Rockwool RWA45 RW3 and RW5 acoustic and thermal building slab Rockwool Insulation

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

Due to supply challenges from the manufacturers, please allow extended lead times on Rockwool products. Please feel free to contact me to check availability and lead times.

Product Information

General information about Rockwool (RW) Building Slabs

Product Application

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.

Product Make-up

Core

Durable non-combustable stone wool spun from volcanic rock, resin bonded into slabs

Facings

Unfaced as standard, however, we may be able to supply tissue or foil faced Rockwool slabs on request, depending on requirements

Product Properties

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
Slab Length 1.2m
Slab Width 0.6m
Board Edge Square
Vapour Resistance Negligable

Product Prices

Buy Rockwool (RW) Building Slabs

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple slabs... 16 x 0.6x1.2m = 11.52m² - in this instance, there are 16 x slabs in a pack where each slab is 0.6m x 1.2m providing a total coverage of 11.52m² per pack.

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RWA45 25mm, 16 x 0.6x1.2m = 11.52m² - ranging from £1.51 to £1.58 per m²

1 plus packs @ £1.58 per m² / £1.14 per slab = £18.23 (£21.88 inc-VAT) per pack
6 plus packs @ £1.57 per m² / £1.13 per slab = £18.07 (£21.68 inc-VAT) per pack
12 plus packs @ £1.55 per m² / £1.12 per slab = £17.91 (£21.49 inc-VAT) per pack
18 plus packs @ £1.54 per m² / £1.11 per slab = £17.75 (£21.30 inc-VAT) per pack
24 plus packs @ £1.53 per m² / £1.10 per slab = £17.59 (£21.11 inc-VAT) per pack
30 plus packs @ £1.51 per m² / £1.09 per slab = £17.43 (£20.92 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RWA45 50mm, 9 x 0.6x1.2m = 6.48m² - ranging from £2.93 to £3.06 per m²

1 plus packs @ £3.06 per m² / £2.21 per slab = £19.86 (£23.83 inc-VAT) per pack
8 plus packs @ £3.04 per m² / £2.19 per slab = £19.68 (£23.62 inc-VAT) per pack
16 plus packs @ £3.01 per m² / £2.17 per slab = £19.51 (£23.41 inc-VAT) per pack
24 plus packs @ £2.98 per m² / £2.15 per slab = £19.33 (£23.20 inc-VAT) per pack
32 plus packs @ £2.96 per m² / £2.13 per slab = £19.16 (£22.99 inc-VAT) per pack
40 plus packs @ £2.93 per m² / £2.11 per slab = £18.98 (£22.78 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RWA45 75mm, 6 x 0.6x1.2m = 4.32m² - ranging from £4.33 to £4.53 per m²

1 plus packs @ £4.53 per m² / £3.27 per slab = £19.59 (£23.51 inc-VAT) per pack
10 plus packs @ £4.49 per m² / £3.24 per slab = £19.41 (£23.29 inc-VAT) per pack
20 plus packs @ £4.45 per m² / £3.21 per slab = £19.24 (£23.09 inc-VAT) per pack
30 plus packs @ £4.41 per m² / £3.18 per slab = £19.07 (£22.88 inc-VAT) per pack
40 plus packs @ £4.37 per m² / £3.15 per slab = £18.89 (£22.67 inc-VAT) per pack
50 plus packs @ £4.33 per m² / £3.12 per slab = £18.72 (£22.46 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RWA45 100mm, 4 x 0.6x1.2m = 2.88m² - ranging from £5.42 to £5.67 per m²

1 plus packs @ £5.67 per m² / £4.09 per slab = £16.34 (£19.61 inc-VAT) per pack
10 plus packs @ £5.63 per m² / £4.05 per slab = £16.20 (£19.44 inc-VAT) per pack
20 plus packs @ £5.58 per m² / £4.02 per slab = £16.06 (£19.27 inc-VAT) per pack
30 plus packs @ £5.52 per m² / £3.98 per slab = £15.91 (£19.09 inc-VAT) per pack
40 plus packs @ £5.48 per m² / £3.94 per slab = £15.77 (£18.92 inc-VAT) per pack
50 plus packs @ £5.42 per m² / £3.91 per slab = £15.62 (£18.74 inc-VAT) per pack

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple slabs... 16 x 0.6x1.2m = 11.52m² - in this instance, there are 10 x slabs in a pack where each slab is 0.6m x 1.2m providing a total coverage of 11.52m² per pack.

