A Complete Guide Explaining Different Types of Sandwich Panels
Sandwich panels are pre-fabricated building elements, comprised of two metal sheets with an insulating core sandwiched between them. They are utilized for walls, roofs and partitions of industrial and commercial buildings. The insulation layer can be PU, PIR, EPS, Rockwool or Glass Wool. That option will affect insulating value, fire resistance, sound-blocking ability, weight and cost of the panel. PU and PIR is often used for cold storage. EPS is better for a lower budget building. Rockwool and Glass Wool are utilized where sound control and fire safety are most important. The right panel is not only about price, but what the structure needs.
- PU and PIR panels offer the strongest thermal insulation for cold storage and refrigerated facilities
- PIR provides better fire resistance than standard PU, suited to food and pharma projects
- EPS is the most budget-friendly core but offers only moderate insulation and fire performance
- Rockwool delivers the strongest fire resistance and acoustic performance for sensitive applications
- Glass Wool balances cost, insulation and moderate fire resistance in one panel
- Panel choice should always follow project needs, not just upfront material cost
Modern construction is more than building a solid structure. Projects need to be done faster, keep the inside temperatures comfortable or controlled and work reliably for years. This is where sandwich panels have established a solid niche in industrial and commercial peb construction. From warehouses and factories to cold storage facilities and cleanrooms, these panels offer a practical means of insulation, protection and faster installation in one construction system.
In this article you will learn what are sandwich panels, the main types of sandwich panels and where each type of sandwich panel is utilised. We will also cover the primary benefits and differences of these sandwich panels to give you an idea of which would be suited for your project.
What Are Sandwich Panels, And Why Are They So Widely Used
Sandwich panels are ready-made building parts, which consist of two metal skins and an insulating core. The core provides thermal or acoustic insulation and the outside sheets give protection, stiffness and a completed surface.
Sandwich panels are very frequent in commercial and industrial building. They are utilized for walls of factories, warehouse roofs, cold rooms, cleanrooms, partitions and other facilities where insulation and speed of installation are important. Current industry guides also indicate that thermal performance, condensation management, fire safety and running cost are essential criteria in selecting the core material.
Another reason for their popularity is that they are versatile. varying core materials can offer varying combinations of thermal insulation, fire resistance, acoustic performance and cost. This means that there is no one sandwich panel that is perfect for every job. The first thing should be the function of the building.
Types of Sandwich Panels by Core Material
PU (Polyurethane) Sandwich Panels
The PU sandwich panel use rigid polyurethane foam as the core material layered between two metal sheets. The panel offers excellent thermal insulation properties and lightweight panels because of its closed-cell structure design. PU Sandwich Panels are commonly used for insulated roofs, walls, cold rooms, refrigerated units and warehouses where indoor temperature stability is important. PU makes sense if you want good insulation without going for thicker panels. But always check fire ratings against the project specific requirements and the specification of the panel provided by manufacturer.
PIR (Polyisocyanurate) Sandwich Panels
PIR panels are similar to PU panels but made to handle fire better while giving strong insulation. They're a recommended for cold storage, food processing units, pharma facilities, and other buildings that need strict temperature control. Fire ratings of the panel can vary by manufacturer to manufacturer, always check panel specifications and confirm it meets your project's actual fire safety requirements.
EPS (Expanded Polystyrene) Sandwich Panels
EPS panels use expanded polystyrene foam as the core, making them light in weight and easy on the budget. They give decent insulation and are widely used in industrial peb buildings, prefab structures, and general insulated walls. Don't pick EPS just because it's cheaper, first check the building's fire safety requirements, working conditions, and insulation needs to make sure it's the right fit.
Rockwool Sandwich Panels
Rock wool sandwich panels use mineral wool as their core material. Their core advantage is fire resistance, which allows them to be used in buildings with strict fire safety requirements. They also have excellent sound insulation performance, making them suitable for noisy industrial areas, or any locations that require both fire prevention and sound insulation.
Glasswool Sandwich Panels
Glass wool sandwich panels uses spun glass fibers as its core material. It combines excellent thermal and sound insulation properties with more stable fire resistance compared to Rockwool panel. It is commonly used in manufacturing facilities and peb buildings that require temperature control and noise reduction. As a cost-effective alternative to rock wool, it is only suitable for moderate fire protection requirements.
Quick Comparison of Sandwich Panels
| Factor | PU | PIR | EPS | Rockwool | Glass Wool |
|---|---|---|---|---|---|
| Thermal insulation | High | High | Moderate to good | Good | Good |
| Fire performance | Depends on product and system | Generally stronger than conventional PU | Requires careful project assessment | Strong fire resistance | Good, moderate compared to Rockwool |
| Acoustic performance | Good | Good | Limited compared with mineral wool | Strong | Strong |
| Weight | Lightweight | Lightweight | Lightweight | Heavier than foam cores | Lighter than Rockwool, heavier than foam cores |
| Relative cost | Moderate | Higher than PU | Lowest | Higher than foam cores | Moderate to higher, below Rockwool |
| Common use | Cold rooms, industrial buildings | Cold storage and specialized facilities | Cost-conscious insulated buildings | Fire-sensitive and acoustic applications | Industrial sheds and warehouses needing sound control |
| Main selection reason | Thermal insulation | Thermal plus fire considerations | Practical and economical insulation | Fire and acoustic performance | Cost-effective fire and acoustic performance |
Conclusion
Whether it's an industrial shed, a cold storage, a cleanroom or a commercial structure, sandwich panels provide insulation, protection and faster installation, all in one. It’s not only the upfront expense, the appropriate option is about matching the core material (PU, PIR, EPS, Rockwool or Glass Wool) to the actual thermal, fire and acoustic needs of your project.
KMS Technologies is a reputed PEB Manufacturer in Greater Noida, ISO 9001 certified and with in-house fabrication thus, we can match the proper panel system to your building from design to installation. We have provided Pre-engineered buildings and sandwich panel solutions to the business clients such as Infosys, Emmar Group, Steel Strong Valves and Star Cement. See our completed projects.
For a project inquiry or panel supply please email us at [email protected] or call us on +919311719666 to speak to our staff directly.