Rockwool RWA45 Slab | 1200mm x 600mm

RockwoolSKU: IUK00890

Sale price£29.32 

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

Need something quicker?

Contact us on 0300 303 4578
or email here!

The ROCKWOOL RWA45 Acoustic Slab is a versatile and high-performance insulation solution designed for a wide range of building applications. Whether you are working on partition walls, ceilings, floors, or roofs, this product offers excellent acoustic, thermal, and fire performance, making it an ideal choice for both general building projects and specialist applications such as schools, hospitals, and industrial buildings.

Data Sheet

Installation Guide


  • Thickness Options: Available in 25mm, 30mm, 40mm, 50mm, 75mm, and 100mm to suit various project requirements.
  • Standard Dimensions: Each slab measures 1200mm x 600mm.
  • Density: 45 kg/m³ for optimal acoustic absorption.
  • Thermal Conductivity: 0.034 W/mK.
  • Fire Performance: Rated Euroclass A1 non-combustible, offering the highest level of fire resistance.
  • Water Repellent: Prevents moisture build up, damp, and rot, ensuring durability and longevity.


  • Excellent Acoustic Performance: The RWA45 slabs effectively absorb sound, reducing noise transmission and enhancing acoustic comfort.
  • Thermal Insulation: Provides superior thermal resistance, contributing to energy efficiency and maintaining comfortable indoor temperatures.
  • Fire Safety: With a melting point above 1000°C, these slabs significantly enhance fire safety by preventing the spread of flames and maintaining structural integrity during a fire.
  • Durable and Easy to Handle: Lightweight and semi-rigid, ROCKWOOL RWA45 slabs are easy to cut, handle, and install, making them a practical choice for various construction projects.
  • Sustainable Material: Manufactured using organic and sustainable materials, ROCKWOOL RWA45 is an environmentally friendly insulation option.

Data Sheet

Installation Guide

Why You Should Buy:

  • Versatility: Suitable for a wide range of applications, from residential to commercial buildings, ensuring you get the most out of one product.
  • Comprehensive Protection: Combines acoustic, thermal, and fire insulation in one product, providing a multifaceted solution to building insulation needs.
  • Long-Lasting Performance: Designed to maintain its high performance over the building's lifetime, ensuring lasting value and peace of mind.
  • Ease of Installation: The lightweight and manageable nature of the slabs reduces installation time and labour costs.

Frequently Asked Questions (FAQs):

What is ROCKWOOL RWA45 Acoustic Slab?

  • ROCKWOOL RWA45 is a high-performance insulation slab designed for acoustic, thermal, and fire protection. It is made from stone wool and has a density of 45 kg/m³.

Where can I use ROCKWOOL RWA45 slabs?

  • These slabs are ideal for use in partition walls, ceilings, floors, roofs, and various commercial and industrial applications. They are also suitable for interior timber or steel partition walls, interior timber frame floors, ceilings, and party walls.

Are ROCKWOOL RWA45 slabs flammable?

  • No, ROCKWOOL RWA45 slabs are non-flammable. They are rated Euroclass A1, which is the highest rating for non-combustibility. They will not catch fire or melt, making them an excellent fire barrier.

How do I cut ROCKWOOL RWA45 slabs?

  • You can easily cut these slabs using a utility knife or a serrated knife. It is recommended to mark the measurements on the slab before cutting and to use safety goggles and gloves during the process.

What are ROCKWOOL RWA45 slabs made from?

  • ROCKWOOL slabs are made by spinning molten rock and minerals with steel slag to create a wool-like product. This process emulates natural volcanic activity.

Pros and Cons:


  • Fire Resistance: ROCKWOOL RWA45 is rated Euroclass A1 non-combustible, providing excellent fire protection.
  • Acoustic Performance: These slabs have superior sound absorption properties, making them ideal for noise reduction.
  • Thermal Insulation: They offer excellent thermal resistance, helping to maintain comfortable indoor temperatures.
  • Moisture Repellent: The inorganic composition prevents moisture build-up, dampness, and rot.
  • Durability: They are long-lasting and maintain high performance over time.
  • Ease of Installation: Lightweight and easy to handle, these slabs simplify the installation process.
  • Environmentally Friendly: Made from sustainable materials, ROCKWOOL RWA45 is an eco-friendly choice.


  • Handling Precautions: Proper safety measures, such as using gloves and goggles, are necessary during installation.

Customer Feedback:

Positive Feedback:

  • Many customers have praised the product for its excellent soundproofing capabilities, noting significant reductions in noise levels after installation.
  • Users have also highlighted the fire safety benefits, expressing peace of mind knowing that the product provides robust fire protection.
  • The ease of cutting and installing ROCKWOOL RWA45 slabs has been frequently mentioned, making it a preferred choice for DIY projects.

Constructive Feedback:

  • Some customers pointed out the need for proper protective gear during installation to avoid irritation from the fibres. PPE kit here

For more detailed information and technical specifications, you can speak to one of the team on 03003 034 578 who would be more than happy to help.​​

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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        Customer Reviews

        Based on 9 reviews
        Rockwool RWA45 Slab | 1200mm x 600mm

        did the job, Rockwool slabs easy to cut and install. Useful size too


        Awesome product.

        S Williaams
        Rockwool RWA45 Slab | 1200mm x 600mm

        Fantastic insulation and soundproofing


        Service was excellent

        Rockwool RWA45 Slab 1200mm x 600mm

        Good value excellent quality. Delivery on time and we’ll done.