When planning a metal structure—whether it’s a warehouse, factory, or commercial building—choosing the right type of insulation in your sandwich panel system is a key decision. It directly affects thermal efficiency, fire safety, sound insulation, and energy costs.
At Hasanoglu Steel Structures, we guide our clients to select the most suitable insulation based on their specific project needs. In this article, we’ll walk you through the main insulation types used in sandwich panels and when to choose each one.
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- EPS (Expanded Polystyrene) – Budget-Friendly and Versatile
EPS is one of the most commonly used insulation materials due to its affordability and lightweight structure. It provides decent thermal performance and is widely used in industrial and commercial buildings where fire resistance is not a strict requirement.
Advantages:
- Lightweight and easy to install
- Good thermal insulation
- Cost-effective
Best for:
Projects with tight budgets or standard usage where fire risk is low.
- PUR / PIR (Polyurethane / Polyisocyanurate) – High-Efficiency Thermal Insulation
These advanced insulation materials offer excellent thermal resistance and improved fire behavior, especially PIR. They are ideal for buildings where temperature control and energy efficiency are crucial.
Advantages:
- Highest insulation performance per thickness
- Moisture resistance
- Good fire resistance (especially PIR)
Best for:
Cold storage rooms, food processing plants, or any building requiring strong thermal insulation.
Rockwool is known for its excellent fire resistance and soundproofing capabilities. It’s a preferred solution in industrial buildings or public facilities where fire safety is a top concern.
Advantages:
- Fire resistance up to 1000°C
- Superior sound insulation
- Durable and eco-friendly
Best for:
Industrial plants, power stations, public buildings, or structures with strict fire safety regulations.
Comparison Table: Which One Should You Choose?
| Factor | Best Option |
| Budget constraints | EPS |
| Maximum thermal insulation | PUR / PIR |
| High fire resistance | Rockwool |
| Sound insulation | Rockwool |
| General internal use | EPS |
| Cold storage or temperature-sensitive use | PUR / PIR |
Final Thoughts
Choosing the right insulation type for your sandwich panels is a critical step that influences your building’s long-term performance. At Hasanoglu Steel Structures, we’re here to support you with technical expertise and custom solutions tailored to your project and budget.
📩 Contact us today to receive a tailored quotation and professional support for your next steel structure project!