Rigid, Semi-rigid and Flexible Slabs
ProductRockwool Rigid, Semi-rigid and Flexible Slabs are high quality resin bonded Rockwool Slabs that can be used for thermal, acoustic and fire insulation. They are manufactured in a variety of thicknesses and densities to suit most requirements. They are suitable for many applications including thermal insulation for floors, walls, roofs and boiler rooms.
Ventilation plant in all types of buildings, offshore platforms and ships, acoustic ceilings and partition panels. |  |
Versatile thermal acoustic insulation slabs Advantages• Excellent thermal, acoustic and fire insulation
• Water repellent
• Resists high temperatures
• Easy to handle and install
• Cost effective
• No maintenance
• Black or white tissue and aluminium foil facings available StandardsRockwool Slabs conform to BS EN 13162: 2001. Thermal insulation products for buildings – factory made mineral wool (MW) products – specification, and satisfy the requirements of BS 5422 ‘Method for specifying thermal insulating materials for pipes, tanks, vessels ductwork and equipment....’ Description Dimensions
Standard sizes: See table below
Thicknesses: 25*, 30, 40, 50, 60, 75 and 100mm
Types and densities | | kg/m3 | Size (mm) | Thickness | | RWA45 | 45 | 1200 x 600+ | 30,40,50,60,75,100 | | RW3 | 60 | 1200 x 600+ | 25,30,40,50,60,75,100 | | RW4 | 80 | 1000 x 600 | 50,75,100 | | RW5 | 100 | 1000 x 600 | 25,30,40,50,60,75,100 | | RW6 | 140 | 1000 x 600 | 30,50,75,100 |
Other sizes and thicknesses are available to special order
*25mm is a non-standard thickness for RW6
+All ‘faced’ RWA45 and RW3 thicknesses will be 1000 x 600mm in size Performance and properties Resistance to compression | | Stress req'd to produce 10% compression (kN/m2) | Stress req'd to reach elastic limit de(kN/m2) | Displacement at 5kN/m2 stress | | RWA45 | 3.0 | 3.5 | 16.5 | | RW3 | 6.7 | 6.1 | 7.0 | | RW4 | 12.9 | 9.2 | 5.5 | | RW5 | 16.4 | 11.3 | 4.6 | | RW6 | 28.2 | 26.1 | 4.2 |
Tested in accordance with BS EN 826:1996
NB Elastic limit occurs between 6 and 12% deformation Fire
Rockwool RW slabs are certified by Lloyd's Register of Shipping as non-combustible materials for use on:
• fixed offshore installations
• MED classed ships - DTLR MCA approval
Rockwool RW slabs are rated non-combustible in accordance with ISO 1182 and IMO A. 799 Water Resistance
Rockwool RW slabs are highly water repellent. Where it is necessary to maintain water repellency subsequent to heating at elevated temperatures, the use of WRG grade slabs is recommended. Bending radius
Curved surfaces can be insulated with Rockwool Slabs. The table below gives the minimum bending radius for several Rockwool Slabs. Bending to smaller radii can deform the product and increase the installation time.
Minimum bending radius for Rockwool slabs
(These typical figures depend on the installation method)
| Product | Slab thickness | (mm) | | | | | | | | 30 | 40 | 50 | 60 | 75 | 80 | 100 | | RWA45 | 425 | 500 | 700 | 900 | 1200 | 1300 | 1800 | | RW3 | 425 | 500 | 700 | 1000 | 1350 | 1500 | 1900 | | RW5 | 550 | 700 | 1000 | 1500 | 2250 | 2500 | 2500 | | RW6 | 1500 | 1900 | 2600 | 3000 | 3300 | 3400 | 3500 |
All radii given in millimetres. Tissue faced slabsSlab size: 1000mm x 600mm
Rockwool manufacture a wide range of tissue faced, line produced slabs, ranging from45 kg/m3 to 140 kg/m3. See current price list for full range.
The tissues are bonded to the face of the slabs with binder which provides a superior acoustic and fire performance to fabricated, adhesive applied, tissue faced products.
70 gramme black and 100 gramme white tissue options are available from Rockwool.  
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