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW3 25mm, 16 x 0.6x1.2m = 11.52m² - ranging from £2.04 to £2.14 per m²

1 plus packs @ £2.14 per m² / £1.54 per slab = £24.62 (£29.54 inc-VAT) per pack
6 plus packs @ £2.12 per m² / £1.53 per slab = £24.40 (£29.28 inc-VAT) per pack
12 plus packs @ £2.10 per m² / £1.51 per slab = £24.18 (£29.02 inc-VAT) per pack
18 plus packs @ £2.08 per m² / £1.50 per slab = £23.96 (£28.75 inc-VAT) per pack
24 plus packs @ £2.06 per m² / £1.48 per slab = £23.75 (£28.50 inc-VAT) per pack
30 plus packs @ £2.04 per m² / £1.47 per slab = £23.53 (£28.24 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW3 50mm, 8 x 0.6x1.2m = 5.76m² - ranging from £3.77 to £3.95 per m²

1 plus packs @ £3.95 per m² / £2.84 per slab = £22.73 (£27.28 inc-VAT) per pack
6 plus packs @ £3.91 per m² / £2.82 per slab = £22.53 (£27.04 inc-VAT) per pack
12 plus packs @ £3.88 per m² / £2.79 per slab = £22.33 (£26.80 inc-VAT) per pack
18 plus packs @ £3.84 per m² / £2.77 per slab = £22.13 (£26.56 inc-VAT) per pack
24 plus packs @ £3.81 per m² / £2.74 per slab = £21.92 (£26.30 inc-VAT) per pack
30 plus packs @ £3.77 per m² / £2.72 per slab = £21.72 (£26.06 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW3 75mm, 6 x 0.6x1.2m = 4.32m² - ranging from £5.59 to £5.84 per m²

1 plus packs @ £5.84 per m² / £4.21 per slab = £25.25 (£30.30 inc-VAT) per pack
6 plus packs @ £5.79 per m² / £4.17 per slab = £25.03 (£30.04 inc-VAT) per pack
12 plus packs @ £5.74 per m² / £4.13 per slab = £24.80 (£29.76 inc-VAT) per pack
18 plus packs @ £5.69 per m² / £4.10 per slab = £24.58 (£29.50 inc-VAT) per pack
24 plus packs @ £5.64 per m² / £4.06 per slab = £24.36 (£29.23 inc-VAT) per pack
30 plus packs @ £5.59 per m² / £4.02 per slab = £24.13 (£28.96 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW3 100mm, 4 x 0.6x1.2m = 2.88m² - ranging from £7.46 to £7.80 per m²

1 plus packs @ £7.80 per m² / £5.62 per slab = £22.47 (£26.96 inc-VAT) per pack
6 plus packs @ £7.73 per m² / £5.57 per slab = £22.27 (£26.72 inc-VAT) per pack
12 plus packs @ £7.66 per m² / £5.52 per slab = £22.07 (£26.48 inc-VAT) per pack
18 plus packs @ £7.59 per m² / £5.47 per slab = £21.87 (£26.24 inc-VAT) per pack
24 plus packs @ £7.52 per m² / £5.42 per slab = £21.67 (£26.00 inc-VAT) per pack
30 plus packs @ £7.46 per m² / £5.37 per slab = £21.48 (£25.78 inc-VAT) per pack

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple slabs... 8 x 0.6x1.2m = 5.76m² - in this instance, there are 8 x slabs in a pack where each slab is 0.6m x 1.2m providing a total coverage of 5.76m² per pack.

