Rockwool RWA45 Acoustic Insulation Slab (7 Products)

What Are Rockwool RWA45 Insulation Slabs?

When the day is done and you’re all wrapped up with work, you deserve to come home to a quiet and relaxing space. RWA45 slabs are designed to stop the transfer of sound and heat from one space to another, making them an ideal choice for use in residential buildings such as home offices, studios, bedrooms and anywhere else you want to get the silent treatment. At Materials Market, we stock Rockwool’s most popular insulation slab to date; the RWA45 Acoustic Insulation Slab 1200 x 600.

The fact that RWA45 insulation is made from mineral wool makes it a naturally renewable and sustainable material; so it gets a big green thumbs-up for its environmental credentials. Another perk of the slab's inorganic composition is that it provides it with water repellent qualities which prevent moisture build-up, dampness and rot.

These high-quality acoustic and thermal insulation resin bonded slabs offer excellent thermal, acoustic and fire performance and are also as easy to fit as they are to handle. The 1200mm x 600mm slabs can be cut into shape with a serrated blade. As the texture is quite similar to a loaf of bread, the slabs can actually be cut with a bread knife (given it has a serrated blade) - but for legal reasons, and the taste of your next sandwich, just make sure you give the knife a good wash before using it on actual bread.

These high-quality resin bonded slabs also achieve the highest level of fire performance with an outstanding A1 non-combustible rating in accordance with BS EN 13501-1.

What Are Rockwool RWA45 Acoustic Insulation Slabs Made From?

The production process for Rockwool essentially emulates the inside of a volcano that spins and cools lava in a controlled environment. Rockwool insulation is created by spinning molten rock and minerals with steel slag to create a cotton-candy-like wool product.

What Does RWA45 Mean?

RWA45 is the name that Rockwool gives to their most popular acoustic insulation slab. The RW stands for “Rockwool”, A stands for “Acoustic” and the 45 refers to the fact that these slabs have a density of 45kg/m3 and 0.035 W/mK thermal conductivity. You will see that there is more than one product on our site labelled RWA45. All slabs are essentially the same product, just with varying thicknesses. Our 25mm Rockwool RWA45 acoustic sound insulation slab (16 slabs per pack) is the same as our 100mm Rockwool RWA45 acoustic sound insulation slab (4 slabs per pack), only it is not as thick, and therefore will not provide the same level of soundproofing.

You can read more about these materials on Rockwool RWA45 data sheets, which you can find under ‘Technical Downloads’ on each product page.

Rockwool RWA45 Acoustic Insulation Slab Thickness

The RWA45 product range consists of different thicknesses to suit every kind of project. Our customers can choose slabs in a variety of thicknesses; 25mm (11.52m2 pack), 50mm (6.48m2 pack), 75mm (4.32m2 pack), and 100mm (2.88m2 pack). These thicknesses are indicative of the slab before it has been installed. As these slabs are semi-rigid, they can be compressed to fit into tighter spaces, e.g. partition walls or floor space. In practice, these semi-rigid slabs can compress by up to 10% of their starting thickness.

Always consult with a professional tradesperson to assess which thickness is most suitable.

Benefits of Rockwool RWA45 Slabs

Rockwool has over 80 years of experience manufacturing stone wool products, making them trusted experts in their field. They first introduced their thermal acoustic and fire insulation solution to the market way back in 1962.

One of the main benefits of using Rockwool insulation slabs is that they do not require any maintenance. Once you have installed the slab, you do not need to tend to them in any way - you can just simply slot them in and leave them be. And seeing as the semi-rigid slabs are made from long-lasting, water repellent materials, you can sleep easy – and dryly! – at night.

Another benefit of using Rockwool's high-quality resin bonded slabs is their A1 classification on the Euroclass scale. Euroclass A1 non-combustible is the best classification that insulation materials can achieve for combustibility and fire performance.

There are also Rockwool slabs with aluminium foil facings available, as well as black or white tissue. However, these come at an additional cost. Feel free to get in touch with our customer service team and they'll be happy to help you with specialist orders.