Rockwool (RW) Building Slabs
Acoustic and thermal building slabs - RWA45, RW3, RW4, RW5 and RW6
Excellent thermal, acoustic and fire insulation.
Suitable for a wide range of general building applications.
Non-combustible – Euroclass A1.
Availabile in a range of densities from 45 kg/m³ to 140 kg/m³.
Reduce noise, either by impeding the transmission of sound through an element of the structure or by absorption of sound at the surface.
Made from diabase rock, which is a renewable and plentiful natural resource.
Does not contain gases that have ozone depletion potential (ODP) or global warming potential (GWP).
Thicknesses and Availability:
RWA45 (45 kg/m³ density) : 25mm, 30mm, 40mm, 50mm, 60mm, 75mm, and 100mm (some thicknesses may only be available in pallet quantities as they will need to be sourced from the manufacturer before being delivered to site)
RW3 (60 kg/m³ density): 25mm, 30mm, 40mm, 50mm, 60mm, 75mm, 90mm, 100mm, and 120mm (some thicknesses may only be available in pallet quantities as they will need to be sourced from the manufacturer before being delivered to site)
RW4 (80 kg/m³ density): Special request, 100mm in pallets only. Made to order only: 50mm and 75mm can be manufactured, but require a minimum order of 16 x pallets for the 50mm and 22 x pallets for the 75mm
RW5 (100 kg/m³ density): 25mm, 30mm, 40mm, 50mm, 60mm, 75mm, and 100mm (some thicknesses may only be available in pallet quantities as they will need to be sourced from the manufacturer before being delivered to site)
RW6 (140 kg/m³ density): Made to order only: 50mm, 75mm and 100mm can be manufactured, but require a minimum order of 8 x pallets for the 50mm, 12 x pallets for the 75mm, and 16 x pallets for the 100mm
General information about Rockwool (RW) Building Slabs
Thermal and Acoustic Building Slabs
Rockwools versatile building slabs, RWA45, RW3, RW4, RW5 and RW6, are suitable for use in acoustic, thermal and fire protection applications in partitions, ceilings, floors, and roofs.
Durable non-combustable stone wool spun from volcanic rock, resin bonded into slabs
Unfaced as standard, however, we may be able to supply tissue or foil faced Rockwool slabs on request, depending on requirements
|Thermal Conductivity||0.035 or 0.034 W/mK depending on product range|
|Nominal Density||Range from 45kg to 140kg per m³|
|Fire Performance||Classification A1||BS EN 13501-1|
|Surface Spread of Flame||Non-combustable|
Buy Rockwool (RW) Building Slabs
Limited stock of the most popular densities and slab thicknesses are held at most of our depots. Where we need to bring stock in from the manufacturer, please allow up to 2 weeks for delivery
Please observe the 'Star Rating' indicators to assess availability.
Generally 1 or 2 days for delivery
Generally 1 to 5 days for delivery
Generally 5 to 10 days for delivery
Generally 5 to 15 days for delivery
Please call to check availability and approximate lead times
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations
Product Performance and Guides
Product Performance, Manufacturer Certification, Downloads, and Installation Guides
While we have provided Thermal Resistance values for all thicknesses on the Rockwool RW Building Slabs datasheet, some thicknesses may not be readily available.
Items highlighted in green are generally held in stock at our depots.
|Rockwool RWA45 25mm||25mm||0.71 m²K/W||45 kg/m³|
|Rockwool RWA45 30mm||30mm||0.85 m²K/W||45 kg/m³|
|Rockwool RWA45 40mm||40mm||1.14 m²K/W||45 kg/m³|
|Rockwool RWA45 50mm||50mm||1.42 m²K/W||45 kg/m³|
|Rockwool RWA45 60mm||60mm||1.71 m²K/W||45 kg/m³|
|Rockwool RWA45 75mm||75mm||2.14 m²K/W||45 kg/m³|
|Rockwool RWA45 100mm||100mm||2.85 m²K/W||45 kg/m³|
|Rockwool RW3 25mm||25mm||0.73 m²K/W||60 kg/m³|
|Rockwool RW3 30mm||30mm||0.88 m²K/W||60 kg/m³|
|Rockwool RW3 40mm||40mm||1.17 m²K/W||60 kg/m³|
|Rockwool RW3 50mm||50mm||1.47 m²K/W||60 kg/m³|
|Rockwool RW3 60mm||60mm||1.76 m²K/W||60 kg/m³|
|Rockwool RW3 75mm||75mm||2.2 m²K/W||60 kg/m³|
|Rockwool RW3 90mm||90mm||2.64 m²K/W||60 kg/m³|
|Rockwool RW3 100mm||100mm||2.94 m²K/W||60 kg/m³|
|Rockwool RW3 120mm||120mm||3.52 m²K/W||60 kg/m³|
|Rockwool RW4 50mm||50mm||1.47 m²K/W||80 kg/m³|
|Rockwool RW4 75mm||75mm||2.2 m²K/W||80 kg/m³|
|Rockwool RW5 25mm||25mm||0.73 m²K/W||100 kg/m³|
|Rockwool RW5 30mm||30mm||0.88 m²K/W||100 kg/m³|
|Rockwool RW5 40mm||40mm||1.17 m²K/W||100 kg/m³|
|Rockwool RW5 50mm||50mm||1.47 m²K/W||100 kg/m³|
|Rockwool RW5 60mm||60mm||1.76 m²K/W||100 kg/m³|
|Rockwool RW5 75mm||75mm||2.2 m²K/W||100 kg/m³|
|Rockwool RW5 100mm||100mm||2.94 m²K/W||100 kg/m³|
|Rockwool RW6 50mm||50mm||1.42 m²K/W||140 kg/m³|
|Rockwool RW6 75mm||75mm||2.14 m²K/W||140 kg/m³|
|Rockwool RW6 100mm||100mm||2.85 m²K/W||140 kg/m³|
Standards & Approval
Rockwool RW Slabs conform to: BS EN 13162:2012: Thermal insulation products for buildings. Factory made mineral wool (MW) products.
Rockwool RW slab products, either un-faced or with an aluminium foil or glass fleece on one or both surfaces, achieve an A1 classification in accordance with BS EN 13501-1 and therefore comply with the requirements of non-combustible materials/products, as defined in all UK and Ireland Building Regulations.