100mm Rockwool Insulation RWA45 2.88m2

100mm Rockwool Insulation RWA45 is a premium semi-rigid, resin-bonded stone wool slab engineered to deliver thermal, acoustic, and fire insulation in a single, versatile product. Suitable for residential, commercial, and industrial projects, it is the go-to mineral wool slab for builders, contractors, and serious DIYers who need a certified, multi-purpose insulant. With a thermal conductivity of just 0.035 W/mK and an A1 Euroclass fire rating, it meets the highest standards demanded by UK Building Regulations.

Key Features and Specifications

• Material: High-quality resin-bonded rock mineral wool (stone wool)
• Thickness: 100mm
• Slab dimensions: 1200mm × 600mm
• Pack contents: 4 slabs per pack
• Pack coverage: 2.88 m²
• Density: 45 kg/m³
• Thermal conductivity (Lambda): 0.035 W/mK
• Fire classification: Euroclass A1 non-combustible — BS EN 13501-1 (melting point above 1000°C)
• Product certification: CE marked to EN 13162
• Water repellent: Yes — rot and mould resistant
• Non-directional fibre structure for consistent acoustic absorption in all orientations
• Zero Ozone Depletion Potential (ODP) and Global Warming Potential (GWP)

Applications

• Partition walls and stud walls — slots neatly between 600mm-centred studs with minimal cutting
• Separating floors and floor joists — reduces airborne and impact noise between storeys
• Ceilings and ceiling voids — ideal for loft conversions and flat-roof builds
• Pitched and flat roofs — thermal and fire protection within the roof envelope
• Commercial and industrial spaces — plant rooms, boiler rooms, and ventilation enclosures
• Acoustic upgrades — party walls, home studios, and cinema rooms

Why Choose This Product

The 100mm Rockwool Insulation RWA45 is widely recognised as the market-leading acoustic insulation slab in the UK, specified by acoustic flooring manufacturers and trusted by trade professionals on projects of every scale. Its 3-in-1 thermal, acoustic, and fire performance eliminates the need for separate products, saving time and cost on site. The semi-rigid, lightweight slabs are easy to handle, cut with a standard knife, and install without specialist tools — making them equally suited to trade quantities and single-pack DIY purchases.

Delivery in and Around London

We deliver 100mm Rockwool RWA45 insulation slabs across London and the surrounding region, including inner boroughs such as Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas including Enfield, Bexley, Redbridge, and Barnet. We also supply trade and DIY customers throughout the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Trade quantities and pallet orders are welcome — contact us for bulk pricing and scheduled delivery slots.