Rockwool RW5 Acoustic Mineral Wool is a high-density insulation slab designed to absorb airborne sound and block fire spread in internal walls, floors, and ceilings. Each 1200mm x 600mm slab friction-fits between timber or steel studs without mechanical fixings.

Made from stone wool, RW5 is Euroclass A1 non-combustible, water-repellent, and vapour-permeable. It performs well in both domestic and commercial settings and supports compliance with UK acoustic and fire regulations. For guidance on fitting, refer to the Rockwool RW5 installation guide.

Key Features

Rockwool
Insulation

Rockwool RW5 Acoustic Mineral Wool is a high-density insulation slab designed to absorb airborne sound and block fire spread in internal walls, floors, and ceilings. Each 1200mm x 600mm slab friction-fits between timber or steel studs without mechanical fixings.

Made from stone wool, RW5 is Euroclass A1 non-combustible, water-repellent, and vapour-permeable. It performs well in both domestic and commercial settings and supports compliance with UK acoustic and fire regulations. For guidance on fitting, refer to the Rockwool RW5 installation guide.

Key Features

Rockwool
Insulation
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Rockwool RW5 Acoustic Mineral Wool Insulation 1200mm x 600mm

£853.40
Rockwool RW5 Acoustic Mineral Wool is a dense stone wool slab for walls, floors, and ceilings. 1200mm x 600mm. Fire-rated and sound-absorbing.

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Rockwool RW5 Acoustic Mineral Wool is a high-density insulation slab designed to absorb airborne sound and block fire spread in internal walls, floors, and ceilings. Each 1200mm x 600mm slab friction-fits between timber or steel studs without mechanical fixings.

Made from stone wool, RW5 is Euroclass A1 non-combustible, water-repellent, and vapour-permeable. It performs well in both domestic and commercial settings and supports compliance with UK acoustic and fire regulations. For guidance on fitting, refer to the Rockwool RW5 installation guide.

Key Features

  • Reduces airborne sound between rooms
  • Euroclass A1 fire-rated, non-combustible
  • Water-repellent and breathable stone wool
  • Thermal conductivity of 0.034 W/mK
  • Fits timber or steel stud partitions
  • Available in 25mm, 30mm, 50mm, 75mm, and 100mm thicknesses
  • Datasheet

Description

Rockwool RW5 Acoustic Mineral Wool is a high-density insulation slab designed to absorb airborne sound and block fire spread in internal walls, floors, and ceilings. Each 1200mm x 600mm slab friction-fits between timber or steel studs without mechanical fixings.

Made from stone wool, RW5 is Euroclass A1 non-combustible, water-repellent, and vapour-permeable. It performs well in both domestic and commercial settings and supports compliance with UK acoustic and fire regulations. For guidance on fitting, refer to the Rockwool RW5 installation guide.

Key Features

  • Reduces airborne sound between rooms
  • Euroclass A1 fire-rated, non-combustible
  • Water-repellent and breathable stone wool
  • Thermal conductivity of 0.034 W/mK
  • Fits timber or steel stud partitions
  • Available in 25mm, 30mm, 50mm, 75mm, and 100mm thicknesses
  • Datasheet

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Built for Fire Safety and Sound Control

RW5’s dense stone wool structure acts as a barrier to fire and airborne sound. It is rated Euroclass A1 and helps prevent the spread of flames and heat, while significantly reducing transmission of speech and noise between rooms.
This product is suitable for internal partitions and floors in schools, homes, offices, and industrial spaces. You can rely on its tested performance where both acoustic clarity and fire containment matter.

Fast Friction-Fit Installation

Each RW5 slab is cut to 1200mm x 600mm and designed to friction-fit between studs or joists. It holds itself in place, reducing labour time and making it easy to fit in vertical and horizontal applications.

Strong and Breathable Performance

Rockwool RW5 resists moisture and allows vapour to pass through, keeping wall cavities dry and stable. It keeps its shape and density over time, even under compression, helping maintain performance long-term.

Fits Standard UK Construction

Sized to suit typical framing systems in British builds, RW5 is ideal for residential retrofit and new builds alike. With options from 25mm to 100mm, you can tailor insulation levels without overengineering the wall space.

Backed by Rockwool Quality

Made in the UK by Rockwool, RW5 is supported by full testing, technical data, and fire certificates. Use it in compliant specifications where acoustic performance and fire safety are essential.

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Excellent 4.3 / 5
based on 983 reviews

Excellent Delivery Service

Order arrived early in morning, delivery staff were excellent and able to place order as close as possible to where I required it. excellent communication through out delivery and after delivery.

Rod Craik – 05 June

Great Experience

Great experience Really pleased with the way my order was dealt with and delivery arrived as advised.

Jim Brown – 23 May

Good product and service

Good product, reasonable price, great service and good customer follow-up. Would recommend and use again.

Gary Davies – 05 June

Great Company

Great company, great product. Delivery was very speedy and items was delivered professionally by a very helpful driver. Would highly recommend.

David Barrow – 27 May

Great quality wood and fast delivery

Great quality wood and fast delivery The company reached out to make sure that everything was good and the delivery went fine

Stephen Moseley – 31 May

Excellent service from a great company

Ordered 2T of midnight blue slate chipping (2 pallets of 50 bags each) Very nice product at a great price. Contacted quickly after order to arrange a suitable delivery date. Delivery was as arranged. Customer service is excellent including follow up call to ensure everything went well. All in all I would highly recommend Armstrong Cheshire.

Derrick Lohmann – 31 May

Great Customer Relations

Due to a mistake in communication ( mostly my mistake) the first delivery of bulk aggregate went to an address I used to live at. After asking to have a replacement delivery to the correct address Armstrong Cheshire re-scheduled the delivery within 3 days and with fantastic customer relations. I cannot recommend this company enough.

DAVID WHARTON – 20 May

Ultra Fast Delivery

Ultra fast delivery, technically superlative company, their products are light years ahead of all others. Unbelievable prices. I have been in construction for nearly 70 years now and am still working every day. This company is why I keep getting up in a morning. Thank you dear sirs/ Madam for making life easier

Anonymous – 16 June

Steel Lintel

Easy to pick product online, said 10 days delivery but got the product in 4 days, excellent service and prices

Mr. Ian Humphreys – 20 June

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