Rockwool RW5 100mm x 600mm x 1200mm Acoustic Insulation 1.44m2

£38.92 £32.43
In stock
Product Description

Rockwool RW5 100mm is a durable 3-in-1 insulation solution with acoustic, thermal, and fire performance. It is available in a range of thicknesses and densities so you can find the perfect size for your insulation needs. The multi-use solution is ideal for easy application throughout construction.

Rockwool RW5 has a density of 100kg m3.

Size: 600mm x 1200mm

Pack: 2 Slabs

Other available thicknesses: 50mm & 75mm

We are happy to help with enquiries, stock availability or any technical help you require, however for security reasons we cannot take orders over the phone. So if you need to chat give us a call on 03301231761 or email us at [email protected].

What is Rockwool RW5 100mm?

Rockwool RW5 100mm are produced with high-quality resin-bonded, semi-riding insulation slabs. They are a durable solution to achieve thermal, acoustic, and fire performance. Rockwool is a market-leading brand which offers cost-effective and easy-to-install products designed from rock mineral wool. The versatile Rockwool RW5 100mm has been rated A1 on the Euroclass scale, which is the highest possible rating and means they are non-combustible. 


RW5 100mm doesn’t degrade over time and is water resistant, so you don’t need to worry about damp or rot. They achieve lambda 0.034 W/mK and can be bought in five standard thicknesses from 25-150mm.

Features and benefits of Rockwool RW5 100mm:

  • Rockwool RW5 100mm insulation slabs offer excellent thermal, acoustic, and fire performance.
  • Easy to handle and install.
  • Rated Euroclass A1 non-combustible, offering the highest level of fire resistance.
  • A durable insulation solution which will maintain high performance over the lifetime of the building.
  • The water-repellent qualities of the insulation prevent moisture buildup, damp, and rot.

Applications for Rockwool RW5 100mm:

  • Internal timber or steel partition walls
  • Internal timber frame floors
  • Internal timber frame ceilings
  • Ceilings
  • Partition panels
  • Party walls

Need to know what to do when water pipes run between floor joists? We also have a guide about Rockwool insulation and how it is made.

Data Sheet (1.63 MB)
Data Sheet (1.64 MB)
Customer Questions
Do the Rockwool acoustic slabs also provide thermal insulation?
The Rockwool RW5 is a good thermal insulator with a thermal conductivity of 0.034 W/mK.
Is Rockwool eco-friendly?
Rockwool is a mineral wool product manufactured within the UK from natural volcanic rock. The benefit of using insulation is that it reduces energy consumption.
Does Rockwool get mouldy?
Damp and mould will affect the structural integrity of a building, as well as causing possible respiratory health issues. Rockwool is naturally resistant to rot, mildew, mould, and bacterial growth. If the product gets wet though, it should be air dried before installation.
What is the dB for the 100mm Rockwool slab?
The general dB for the Rockwool RW5 100mm is around 40-50dB. We have attached the data sheet on the product page to have a look at. 
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More Information
Supplier Part Number181200
Pack Size2
Size600mm x 1200mm

Orders and Delivery

Free delivery if your order is over £300 ex VAT. Orders between £100 - £300 ex VAT will be subject to a delivery charge of £50 ex VAT. Please note, we are unable to accept orders less than £100 ex VAT

When ordering on line you can specify the date of delivery, however we would not be able to specify the time of delivery on that day.

• Please note that we have a number of large vehicles, including articulated vehicles that may be used for delivery. Please advise us in the comments on your order if access to the delivery address is limited.

• Due to insurance guidelines, delivery personnel are unable to enter private residences. Delivery will be as far as possible to the kerbside of the delivery address. The recipient of the products is responsible for any additional lifting once the delivery has been made. Please bear in mind that Insulation products can be bulky and / or heavy.

• The delivery driver will require a signature to confirm the goods have been received.

 † Unfortunately we, Insulation Express, cannot deliver to the Highlands & Islands of the UK. However we will be happy to deliver to a freight forwarding company on your behalf.


Returns and Refunds

In the unlikely event that you need to return an item, please contact our team on [email protected] within 14 days of accepting delivery of the item.

Restocking charges may apply. We will discuss this with you upon receipt of the cancellation request. Restocking charges will be applied where the products are no longer required AND NOT for goods returned because either defective or damaged.

We usually charge 30% of value (minimum £25.00).

Please note that we cannot accept returns on special orders. Special orders may consist of items sent via third party shipping companies or made to measure products. If you are unsure on whether or not your item is a special order, please contact us on [email protected] prior to placing the order.

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