Free Delivery with Orders over £500 Inc Vat, Deliveries in Mainland England Only. Alternative Equal brands maybe sent as substitutes if not available in certain geographical areas. CHRISTMAS HOLIDAYS FROM 23RD DECEMBER 2025-5TH JANUARY 2026. ANY ORDERS PLACED BETWEEN THESE DATES WILL BE PROCESSED ON THE 5TH JANUARY FOR DELIVERY THAT WEEK. FOR ANY ORDERS REQUIRED UPTO THE 23RD DECEMBER THEY MUST BE ORDERED BY THURSDAY 18TH DECEMBER.

Insulation Slabs

28 products

  • 100mm Rockwool RWA45 Acoustic Sound Insulation Slab (2.88m2/Pack)

    Rockwool 100mm Rockwool RWA45 Acoustic Sound Insulation Slab (2.88m2/Pack)

    100mm Rockwool RWA45 Acoustic Sound Insulation Slab is a multi-application acoustic insulation solution that is suitable for use in a wide variety of building projects. It is rated as A1 non-combustible in accordance with BS EN 13501-1, achieving the highest possible level of fire performance. 100mm Rockwool RWA45 slabs have a density of 45kg/m3, giving them excellent acoustic and soundproof properties and making them ideal for use in separating floors and walls. These 100mm Rockwool insulation slabs are resin bonded and cut to 1200mm x 600mm, which allows them to fit easily between standard stud partitions and floor joists that are at 600mm centres. Sometimes referred to as Sound slabs due to their acoustic properties, 100mm RWA45 Slabs are the most popular acoustic and soundproofing insulation solution on the market. The 100mm is also the most popular thickness of the RWA45 range. Technical Specification Material Type: Rock Mineral Thickness: 100mm Width: 600mm Length: 1200mm Pieces Per Pack: 4 Packs Per Pallet: 20 Sales Unit: Pack Sales Unit Coverage: 2.88m2 Brand: Rockwool Manufacturer's Reference: 209274 Thermal Conductivity: 0.035W/mK Density: 45kg/m3 Fire Rating: A1 Non-Combustible

    £27.00

  • 100mm Rockwool RW3 Acoustic Sound Insulation Slab (2.88m2/Pack)

    Rockwool 100mm Rockwool RW3 Acoustic Sound Insulation Slab (2.88m2/Pack)

    ROCKWOOL RW3 has been developed for thermal, acoustic and fire performance in a range of construction types. RW3 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. RW3 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW3 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW3 insulation slabs achieve Lambda 0.034 W/mK and are available in eight standard thicknesses from 25-100mm, with a density of 60 kg/m3. Technical Specification Material Type: Rock Mineral Thickness: 100mm Width: 600mm Length: 1200mm Pieces Per Pack: 4 Packs Per Pallet: 12 Sales Unit: Pack Sales Unit Coverage: 2.88m2 Brand: Rockwool Manufacturer's Reference: 181186 Thermal Conductivity: 0.034W/mK Density: 60kg/m3 Fire Rating: A1 Non-Combustible

    £45.10

  • 75mm Rockwool RW3 Acoustic Sound Insulation Slab (4.32m2/Pack)

    Rockwool 75mm Rockwool RW3 Acoustic Sound Insulation Slab (4.32m2/Pack)

    ROCKWOOL RW3 has been developed for thermal, acoustic and fire performance in a range of construction types. RW3 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. RW3 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW3 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW3 insulation slabs achieve Lambda 0.034 W/mK and are available in eight standard thicknesses from 25-100mm, with a density of 60 kg/m3. Technical Specification Material Type: Rock Mineral Thickness: 75mm Width: 600mm Length: 1200mm Pieces Per Pack: 6 Packs Per Pallet: 12 Sales Unit: Pack Sales Unit Coverage: 4.32m2 Brand: Rockwool Manufacturer's Reference: 181185 Thermal Conductivity: 0.034W/mK Density: 60kg/m3 Fire Rating: A1 Non-Combustible

