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👉 Check Latest PriceROCKWOOL RW3 has been developed for thermal, acoustic and fire performance in a range of construction types. RW3 is made up of high-quality resin bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects. The ROCKWOOL slabs can be applied to an array of general building applications for acoustic and thermal insulation of partition walls, ceilings, floors and roofs. The multi-use solution is well suited for easy application throughout constructions. RW3 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW3 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW3 insulation slabs achieve Lambda 0.034 W/mK and are available in eight standard thicknesses from 25-100mm.