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW5 25mm, 8 x 0.6x1.2m = 5.76m² - ranging from £3.66 to £3.83 per m²

1 plus packs @ £3.83 per m² / £2.76 per slab = £22.07 (£26.48 inc-VAT) per pack
12 plus packs @ £3.80 per m² / £2.74 per slab = £21.88 (£26.26 inc-VAT) per pack
24 plus packs @ £3.76 per m² / £2.71 per slab = £21.68 (£26.02 inc-VAT) per pack
36 plus packs @ £3.73 per m² / £2.69 per slab = £21.49 (£25.79 inc-VAT) per pack
48 plus packs @ £3.70 per m² / £2.66 per slab = £21.29 (£25.55 inc-VAT) per pack
60 plus packs @ £3.66 per m² / £2.64 per slab = £21.10 (£25.32 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW5 50mm, 4 x 0.6x1.2m = 2.88m² - ranging from £6.93 to £7.26 per m²

1 plus packs @ £7.26 per m² / £5.23 per slab = £20.90 (£25.08 inc-VAT) per pack
12 plus packs @ £7.19 per m² / £5.18 per slab = £20.71 (£24.85 inc-VAT) per pack
24 plus packs @ £7.13 per m² / £5.13 per slab = £20.53 (£24.64 inc-VAT) per pack
36 plus packs @ £7.06 per m² / £5.09 per slab = £20.34 (£24.41 inc-VAT) per pack
48 plus packs @ £7.00 per m² / £5.04 per slab = £20.16 (£24.19 inc-VAT) per pack
60 plus packs @ £6.93 per m² / £4.99 per slab = £19.97 (£23.96 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW5 75mm, 3 x 0.6x1.2m = 2.16m² - ranging from £10.39 to £10.88 per m²

1 plus packs @ £10.88 per m² / £7.83 per slab = £23.49 (£28.19 inc-VAT) per pack
12 plus packs @ £10.78 per m² / £7.76 per slab = £23.28 (£27.94 inc-VAT) per pack
24 plus packs @ £10.68 per m² / £7.69 per slab = £23.07 (£27.68 inc-VAT) per pack
36 plus packs @ £10.58 per m² / £7.62 per slab = £22.86 (£27.43 inc-VAT) per pack
48 plus packs @ £10.49 per m² / £7.55 per slab = £22.66 (£27.19 inc-VAT) per pack
60 plus packs @ £10.39 per m² / £7.48 per slab = £22.45 (£26.94 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Building Slab RW5 100mm, 2 x 0.6x1.2m = 1.44m² - ranging from £13.81 to £14.45 per m²

1 plus packs @ £14.45 per m² / £10.41 per slab = £20.81 (£24.97 inc-VAT) per pack
12 plus packs @ £14.32 per m² / £10.31 per slab = £20.62 (£24.74 inc-VAT) per pack
24 plus packs @ £14.19 per m² / £10.22 per slab = £20.44 (£24.53 inc-VAT) per pack
36 plus packs @ £14.07 per m² / £10.13 per slab = £20.26 (£24.31 inc-VAT) per pack
48 plus packs @ £13.94 per m² / £10.04 per slab = £20.07 (£24.08 inc-VAT) per pack
60 plus packs @ £13.81 per m² / £9.95 per slab = £19.89 (£23.87 inc-VAT) per pack

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.
Product Availability Excellent Generally 1 or 2 days for delivery
Product Availability Good Generally 1 to 5 days for delivery
Product Availability Fair Generally 5 to 10 days for delivery
Product Availability Poor Generally 5 to 15 days for delivery
Product Availability Undetermined 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

Thermal Resistance

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.

Product Thickness Thermal Resistance kg/m³
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
Product Thickness Thermal Resistance 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
Product Thickness Thermal Resistance kg/m³
Rockwool RW4 50mm 50mm 1.47 m²K/W 80 kg/m³
Rockwool RW4 75mm 75mm 2.2 m²K/W 80 kg/m³
Product Thickness Thermal Resistance 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
Product Thickness Thermal Resistance 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
Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here