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40mm Rockwool RWA45 Acoustic Sound Insulation Slab (8.64m2/Pack)
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Tue 16 Sep
- 0days
- 22hrs
- 7mins
- 40secs
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- Choose Clearpay at checkout to pay later with Pay in 4.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Clearpay is unregulated credit. Use responsibly. 18+, T&Cs and late fees apply at clearpay.co.uk/en-GB
Clearpay lends you a fixed amount of credit so you can pay for your purchase over 4 instalments, due every 2 weeks. Ensure you can make repayments on time. You must be 18+ and a permanent UK resident (excl Channel Islands). Clearpay charges a £6 late fee for each late instalment and a further £6 if it’s still unpaid 7 days later. Late fees are capped at £6 for orders under £24 and the lower of £24 or 25% of the order value for orders over £24. Missed payments may affect your ability to use Clearpay in the future and your details may be passed onto a debt collection agency working on Clearpay’s behalf. Clearpay is credit that is not regulated by the Financial Conduct Authority. T&Cs and other eligibility criteria apply at clearpay.co.uk/terms
Product Overview
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, 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 |
| Over £100 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: | 40mm |
| Width: | 600mm |
| Length: | 1200mm |
| Pieces Per Pack: | 12 |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 8.64m2 |
| Brand: | Rockwool |
| Manufacturer's Reference: | 181175 |
| Thermal Conductivity: | 0.035W/mK |
| Density: | 45kg/m3 |
| Fire Rating: | A1 Non-Combustible |
Technical Downloads
Why RWA45?
- High-performance mineral wool insulation slab offering excellent acoustic, thermal, and fire-resistant properties.
- Tightly packed, porous fibres absorb sound, reducing noise transfer.
- Ideal for reducing airborne noise in walls, floors, and partitions in residential, commercial, and industrial buildings.
- Open-cell structure traps air, reducing heat transfer and maintaining consistent indoor temperatures, enhancing energy efficiency.
- Non-combustible with a Euroclass A1 fire rating - resists flames, slows fire spread, and improves fire safety.
Why 40mm?
- Ideal for upgrading external walls, narrow wall cavities, and existing structures that meet compliance standards.
- Perfect for acoustic upgrades in refurbishment projects, especially when retrofitting solid masonry walls to meet party wall standards.
- Not typically used as a standalone solution due to regulatory requirements.
- Most effective when layered to achieve the necessary thickness or used in independent wall linings to enhance existing insulation performance.
- Compact size allows acoustic and thermal improvements without compromising valuable space.
Rockwool
- Rockwool’s commitment to excellence and performance is evident in its wide range of mineral wool insulation solutions.
- These products enable contractors, architects, and building professionals to create structures that deliver superior thermal, acoustic, and fire performance, all while meeting stringent industry regulations and sustainability standards.
Applications
- Interior timber or steel partition walls
- Interior timber frame floors
- Interior timber frame ceilings
- Acoustic ceilings and partition panels
- I-joist interior partitions
- Pitched roofs
- Party walls
- Industrial applications
Benefits
- Zero Ozone Depleting Potential (ODP) and Global Warming Potential (GWP).
- Rot-resistant - withstands mould and mildew.
- Thermal conductivity of 0.035 W/mK.
- Fire Classification (Reaction To Fire) - Euroclass A1 (BS EN 13501-1).
- Hydrophobic - reliable water-repellent properties.
- Excellent acoustic, fire and thermal performance.
Certifications
- A1 non-combustible in accordance with BS EN 13501-1 - achieving the highest possible level of fire performance/resists high temperatures
- CE and Key marked in accordance with BS EN 13162:2012 + A1:2015.v
The slabs are also certified by Lloyd's register of shipping as non-combustible materials for use on:
- Fixed offshore installations
- MED classed ships- DTLR MCA approval
- Rated non-combustible in accordance with ISO 1182 and IMO A. 799
Storage & Handling
- Store slabs indoors, in a dry and well-ventilated area, to prevent moisture absorption.
- Keep slabs off the ground by storing them on pallets or timber supports to avoid damage.
- Protect insulation from direct sunlight, rain, and extreme temperature fluctuations.
- Handle slabs with care to maintain their shape and effectiveness - avoid excessive compression.
- Use gloves and long sleeves when handling to prevent irritation from mineral wool fibres.
- Cut slabs easily with a serrated knife or insulation saw for a precise fit.
- Minimise dust by cutting in a well-ventilated area and using a dust mask if necessary.
