Rockwool RWA45 Insulation Slab

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  • Size of boards: 600 x 1200mm
  • Excellent thermal, acoustic and fire insulation
  • Suitable for a wide range of general building applications
  • Non-combustible
  • Water repellent
  • Dimensionally stable
  • Rockwool RWA45 Slabs are sold per pack

Rockwool RWA45 Slab

Rockwool RWA45 Slabs are intended for a wide range of building applications including acoustic, thermal and fire protection of partition walls, ceilings, floors and roofs. These high-quality resin bonded slabs are available in a wide range of thicknesses and densities to suit all requirements. 

Rockwool products achieve a Euroclass A1 classification for non-combustibility. The safest insulation material on the market, RWA45 Slabs actively prevent the spread of flames in the event of a fire. RWA45 Slabs offer all-round performance with their robust form and water repellent qualities. They are also very easy to handle and install and are available with a range of facings (aluminium foil, black or white tissue) on request. 

Technical specification

  • Composition: mineral wool
  • Thermal conductivity: 0.035W/mK
  • Reaction to fire: Euroclass A1
  • Size of boards: 600 x 1200mm
  • Thicknesses available: 25mm, 30mm, 40mm, 50mm, 60mm, 75mm, 100mm

Coverage per pack

Thickness (mm) Boards per pack M2 per pack
25 16 11.52
30 12 8.64
40 12 8.64
50 9 6.48
60 8 5.76
75 6 4.32
100 4 2.88


Rockwool RWA45 should be installed in accordance with the manufacturer’s installation guidelines – these should cover design and all aspects of the application of the insulation. 


Shelf life: please see the manufacturer’s date of expiry. Keep in a dry place, in the original packaging. Avoid excess heat or UV light exposure.


25mm – 11.52m2, 30mm – 8.64m2, 40mm – 8.64m2, 50mm – 6.48m2, 60mm – 5.76m2, 75mm – 4.32m2, 100mm – 2.88m2


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