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View Product Reviews50mm Rockwool RWA45 Acoustic Sound Insulation Slab (6.48m2/Pack)
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Multi-application stone wool slab with strong all-round acoustic, thermal, and fire performance. Suitable for walls, floors, and roofs. 50mm is ideal for sound absorption in stud walls and floors.
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Mon 29 Sep
- 1days
- 21hrs
- 59mins
- 36secs
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Product Overview
Multi-application stone wool slab with strong all-round acoustic, thermal, and fire performance. Suitable for walls, floors, and roofs. 50mm is ideal for sound absorption in stud walls and floors.
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 £300 | £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}} 45kg/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: | RWA45 |
|---|---|
| Material Type: | Rock Mineral |
| Thickness: | 50mm |
| Width: | 600mm |
| Length: | 1200mm |
| Pieces Per Pack: | 9 |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 6.48m2 |
| Brand: | Rockwool |
| Manufacturer's Reference: | 181176 |
| Thermal Conductivity: | 0.035W/mK |
| Density: | 45kg/m3 |
| Fire Rating: | A1 Non-Combustible |
Technical Downloads
Product Overview
Stone wool insulation slab, measuring 50mm in thickness, designed for use in internal partitions, floors, and roof applications.
Manufactured from high-density stone wool, the slab combines excellent acoustic absorption with reliable thermal insulation and inherent fire resistance.
Its rigid composition allows a close friction fit between studs or joists, preventing gaps that could compromise performance.
Non-combustible and classified as Euroclass A1, the slab contributes to improved fire safety within the building fabric. Its fibre structure also provides effective sound reduction, limiting noise transfer between rooms and floors.
At 50mm thick, this slab is suited to lightweight partitions and areas where space is limited but effective sound control and fire resistance are still required.
It is often used in domestic walls, ceilings, and floors where moderate acoustic performance is sufficient without increasing wall or floor build-up depth.
Features & Benefits
- Euroclass A1 fire classification: Non-combustible in accordance with BS EN 13501-1.
- Stone wool mineral slab: Naturally resistant to rot, fungal decay, and insect attack.
- Square-cut edges: Butt together cleanly for continuous insulation layers.
- Porous fibre structure: Absorbs sound energy, reducing noise transfer through walls and floors.
- Semi-rigid slab: Simple to shape with a knife and friction-fit between studs or joists.
- Thermal conductivity 0.035 W/m·K: Helps maintain building energy efficiency.
- Sustainable manufacture: Made from natural volcanic rock, recyclable, zero ODP/GWP.
- 50mm thickness: Common choice for stud walls and floor assemblies.
Applications
- Standard stud walls: Reliable option for reducing airborne sound.
- Intermediate floor assemblies: Improves separation between rooms above and below.
- Ceilings in residential or office spaces: Reduces noise transfer effectively.
- Drylined linings and partitions: Provides combined thermal and acoustic insulation.
Installation Guidance
- Cut accurately with knife or insulation saw: Ensures a close friction fit.
- Fit slabs snugly with no gaps: Maintains fire and acoustic integrity.
- Wear gloves and protective clothing: Prevents irritation from mineral fibres.
Compliance & Performance
- Thermal conductivity: Declared 0.035 W/m·K (EN 13162).
- Fire performance: Euroclass A1 non-combustible (BS EN 13501-1).
- Certification: CE and Key marked to BS EN 13162:2012 + A1:2015.
- Acoustic standards: Supports compliance with Approved Document E (England & Wales), Section 5 (Scotland), and BB93 (schools).
- Marine/offshore certification: Lloyd’s Register approved as non-combustible.
Customer Reviews
The team at Materials Market offered an extensive product range and I chose this after learning RW5 had a later delivery date. The RWA45 is great at preventing sound waves.
This rockwool insulation was great at absorbing all the sounds from the neighbours. It's a mineral wool insulation so also non-combustible. Can sleep safely at night knowing it's not a fire hazard.
Does exactly what it's suppose to do, reduce the noise from my kitchen!
amazing
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