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75mm Rockwool RW3 Acoustic Sound Insulation Slab (4.32m2/Pack)
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High-density stone wool slab with strong thermal and fire performance and enhanced acoustic properties. Provides high sound absorption for offices, apartments, and high-spec internal partitions.
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Mon 29 Sep
- 0days
- 9hrs
- 11mins
- 23secs
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Product Overview
High-density stone wool slab with strong thermal and fire performance and enhanced acoustic properties. Provides high sound absorption for offices, apartments, and high-spec internal partitions.
Delivery & Returns Information
How Our Delivery Works
We work with a nationwide network of trusted suppliers. As a result, items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you'll see multiple delivery charges at checkout. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £100 | £15 ex. VAT |
| Between £100 - £300 ex. VAT | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
| Screws & Fixings and Adhesives & Sealants | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{home}} Use in ceilings, walls and floors
- {{local_fire_department}} A1 non-combustible
- {{density_medium}} 60kg/m3 density
- {{volume_off}} Excellent acoustic and thermal performance
- {{build}} 600mm width to fit between studwork
- {{public}} Zero Ozone Depletion Potential (ODP)
Technical Specification
| Product: | RW3 |
|---|---|
| Material Type: | Rock Mineral |
| Thickness: | 75mm |
| Width: | 600mm |
| Length: | 1200mm |
| Pieces Per Pack: | 6 |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 4.32m2 |
| Brand: | Rockwool |
| Manufacturer's Reference: | 181185 |
| Thermal Conductivity: | 0.034W/mK |
| Density: | 60kg/m3 |
| Fire Rating: | A1 Non-Combustible |
Technical Downloads
Product Overview
Stone wool insulation slab, measuring 75mm in thickness and cut to 1200 × 600mm, for use in partitions, ceilings, and floors.
Manufactured at a density of 60 kg/m³, the slab combines dependable acoustic absorption, effective thermal insulation, and inherent fire resistance.
Its semi-rigid composition ensures straightforward installation, while maintaining a close fit to limit gaps that could compromise performance.
Non-combustible and classified to the highest fire safety standards, the slab contributes to enhanced fire protection within the building fabric. Its fibre structure also provides strong airborne sound reduction, improving acoustic comfort between rooms and floors.
At 75mm thick, the slab delivers enhanced levels of acoustic and thermal performance compared to thinner options in the range.
It is well suited to partitions, floors, and ceilings where stronger sound control, greater energy efficiency, and added fire resilience are required without moving up to the full depth of 100mm.
Features & Benefits
- A1 non-combustible fire rating (BS EN 13501-1): Meets UK and Ireland Building Regulations for non-combustible materials.
- Stone wool material: Naturally resists rot, fungal decay, and insect attack for long-term durability.
- 60kg/m³ density: Provides rigidity for friction fitting and reliable acoustic performance.
- Semi-rigid slab format: Fits neatly between studs, joists, and rafters.
- Open-fibre structure: Provides excellent sound absorption for reduced noise transfer.
- Easily cut to size: Allows straightforward installation around services and fixtures.
- Slab size 1200 x 600mm: Standard board dimensions suit common stud spacings.
- 75mm thickness: Delivers strong noise control for higher-spec residential or commercial applications.
Applications
- Stud partitions: Enhances sound reduction between rooms, meeting Approved Document E requirements.
- Ceiling upgrades: Improves airborne sound insulation in residential or commercial builds.
- Floor voids: Adds acoustic performance to timber floors, reducing impact and airborne sound.
- Service risers and enclosures: Provides fire and acoustic protection in building services applications.
Installation Guidance
- Friction fit between studs/joists: Ensures slabs stay securely in place without gaps.
- Cut with insulation saw or knife: Achieves accurate fitting around pipes, sockets, and structural details.
- Protect from moisture during install: Maintain insulation performance by keeping slabs dry until enclosed.
Compliance & Performance
- Euroclass A1 non-combustible (BS EN 13501-1): Complies with Building Regulations requirements for non-combustible materials in internal partitions, floors, and ceilings.
- CE marked to BS EN 13162: Factory-made mineral wool insulation, tested for thermal conductivity (0.034 W/mK) and acoustic absorption performance.
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