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Rockwool RW3 100mm Insulation 600x1200mm 2.88m2
£42.00 inc vat
More sizes of this item can be found here:
- Description
Description
Rockwool RW3 100mm Insulation 600x1200mm 2.88m2
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
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Thickness: 100 mm — deeper build-up for maximum performance
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Panel size: 1,200mm × 600mm (standard slab size)
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Coverage per pack: ~2.88 m² (4 slabs)
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Nominal density: ~60kg/m³
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Thermal conductivity: 0.034 W/m·K (λD)
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Fire rating: Euroclass A1 (non-combustible)
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Material: Stone wool (rock mineral wool) — naturally fire-resistant, water-repellent and durable
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Excellent acoustic performance: Designed to absorb airborne sound and reduce noise transfer
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Multi-application: Suitable for partitions, ceilings, floors and roofs — new build or refurbishment
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Easy installation: Semi-rigid format, cut to size, friction-fit or secure in cavity to minimise gaps
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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.
Contact us today for more information on 0113 204 7303 or contact us here.
