Provide thermal, acoustic, and fire protection across your building projects with Rockwool RWA45 insulation slabs, supplied in a 1200 x 600 x 25mm size. Manufactured from durable stone mineral wool to a 45kg/m3 density, these general building slabs conform to BS EN 13162:2012 standards for factory-made mineral wool products.

Offering a thermal conductivity of 0.035 W/m.K, the slabs deliver dependable heat retention alongside effective acoustic absorption. Holding a Euroclass A1 non-combustible classification, they ensure maximum fire safety within building structures.

These versatile slabs are designed for use across walls, ceilings, floors, and roofs. While supplied standard, a variety of facings including black or white tissue and aluminium foil are available on request (subject to production compatibility).

• 1200 x 600 x 25mm dimensions – provides slim, dense insulation for general building assemblies
• 45kg/m3 stone mineral wool – robust density delivers acoustic absorption and structural stability
• 0.035 W/m.K thermal conductivity – reduces heat transmission across ceilings, walls, and floors
• Euroclass A1 non-combustible – delivers the highest standard of fire protection and safety
• BS EN 13162:2012 compliant – meets European standards for factory-made mineral wool slabs
• Multi-application use – ideal for acoustic, thermal, and fire protection in roofs and partitions
• Available in various thicknesses – including 50mm, 75mm, and 100mm

Delivery & Returns

Delivery: This item is delivered to the kerbside or the nearest accessible road point at your property. The driver won't be able to bring it into your property, so please make sure you can move it from there.

Due to courier restrictions, we're unable to deliver this item to the following postcodes:
Scotland: AB10–16, AB21–25, AB30–39, AB41–45, AB51–56, IV1–28, IV30–32, IV36, IV40–56, IV63, KW1–17, PA1–20, PA21–38, PA41–49, PA60–78, PA80, PH1–26, PH30–44, PH49–50
Wales: LD1–8, LL21–49, LL51–78, SA1–20, SA31–48, SA61–73, SY15–25

Returns: As this is a bulky item, unwanted returns incur a £40 collection fee (replacing our standard £9 fee). There is no charge for items that are faulty, damaged or sent in error. To arrange a collection, please contact our Customer Services team.

This item will be delivered directly by our supplier. Lead times are shown on the product and trolley pages and are always advertised in working days (Monday to Friday).

• If your order contains items stocked by us and items that come direct from the supplier, your order will be automatically split and processed accordingly.
• We will pass the details you give us, including delivery details, your email address and your phone number, to the relevant supplier.
• Most of our suppliers can deliver to any UK address. Delivery to remote or offshore postcodes may take a little longer than the advertised lead time. If the supplier cannot deliver to your postcode or we believe your order may take longer, we will try to tell you beforehand.
• Items that come direct from a supplier will be delivered by the courier chosen by the supplier. Where possible, suppliers will update you with delivery information. This may be by email, phone call or text message.
• Items delivered direct from suppliers cannot be returned through a store. You would need to return these items direct to the supplier, unused and in their original packaging, at your expense. You can arrange for most items to be collected by contacting our Customer Services team. A fee of £9* will be taken off your refund. There is no charge for faulty items being collected. *For big and bulky items, additional charges may apply.
• Please note, you cannot return bespoke or made-to-measure items unless they are faulty.