Description

Rockwool RW3 50mm Insulation 600x1200mm 4.32m2

The Rockwool RW3 75mm acoustic sound insulation slab is a premium stone wool insulation solution designed to deliver standout performance in acoustic, thermal and fire protection applications. With a thickness of 75mm, it offers enhanced insulation depth, making it perfect for build-ups where deeper cavities or enhanced acoustic separation is required. Each panel size is approximately 1200mm × 600mm, ensuring compatibility with standard studwork, ceiling grids and floor voids.

Manufactured with a nominal density of ~60 kg/m³, the RW3 range delivers excellent sound absorption thanks to its open-fibre stone wool construction. This allows the slab to both absorb airborne noise and dampen vibration, making it ideal for separating walls, ceilings, floors, media rooms or any space where sound control matters.

On the thermal front, the RW3 slabs achieve a thermal conductivity of 0.034 W/mK (λD) — meaning the 75mm thickness adds substantial insulation value, reducing heat loss and boosting energy efficiency.

Safety is built-in: the product is rated Euroclass A1 (non-combustible) under BS EN 13501-1, providing high fire resistance and making it suitable for compartmentation and other fire sensitive applications.

Installation is streamlined: the semi-rigid slabs fit neatly into cavities and can be friction-fitted or secured between studs, joists or rafters. Trimming is straightforward, and the stone wool composition ensures dimensional stability — the slab maintains shape, thickness and performance over time, giving confidence in long-term results.

Whether you’re working on commercial partitions, high-spec residential refurbishments or acoustic upgrade programmes where depth is available for stronger performance, the Rockwool RW3 75mm slab is a reliable choice. With a trusted brand behind it and full spec performance, you’re offering your customers something they can trust.

Key Features

• Thickness: 75mm — deeper cavity build-up for enhanced acoustic and thermal effect

• Panel size: approximately 1200mm × 600mm (standard board size)

• Nominal density: ~60 kg/m³ — delivers robust insulation structure

• Thermal conductivity: 0.034 W/mK (λD) — high thermal resistance

• Fire classification: Euroclass A1 (non-combustible) — maximum fire safety rating

• Material: stone wool (rock mineral wool) — durable, rot-resistant, dimensionally stable

• Excellent acoustic performance: reduces airborne sound and dampens vibrations

• Suitable for partitions, ceilings, floors, separating walls, new build or refurb

• Easy to install: semi-rigid, cut to size, friction fit or secure in cavity

• Long-term performance: retains shape, thickness and insulation properties over life of building

If you require an extremely high performing, easy to handle multi-application insulation, this product is perfect for the job. If you require a high volume of this product – please contact us for a quote.

Contact us today for more information on 0113 204 7303 or contact us here.