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Rockwool, also known as mineral wool, is an insulation material made from natural stone or mineral fibers. The density of Rockwool refers to the mass of the material per unit volume, and it is commonly expressed in kilograms per cubic meter (kg/m�³) or pounds per cubic foot (lb/ft�³). The density of Rockwool can vary depending on the specific product and its intended application. Common densities for Rockwool insulation products range from approximately 40 kg/m�³ (2.5 lb/ft�³) to 200 kg/m�³ (12.5 lb/ft�³) or more. The choice of density often depends on factors such as thermal performance requirements, structural support needs, and the specific application of the insulation.

XPS Insulation (Extruded Polystyrene): "XPS" commonly refers to extruded polystyrene insulation. This type of insulation is known for its closed-cell structure, providing good thermal resistance and moisture resistance. It is often used in various construction applications, such as insulating walls, roofs, and foundations. B1 Fire Rating: The "B1" component might refer to a fire rating. In some fire classification systems, materials are rated based on their fire resistance, and "B1" could indicate a certain level of fire resistance. For example, in the European fire classification system (Euroclass), B1 represents a material with limited combustibility.

"ISO" in the context of polyisocyanurate insulation typically refers to the insulation material's type or category rather than an acronym. Polyisocyanurate is a type of rigid foam insulation known for its high thermal resistance (R-value) and effectiveness in providing thermal insulation.