Rockwool RW3 100mm Insulation 600x1200mm 2.88m2

Name: Rockwool RW3 100mm Insulation 600x1200mm 2.88m2
Brand: Buildboard

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Details

The Rockwool RW3 100mm acoustic insulation slab is a high-performance stone-wool panel engineered for acoustic, thermal and fire protection. At 100 mm thickness with dimensions of 1,200mm × 600mm , this pack (4 slabs) covers approximately 2.88 m² . With a nominal density of ~60kg/m³ and a thermal conductivity of 0.034 W/m·K , it offers trusted insulation performance in both new build and refurbishment projects.

Certified to Euroclass A1 (non-combustible) under BS EN 13501-1, the RW3 slab provides maximum fire safety — making it suitable for demanding applications including partition walls, floors, ceilings and roofs. The semi-rigid stone wool structure allows for easy handling and cutting, and when tightly fitted between studs, joists or rafters, it helps reduce airborne sound transmission and improve thermal stability.

Whether you’re dealing with separating walls, office refurbishments, high-traffic commercial spaces or simply want the best insulation depth available in the RW3 range, the 100 mm slab ticks the boxes: optimal thickness for acoustic performance, excellent thermal value for energy efficiency, and rock-solid fire credentials. Durable, moisture-resistant and backed by the trusted Rockwool brand, it’s the kind of product your customers will trust.

Key Features

Thickness: 100 mm — deeper build-up for maximum performance

Panel size: 1,200mm × 600mm (standard slab size)

Coverage per pack: ~ 2.88 m² (4 slabs)

Nominal density: ~ 60kg/m³

Thermal conductivity: 0.034 W/m·K (λD)

Fire rating: Euroclass A1 (non-combustible)

Material: Stone wool (rock mineral wool) — naturally fire-resistant, water-repellent and durable

Excellent acoustic performance: Designed to absorb airborne sound and reduce noise transfer

Multi-application: Suitable for partitions, ceilings, floors and roofs — new build or refurbishment

Easy installation: Semi-rigid format, cut to size, friction-fit or secure in cavity to minimise gaps

Longevity: Retains shape, thickness and performance over the building’s lifetime

Technical Specifications

Spec

Value

Product

Rockwool RW3 100mm Acoustic Insulation Slab

Dimensions

1,200 mm (L) × 600 mm (W)

Thickness

100 mm

Pack Coverage

~2.88 m² (4 slabs)

Nominal Density

~60kg/m³

Thermal Conductivity (λD)

0.034 W/m·K

Fire Classification

Euroclass A1 (non-combustible)

Material

Stone wool (rock mineral wool)

Suitable Applications

Internal partitions, separating floors, ceilings, roofs, refurbishment projects

Installation

Cut to size, fit between studs/joists, avoid gaps for maximum performance

Why Choose This Product?

If you need insulation that does everything — acoustic, thermal, fire — and you’ve got the cavity depth to support a 100 mm slab, then this is the one. It’s the thickest in the standard RW3 family, providing stronger sound isolation (great for dividing walls, flats, busy offices) and better thermal retention (helping meet energy efficiency targets). Plus, the A1 fire rating gives peace of mind in regulated environments. Makes your listing easy to sell.

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.