Rockwool RWA45 Acoustic Slab | 1200mm x 600mm x 100mm

RockwoolSKU: IUK00889

Sale price£25.92 

inc VAT

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

Delivery within 2 - 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!

Rockwool RWA45 100mm has been developed for thermal, acoustic and fire performance in a range of construction types. Rockwool RWA45 100mm is made up of high-quality resin bonded slabs in a variety of thicknesses and densities. Specialist facings are available to order to meet the specifications of unique projects.

Rockwool RWA45 100mm can be applied to an array of general building applications for acoustic and thermal insulation of partition walls, ceilings, floors, and roofs. The multi-use solution is well suited for easy application throughout constructions.

Rockwool RWA45 100mm is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Rockwool RWA45 100mm in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. Rockwool RWA45 100mm insulation slabs achieve Lambda 0.035 W/mK and have a density of 45 kg/m3.

Data Sheet

Installation Guide


Rockwool RW45 100mm has a thermal conductivity of just 0.035W/mK. The thermal conductivity means less heat will pass through the insulation slabs, keeping internal temperatures level. The thermal properties of the Rockwool RWA45 100mm will also prevent heat / energy escaping the building and save money on energy bills. Less energy escaping will also create a more energy efficient property.


Rockwool RW45 100mm, either un-faced or with an aluminium foil or glass fleece on one or both surfaces, achieve an A1 classification in accordance with BS EN 13501-1 and therefore comply with the requirements of non-combustible materials/products, as defined in all UK and Ireland Building Regulations.

Acoustic performance

Rockwool RW45 100mm products work in two distinct ways to reduce noise, either by impeding the transmission of sound through an element of the structure or by absorption of sound at the surface. The structure of the fibres in Rockwool RWA45 100mm make them ideal for use as a sound absorber.

Product Specifications:

  • Thickness: 100mm
  • Dimensions: 1200mm x 600mm
  • Density: 45 kg/m³
  • Thermal Conductivity: 0.034 W/mK
  • Fire Rating: Euroclass A1 non-combustible
  • Water Repellent: Yes, prevents moisture build-up, damp, and rot
  • Manufacturers Reference: 209274

Data Sheet

Installation Guide


  • Excellent Acoustic Performance: Effectively absorbs sound to reduce noise transmission.
  • Superior Thermal Insulation: Contributes to energy efficiency by maintaining comfortable indoor temperatures.
  • High Fire Safety: Rated Euroclass A1 non-combustible, providing excellent fire resistance.
  • Durability: Designed to maintain high performance over the building's lifetime.
  • Ease of Installation: Lightweight and easy to cut, handle, and install.

Frequently Asked Questions (FAQs):

  1. What is ROCKWOOL RWA45 100mm Acoustic Slab used for? It is used for thermal, acoustic, and fire insulation in partition walls, ceilings, floors, and roofs.
  2. How do I cut ROCKWOOL RWA45 slabs? Use a utility knife or a serrated knife. Mark the measurements on the slab before cutting for precision and use safety goggles and gloves.
  3. Are ROCKWOOL RWA45 slabs flammable? No, they are rated Euroclass A1 non-combustible, ensuring they do not catch fire or melt.
  4. What are ROCKWOOL RWA45 slabs made from? They are made from stone wool, created by spinning molten rock and minerals with steel slag.

Pros and Cons:

  • Pros:
    • Fire Resistance: Provides excellent fire protection with an A1 non-combustible rating.
    • Acoustic Performance: Reduces noise transmission effectively.
    • Thermal Insulation: Offers superior thermal resistance.
    • Moisture Repellent: Prevents moisture build-up and rot.
    • Durability: Long-lasting performance.
    • Ease of Installation: Easy to handle and install.
    • Environmentally Friendly: Made from sustainable materials.
  • Cons:
    • Can Itch: Wear gloves..... not as bad as glass wool though.

Data Sheet

Installation Guide


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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