Rockwool RWA45 Mineral Wool Thermal And Acoustic Insulation Slab

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product brand
Brand: Rockwool
Country of Manufacture: United Kingdom
In Stock
Product Code: RWRWA
Est. Delivery: 2-3 Working Days
Shipping cost displayed in basket
£27.85 (ex VAT)
£33.42 (incl VAT)

Rockwool RWA45 Insulation Slabs

These insulation batts from Rockwool with their versatile application and dual-use for Thermal Insulation and Acoustic Insulation, have made this product a buy insulation online favourite.

RWA45 is well known for not only its excellent thermal insulation but also its acoustic insulation properties as well. It offers superior fire resistance as it is non-combustible, making your home or building that little bit safer. 

Use RWA45 as wall insulation, and you will actually be able to relax whilst your kids are belting out "Let it go” or "We don't talk about Bruno" loudly in the next room on repeat. 

Once installed, RWA45 will improve the comfort of your life in more ways than one.

When used as its main application which is wall insulation, RWA45 adds mass to the wall construction, thus soundproofing them. It has a low K-value of 0.035 W/mK high density, hence why they are considered dual-use.

They are also used for insulation in roofs, between rafters, insulation in loft floors, plus in many other applications. It is a very versatile product.

RWA45 does not release harmful fibres or gases into the air as it is made of rock mineral wool which is securely bonded together with adhesive. They are long-lasting, and their performance remains unaffected by time i.e they do not slump as would say cellulose insulation. These acoustic insulation slabs are long-lasting, and durable and do not show any change in performance over time.

Rockwool insulation repels water, which means moisture-related problems like moulds, don't tend to be an issue with this product.

Made in the UK to high standards its been used on high-profile projects such as The Royal Academy for Music, as detailed here on Rockwool's website.

Rockwool RWA45 is a versatile and robust insulation solution for a wide range of building projects. The high-quality resin bonded slabs can be used for thermal, acoustic and fire-resistant insulation in general building applications as well as specialist specifications such as commercial, leisure, industrial buildings and more.

The multi-use thermal and acoustic insulation slabs are lightweight, rot-proof and easy to handle and install. They are water-repellent, durable and cost-effective. Rockwool acoustic insulation slabs are non-combustible and have the highest possible rating A1 by Euroclass. They do not promote the growth of moulds or vermin. 

Product Specifications:

Length: 1200mm 

Width: 600mm


Pieces per pack

Pack Coverage (m2)























  • Rockwool acoustic, thermal and fire insulation slabs can be applied to an array of general building applications.
  • RWA45 is used to insulate internal partition walls, above and below rafters, ceilings and floors.

Key Features:

  • Acoustic insulation slabs offer excellent thermal, acoustic and fire performance.
  • Insulation slabs are easy to handle and install. 
  • Acoustic insulation slabs by Rockwool are cost-effective.
  • Rockwool RWA45 is highly water repellent and non-hygroscopic.
  • Soundproof insulation resists high temperatures.
  • Acoustic insulation slabs do not promote the growth of vermin or moulds.
  • Rated Euroclass A1 non-combustible, RWA45 offers the highest level of fire resistance.
  • Durable insulation from Rockwool will maintain high performance over the lifetime of the building.  
  • Acoustic insulation batts can be easily cut to size. They are easy to install.
  • Once installed, RWA45 acoustic insulation slabs do not require maintenance.

Average Customer Rating
Overall 5.0

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