.024 W/(m·K) thermal values. The closed-cell structure blocks both sound transmission and heat transfer.

 

Real-World Sound Performance

Single metal roofs noise is 55-60 DB during heavy rain – that's conversation-level noise disrupting sleep. Propanel's insulated metal sandwich panels drop this to 25-30 DB – quieter than a whisper!

 

Why Propanel Delivers Quiet Comfort

Propanel insulated metal roof sandwich panels means to use noise-reduction technology. These panels install quickly while creating peaceful indoor environments that last decades. The quickly insulation stops both sound and energy waste. 

 

Best Practices for Installing Metal Roof Panels on Large Projects
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Discover PROPANEL Sandwich Metal Roofing Systems

PROPANEL sandwich metal roofing systems are a good choice for Large Projects. Made with a strong metal exterior and an insulating core, these panels resist extreme weather like heavy rain or strong winds. Whether it’s a warehouse or a factory project, PROPANEL gives a long-lasting solution that you can wait for.

 

Why Choose Sandwich Panels for Your Roof?

Sandwich panels from PROPANEL bring more than just strength. The design has better heat insulation, making buildings super energy-efficient. This means lower heating and cooling bills for your building. The insulation also cuts down noise, perfect for busy industrial spaces. With PROPANEL, you get a roof that saves money and keeps things comfortable inside.

 

Easy Installation with PROPANEL

Sandwich Roof panel installation site

One big advantage of PROPANEL sandwich metal roofing is how simple it is to install. The lightweight panels fit together quickly, saving time on big projects. No need for professional tools or long times—contractors will love how fast they can get the job done. PROPANEL’s prefab building material system means your roof is up and ready without any trouble.

 

PROPANEL: Built for Efficiency and Strength

What makes PROPANEL so good for the building? It’s the combination of insulation and easy installation (prefabricated steel building materials). These sandwich roof panels keep buildings cooler in summer and warmer in winter, giving strong against for extreme weather. From storage rooms to large workshops, PROPANEL offers a reliable, low-maintenance roofing option that both better performance and value.

Can metal roof panels be installed over existing roofs?
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Metal roof panels can usually be installed on top of existing roofs. This “roof installation” scheme is relatively common in industrial plants, warehouses, and renovation of old buildings.

 

The metal roof panel itself is light in weight, with a conventional weight of 10-30 kg/㎡, which is much lower than the weight of the concrete roof (200-300 kg/㎡), and if the existing roof (such as concrete roof, steel roof) is structurally sound, it can carry additional loads without substantial reinforcement. And different corresponding solutions can be selected for different original roofs: the concrete roof is fixed with galvanized C-shaped steel purlins + expansion bolts, the old metal roof is connected with aluminum alloy keels (lightweight) + waterproof gasket screws, and the wooden roof is anti-corrosion Purlins can avoid damaging the original structure and are flexible.

 

If the existing roof waterproofing layer is intact and only slightly defective, it can be installed directly after cleaning. There is no need to remove the old roof, eliminating the cost of demolition and garbage removal. The construction period is more than 50% shorter than “demolition and reconstruction”. It is suitable for buildings that need to be quickly restored to use (such as factories and warehouses), with low cost and short construction period. At the same time, the metal roof panel also protects the original roof。At the same time, it can isolate rain, snow, and ultraviolet rays, extend the service life of the old roof base (such as concrete and wooden keels), and reduce the frequency of repair of the original roof. And General metal roof panels have low thermal conductivity, good thermal insulation performance, good fire protection performance, high safety factor, fire protection, wind resistance, and corrosion resistance (such as aluminum-magnesium-manganese plates, galvanized color steel plates), which can improve the overall disaster resistance of the roof. ability.

 

Overall, if the original roof structure is intact and the load-bearing capacity is sufficient, the installation of metal roof panels is a cost-effective renovation plan.

Can Sandwich Panels Be Customized for Design and Size?
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Sandwich panels can be customized for design and size to meet exact project specs for sure. 

 

Common sandwich panel’s thickness varies from 30mm to 300mm, and lengths from 400mm to 12000mm. Factories use automated cutting for precision during production. Quality checks test thickness fittings and core density to ensure standards.

different core material sandwich panels

While the core materials of sandwich panel also allow custom options: EPS for light weight, rock wool/glass wool for sound control and fire safety, and PU/PIR for better insulation. As professional rock wool panel china manufacturer as well as china cold storage panel manufacturer—PROPANEL, is engaged to give the best products to customer.

 

The metal surface layers include steel sheet, aluminum plate, or stainless-steel sheet... Inspections verify material bonds and fire ratings with lab tests.

 

The paint types of metal surface offer customization: PE for basic protection, HDP for higher durability, SMP for higher weather resistance, and PVDF for longer color life. Panels go through roller coating in production for even finish. This step follows strict color matching. Final quality detection uses visual and machine scans to confirm paint adhesion and thickness.

 

Special shapes sandwich panels like triangles or circles satisfy unique needs. Molds shape panels during manufacturing for custom fits. These handles curved or angled designs. Production ends with load tests and seal checks to confirm strength. Such special quality control ensures panels perform in all kinds of buildings’ roofs or walls.

Can Sandwich Panels Be Used in High-Humidity Environments?
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Sandwich panels can be used in high humidity environments. Sandwich panels are usually constructed of a double-layer steel plate and a layer of core material, which can achieve a good moisture-proof effect by selecting a core material and a steel plate with moisture-proof performance, and by the correct sealing installation method.

High humidity environments (such as coastal buildings, food factories, cold storage) need to prevent moisture penetration and corrosion. The steel plate serves as the outer defense line. Galvanized/aluminum zinc coated steel plates (with PVDF or polyester coating, salt spray resistance, rust resistance) are preferred, avoid un-coated steel plates or ordinary plywood (easy to rust, Water-absorbent layer); the core material needs to avoid porous water-absorbent types (such as ordinary EPS foam, untreated rock wool), choose closed-cell or hydrophobic models ——polyurethane (PU, closed-cell rate exceeds 90%, less water absorption), extruded polystyrene (XPS, high density, moisture-proof), this type of core material can prevent moisture from intruding and losing heat preservation or mold, and breeding bacteria. 

 

At the same time, when the sandwich panel is installed, the joints and screw holes of the sandwich panel need to be sealed with weather-resistant sealant (such as silicone glue, butyl tape) to prevent moisture from penetrating through the gaps; 50-100mm ventilation gap can be reserved for enclosed spaces (such as walls) to reduce internal condensation water; stainless steel screws or galvanized screws are selected, and waterproof gaskets are used avoid formation after rusting “tidal channels”. Meanwhile, check the panel coating regularly for breakage, sealant cracking, etc. If small defects are found, repair them promptly to prevent the vulnerability from expanding.

 

Currently sandwich panels are widely used in various high humidity environments, such as food/aquatic processing plants, cold storage/cold chain warehouses, factory buildings in rainy areas in the south, and underground space/civil air defense engineering with their excellent moisture-proof and impermeable properties, high-quality thermal insulation/insulation, corrosion resistance, and the ability to be installed quickly.

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