1 Review
View Product Reviews100mm Rockwool RW5 Acoustic Sound Insulation Slab (1.44m2/Pack)
Nationwide Delivery
Mon 22 Jun
- 0days
- 19hrs
- 10mins
- 18secs
lock Secure checkout (powered by Stripe)
Learn more
Pay in 3 interest-free payments
Split your purchase of £34.95 into 3 with no sign-up fees or late fees.
£23.30
today
£23.30
1 month
£23.30
2 months
How it works
- Choose PayPal at checkout to pay later with Pay in 3.
- Complete your purchase with the first payment today.
- Remaining payments are taken automatically.
Pay in 3 is a form of credit, so carefully consider whether the purchase is affordable and how you will make the repayments. Be aware of the possible impact of using Pay in 3 and of missing payments, including making other borrowing more difficult or more expensive. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Available for purchases of £30 to £2,000. Terms and conditions apply. PayPal Pay in 3 is a trading name of PayPal (Europe) S.à r.l. et Cie, S.C.A. 22-24 Boulevard Royal L-2449, Luxembourg.
Learn more
Buy now. Pay with Klarna at your own pace.
Get what you need for your next project, choose how you pay.
Pay in 30 days
£34.95
Pay in full
Klarna's Pay in 30 days is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
Pay over time
£23.30
Every 30 days
Pay in 3
£23.30
today
£23.30
in 30 days
£23.30
in 60 days
Klarna's Pay in 3 is an unregulated credit agreement. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. T&Cs and late fees apply.
How it works
- At checkout select Klarna.
- Choose your payment plan.
- Different payment plans may be shown depending on the purchase amount and credit score.
- Complete your checkout.
- The amount will be charged based on the payment plan you chose.
Learn more
Pay in 4 interest-free payments
Split your purchase of £34.95 into 4 with no sign-up fees or late fees. Your purchase will be split into 4 payments, payable every 2 weeks
£17.48
today
£17.48
second payment
£17.48
third payment
£17.48
fourth payment
How it works
- 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
Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £45 ex. VAT |
| Over £400 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £90 ex. VAT |
| Over £400 ex. VAT | £55 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 |
How delivery works
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
- Deliveries are typically kerbside.
- Please ensure someone is on-site to accept delivery. For heavier items, help with offloading may be required.
- Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
Returns
Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
Key Features
- {{volume_off}} Excellent acoustic and thermal performance
- {{public}} Zero Ozone Depletion Potential (ODP)
Technical Specification
| URN: | 3002244 |
|---|---|
| Product: | RW5 |
| Brand: | Rockwool |
| Application: | Ceilings, Walls, and Floors |
| Indoor/Outdoor Usage: | Indoor |
| Material Type: | Rock Mineral |
| Thickness: | 100mm |
| Width: | 600mm |
| Length: | 1200mm |
| Weight: | 14.4kg |
| Sales Unit: | Pack |
| Sales Unit Coverage: | 1.44m2 |
| Pieces Per Pack: | 2 |
| Fire Rating: | A1 Non-Combustible |
| Moisture Resistant: | Water repellent & Non-hygroscopic |
| Thermal Conductivity: | 0.034W/mK |
| Density: | 100kg/m3 |
| Certification: | BS EN 13162 |
| Edge: | Square |
| Manufacturer's Reference: | 181200 |
Technical Downloads
Product Overview
Stone wool insulation slab, 100mm thick and cut to 1200 × 600mm, developed for demanding acoustic and fire-rated constructions.
With a density of 100 kg/m³, the slab offers a robust balance of rigidity and sound absorption. The added mass helps to block airborne noise transfer, while the dense fibre structure absorbs sound within the cavity, improving acoustic comfort across partitions, floors, and ceilings.
This higher density also gives the slab excellent dimensional stability, supporting structural integrity and ensuring it holds its shape once installed.
Its semi-rigid form allows for a friction fit that minimises air gaps and maintains consistent performance.
Classified as non-combustible, the slab provides reliable fire resistance, contributing to enhanced safety within the building fabric.
At 100mm thick, it delivers the highest levels of airborne sound reduction available within the range, making it well suited to applications where superior noise control and fire performance are required.
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.
- 100kg/m³ density: Rigid and stable, providing maximum sound absorption and secure fitting.
- Semi-rigid slab format: Installs 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.
- 100mm thickness: Provides maximum noise reduction in specialist acoustic and fire-rated builds.
Applications
- Stud partitions: Enhances acoustic separation between rooms to meet Approved Document E standards.
- Ceilings: Improves airborne sound insulation in shallow ceiling voids.
- Floors: Adds effective acoustic performance to timber floors.
- Separation walls: Provides fire safety and sound absorption in dividing walls.
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.
- CE marked to BS EN 13162: Factory-made mineral wool insulation, tested for thermal conductivity (0.034 W/mK) and acoustic absorption performance.
Customer Reviews
Very good service from the sales team! The RW5 is great for fire performance and has water repellent qualities as well. Will buy again for my next sound studio.
Leave a Review
Related Articles
