Knauf Rocksilk® Fabrication Slab | 1200 x 600 x 100mm (40kg/m3) | Pallet of 12 Packs

KnaufSKU: IUK01814

Sale price£633.94 

inc VAT

Pay in 3 prices shown are an example only. Total calculated at checkout.

Delivery within 3 - 5 working days

Free Delivery On Orders
Over £599.95 Ex-Vat

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Contact us on 0300 303 4578
or email here!

Knauf Insulation Rocksilk® Fabrication Rock Mineral Wool Slabs:  Ultimate Acoustic Insulation Solution


The Rocksilk® Fabrication Slab is an excellent alternative to popular Knauf Insulation products such as Rocksilk®RS45 and Rocksilk® RWA45.

Manufactured with a density of 40kg/m³, it is an ideal choice for acoustic applications, offering high performance and sustainability with Knauf's unique ECOSE® Technology.

Product Specifications:

Specification Details
Material Rock Mineral Wool
Pack Quantity 5 slabs per pack
Thermal Conductivity 0.037W/mK
Thermal Resistance 2.75m2K/W
Length 1200mm
Width 600mm
Thickness 100mm
Total Coverage per Pack 3.6m²
Slabs Per Pack 5
Pallet Coverage 43.2m² (12 packs per pallet)
Fire Classification Euroclass A1 (Non-combustible)
Standards Compliance BS EN 13162, ISO 50001, ISO 14001, ISO 9001
Certification Body TÜV Nord


  • Non-combustible: Highest safety with Euroclass A1 classification.
  • Eco-Friendly: Features bio-based ECOSE® Technology.
  • Durability: Odourless, rot-proof, vermin-resistant, and does not promote the growth of microbes.

Why Choose Rocksilk® Fabrication Slab?

  • Superior Installation: Adapts perfectly to substrates, ensuring optimal performance without air gaps.
  • Longevity: Built to last the entire lifespan of the structure it enhances.
  • Sustainability: Free of ozone-depleting substances and greenhouse gases.

Environmental Impact:

Rocksilk® Fabrication Slab supports a sustainable environment, highlighted by its Environmental Product Declaration.


Rocksilk® Fabrication Slab is used for thermal, acoustic, fire and fabrication applications.

Handling and Storage:

  • Packaging: Recyclable polythene packs.
  • Storage Recommendations: Should be stored indoors or under cover, off the ground.

Frequently Asked Questions (FAQs)

1. What makes Rocksilk® Fabrication Slab a good choice for acoustic insulation?

Answer: Rocksilk® Fabrication Slab is manufactured with a density of 40kg/m³, making it highly effective for sound absorption. Its material properties and design ensure superior acoustic performance, ideal for reducing noise transmission in various applications.

2. Is Rocksilk® Fabrication Slab environmentally friendly?

Answer: Yes, it is! Rocksilk® is made using Knauf Insulation’s unique bio-based binder, ECOSE® Technology, which is free from formaldehyde, phenols, and acrylics. Additionally, it does not contain any ozone-depleting substances or greenhouse gases, making it an environmentally responsible choice.

3. Can Rocksilk® Fabrication Slab be used in areas prone to moisture?

Answer: Absolutely. Rocksilk® Fabrication Slab is non-hygroscopic, which means it does not absorb moisture from the air. It is also rot proof and does not sustain vermin, ensuring long-lasting performance even in moist or damp environments.

4. What are the fire-resistant properties of Rocksilk® Fabrication Slab?

Answer: Rocksilk® Fabrication Slab has the highest possible fire classification, Euroclass A1, meaning it is non-combustible. This makes it a safe choice for applications requiring stringent fire safety measures.

5. How is Rocksilk® Fabrication Slab packaged and what are the storage recommendations?

Answer: The slab is packaged in recyclable polythene packs, designed for short-term protection. For longer-term storage, it should be kept indoors or under a cover and off the ground to protect it from the elements and ensure its integrity.

6. How do I ensure the best performance of Rocksilk® Fabrication Slab after installation?

Answer: For optimal performance, ensure that the slabs are installed without any gaps, as Rocksilk® is designed to adapt to slight imperfections in the substrate and knit together perfectly. Proper installation will maximize its thermal, acoustic, and fire-resistant properties.


Order Value Delivery Charge
Up to £200.00 ex-vat £100.00 ex-vat
£200.00 - £599.95 ex-vat £59.95 ex-vat
Above £599.95 ex-vat Free Delivery


Weekend Delivery
Available upon request


Parcel Rates
Delivery charge may vary depending on quantity and volume of your order.
Pricing will be calculated during checkout.


Local Delivery Charge
Within 35 miles of Postcode S63 9BL - Up to £500.00 ex-vat
Delivery Charge £35.00 ex-vat
Please contact us to arrange collections
Tel: 0300 303 4578 | Email:


Delivery charges will automatically be calculated within the checkout process.
Orders are only processed for delivery between 8.00am - 5.00pm Monday to Friday excluding bank holidays.
Moffett offload will be used for large bulky deliveries and only when agreed with you.
Please advise of any access issues on ordering.
Delivery is Kerbside only.
In the unlikely event that your delivery is not correct or damaged please notify us immediately and mark any issues on the delivery slip.


    Where We Deliver

    Delivery Areas

    We have a fleet of FORS delivery vehicles all with Moffett mechanical off loads that deliver nationwide. Sometimes we may use 3rd party carriers for smaller orders.


      Product Delivery Times

      The vast majority of our orders are dispatched within 3 working days, this can however be up to 5 working days, please contact us if you require something urgent.
      Speciality items may take up to 5-7 working days.
      We will contact you with in 24/48hrs of your order been placed to confirm delivery times and dates.

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