Rockwool RWA45 50mm x 600mm x 1200mm Acoustic Insulation 6.48m2

£31.74 £26.45
In stock
Product Description

Developed for thermal, acoustic and fire protection applications, we offer ROCKWOOL RWA45 in a wide selection of construction types to suit your needs. RWA45 50mm is made using a range of high-quality resin-bonded slabs in different densities and thicknesses.

Rockwool RWA 45 has a density of 45kg m3

Size: 600mm x 1200mm

Pack: 9 Slabs

Other available thicknesses: 30mm, 75mm & 100mm

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 RWA45 50mm?


Designed for application on a range of general buildings, 

Rockwool RWA45 is a 50mm lightweight and semi-rigid thermal, acoustic, and fire-resistant insulation slab idea for a range of construction types. RWA45 50mm is made using high-quality resin-bonded slabs in a variety of thicknesses and densities. 


Our range of ROCKWOOL 50mm slabs can be applied to an array of general building applications for acoustic and thermal insulation of partition walls, ceilings, floors and roofs. The multi-use solution is well suited for easy application throughout construction.


RWA45 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RWA45 50mm in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RWA45 insulation slabs achieve Lambda 0.035 W/mK.


Features and benefits of Rockwool RWA45 50mm:


  • Excellent thermal, acoustic and fire protection
  • The slabs are easy to handle and install
  • Euroclass A1 is non-combustible and offers the highest level of fire resistance
  • Durable insulation solution that maintains high performance over the building lifetime
  • Water repellent qualities prevent moisture build-up, damp, and rot

Applications for Rockwool RWA45 50mm:


  • Acoustic and fire insulation for partitions and ceilings.
  • Thermal insulation for floors, walls, and roofs.


For more information, please read our guide on Rockwool insulation and how it is made as well as how to double layer Rockwool products.

Data Sheet (1.63 MB)
Data Sheet (1.64 MB)
Customer Questions
I have a ceiling approx 18m2, how many packs will I need of the 50mm?
Rockwool RWA45 50mm contains 9 slabs which will cover 6.48m2. So to cover 18m2, you will require 3 packs (19.44m2 in total). This will allow extra for wastage/cutting during installing.
Why is the 50mm RWA45 more expensive than the 100mm?
The Rockwool RWA45 products are sold in pack quantities and priced per pack. The volume of the 50mm (9 slabs) is greater than the 100mm (4 slabs) which is the reasoning for the price.
What is the difference between the RWA45, the RW3 and the RW5?
All three Rockwool products are made of the same material, with the difference being how tightly the fibres are compacted and how dense they are. The RWA45 has a density of 45kg m3, RW3 60kg m3 and RW5 100kg m3. Generally for domestic use the RWA45 is recommended, with the more dense slabs for industrial or particularly noisy areas.
Can this be easily cut to shape?
This product can easily be cut to shape using an insulation saw, or knife with a serrated blade. Try not to over cut the insulation, and allow an extra 10mm on both dimensions (width and length) of the insulation, over and above the aperture dimensions.
I want to install insulation to an external wall and render, although it would seem that i would need to construct a frame first unlike the rigid insulation such as Celotex is that correct?
Yes that is correct, the RWA45 Rockwool slabs need to be installed within a steel/timber frame. 
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More Information
Supplier Part Number181176
Pack Size9
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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