{"id":70573,"date":"2025-05-24T07:48:05","date_gmt":"2025-05-24T05:48:05","guid":{"rendered":"https:\/\/panelsandwich.org\/types-of-sandwich-panels-according-to-their-insulation-core-pur-pir-rockwool-and-more\/"},"modified":"2026-01-15T10:00:12","modified_gmt":"2026-01-15T09:00:12","slug":"types-of-sandwich-panels-according-to-their-insulation-core-pur-pir-rockwool-and-more","status":"publish","type":"post","link":"https:\/\/panelsandwich.org\/en\/types-of-sandwich-panels-according-to-their-insulation-core-pur-pir-rockwool-and-more\/","title":{"rendered":"Types of Sandwich Panels according to their Insulation Core: PUR, PIR, Rockwool and More"},"content":{"rendered":"\n

When choosing the right sandwich panel<\/strong> for a roof, fa\u00e7ade or enclosure, one of the most important factors is the type of insulating core<\/strong> inside. The core not only defines the level of thermal or acoustic insulation<\/strong>, but also the fire performance, durability and weight of the panel. In this article we analyze the main types: PUR, PIR, rock wool and other materials<\/strong>, to help you choose the best sandwich panel insulation<\/strong> for your project. <\/p>\n\n

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1. Sandwich panel with Polyurethane (PUR) core<\/h2>\n\n

The PUR sandwich panel<\/strong> is one of the most widely used in industrial, agricultural and residential construction. Its rigid polyurethane foam<\/strong> core stands out for its high thermal insulation properties<\/strong>, even at reduced thicknesses. This makes it an energy-efficient and very popular choice for roofs and enclosures where a good indoor temperature is required in both summer and winter. <\/p>\n\n

Advantages of the PUR sandwich panel<\/strong>:<\/p>\n\n

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  • Excellent thermal insulation<\/strong>.<\/li>\n\n\n\n
  • Very light<\/strong>, making it easy to transport and assemble<\/strong>.<\/li>\n\n\n\n
  • Very competitive price-quality ratio.<\/li>\n<\/ul>\n\n

    Although its fire performance is limited compared to other materials, it is still an excellent choice when the main criterion is thermal efficiency.<\/p>\n\n

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    2. Sandwich panel with Polyisocyanurate (PIR) core.<\/h2>\n\n

    The PIR sandwich panel<\/strong> is an evolution of PUR, with a similar but improved chemical structure. Its great advantage is its higher fire resistance<\/strong>: it achieves higher reaction-to-fire ratings without losing insulating capacity. <\/p>\n\n

    PIR panel characteristics<\/strong>:<\/p>\n\n

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    • Very good thermal insulation<\/strong>.<\/li>\n\n\n\n
    • Better fire performance than PUR (classification Bs1d0 or higher).<\/li>\n\n\n\n
    • Good dimensional stability at high temperatures.<\/li>\n<\/ul>\n\n

      The PIR panel has become the preferred choice for projects where fire safety<\/strong> is a key factor, such as industrial buildings, logistics centers or public facilities.<\/p>\n\n

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      3. Sandwich Panel with Rock Wool Core<\/h2>\n\n

      If the objective is to obtain excellent acoustic protection and fire resistance<\/strong>, the rockwool sandwich panel<\/strong> is the best choice. This type of panel is composed of mineral fibers arranged in layers, which provides an effective barrier against noise and heat. <\/p>\n\n

      Advantages of the rock wool panel<\/strong>:<\/p>\n\n

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      • Excellent acoustic insulation<\/strong>.<\/li>\n\n\n\n
      • Maximum fire resistance<\/strong> (A1 classification).<\/li>\n\n\n\n
      • Good thermal behavior.<\/li>\n<\/ul>\n\n

        It is very common in enclosures where sound control and safety are paramount, such as auditoriums, machine rooms, transformer stations or homes in noisy urban areas.<\/p>\n\n

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        4. Other cores: Expanded Polystyrene (EPS) and Extruded Polystyrene (XPS).<\/h2>\n\n

        There are also sandwich panels with EPS or XPS<\/strong> cores, two types of polystyrene with different characteristics. They are less common in roofing, but can be found in economical or specific solutions for certain sectors. <\/p>\n\n

        EPS (Expanded Polystyrene)<\/strong>:<\/p>\n\n

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        • Acceptable thermal insulation.<\/li>\n\n\n\n
        • More economical option.<\/li>\n\n\n\n
        • Lightweight and easy to install.<\/li>\n<\/ul>\n\n

          XPS (Extruded Polystyrene)<\/strong>:<\/p>\n\n

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          • Better moisture resistance than EPS.<\/li>\n\n\n\n
          • Superior thermal insulation.<\/li>\n\n\n\n
          • Something more rigid and durable.<\/li>\n<\/ul>\n\n
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            What is the best insulation for a sandwich panel?<\/h2>\n\n

            The choice of the best sandwich panel insulation<\/strong> depends on the intended use. If you need maximum thermal efficiency at low cost, PUR<\/strong> is ideal. If you prioritize fire performance without losing insulation, choose PIR<\/strong>. If your concern is noise or you work in an environment that requires certified fire resistance, rock wool<\/strong> is undoubtedly the best option. <\/p>\n\n

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            Conclusion<\/h2>\n\n

            Knowing the different types of insulation core in sandwich panels<\/strong> is key to making an informed decision. Whether you are designing an industrial roof, an acoustic enclosure or a prefabricated module, making the right choice between PUR, PIR or rock wool sandwich panels<\/strong> will ensure a durable, efficient and customized result. <\/p>\n\n

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