    £53.60

  • 100mm Rockwool RW5 Acoustic Sound Insulation Slab (1.44m2/Pack)

    Rockwool 100mm Rockwool RW5 Acoustic Sound Insulation Slab (1.44m2/Pack)

    ROCKWOOL RW5 has been developed for thermal, acoustic and fire performance in a range of construction types. RW5 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. RW5 is rated Euroclass A1 non-combustible, providing the highest level of fire performance. Using RW5 in ceilings, walls and floors can help to compartmentalise rooms, reducing fire spread and damage. RW5 insulation slabs achieve Lambda 0.034 W/mK and are available in five standard thicknesses from 25-100mm, with a density of 100 kg/m3. Technical Specification Material Type: Rock Mineral Thickness: 100mm Width: 600mm Length: 1200mm Pieces Per Pack: 2 Packs Per Pallet: 24 Sales Unit: Pack Sales Unit Coverage: 1.44m2 Brand: Rockwool Manufacturer's Reference: 181200 Thermal Conductivity: 0.034W/mK Density: 100kg/m3 Fire Rating: A1 Non-Combustible

    £49.05

  • 25mm Rockwool RWA45 Acoustic Sound Insulation Slab (11.52m2/Pack)

    Rockwool 25mm Rockwool RWA45 Acoustic Sound Insulation Slab (11.52m2/Pack)

    25mm Rockwool RWA45 Acoustic Sound Insulation Slab is a multi-purpose acoustic insulation solution that is suitable for a wide range of building applications. It is certified as A1 non-combustible in accordance with BS EN 13501-1, achieving the highest possible level of fire performance. 25mm Rockwool RWA45 slabs have a density of 45kg/m3, giving them excellent acoustic properties and making them ideal for use in separating floors and walls. These 25mm Rockwool insulation slabs are resin bonded and cut to 1200mm x 600mm, which means they fit easily between most standard stud partitions and floor joists. Sometimes referred to as Sound slabs due to their acoustic properties, 25mm RWA45 Slabs are the most popular acoustic insulation solution on the market. Technical Specification Material Type: Rock Mineral Thickness: 25mm Width: 600mm Length: 1200mm Pieces Per Pack: 16 Packs Per Pallet: 12 Sales Unit: Pack Sales Unit Coverage: 11.52m2 Brand: Rockwool Manufacturer's Reference: 181173 Thermal Conductivity: 0.035W/mK Density: 45kg/m3 Fire Rating: A1 Non-Combustible

    £33.00

  • 75mm Rockwool RWA45 Acoustic Sound Insulation Slab (4.32m2/Pack)

    Rockwool 75mm Rockwool RWA45 Acoustic Sound Insulation Slab (4.32m2/Pack)

    75mm Rockwool RWA45 Acoustic Sound Insulation Slab is a multi-purpose acoustic insulation solution that can be installed in a wide variety of building projects and applications. It has been designated as A1-non-combustible under BS EN 13501-1, giving it the highest fire rating possible. 75mm Rockwool RWA45 slabs have a density of 45kg/m3, making them ideal for use in walls and separating floors. These 75mm Rockwool insulation slabs have been resin bonded and are cut to 1200mm x 600mm, which means they fit well between standard floor joists and stud wall partitions. Also known as Sound slabs due to their well-renowned acoustic properties, these 75mm RWA45 slabs are the most common acoustic insulation solution on the market. Technical Specification Material Type: Rock Mineral Thickness: 75mm Width: 600mm Length: 1200mm Pieces Per Pack: 6 Packs Per Pallet: 20 Sales Unit: Pack Sales Unit Coverage: 4.32m2 Brand: Rockwool Manufacturer's Reference: 209290 Thermal Conductivity: 0.035W/mK Density: 45kg/m3 Fire Rating: A1 Non-Combustible

    £33.00

  • 50mm Rockwool RWA45 Acoustic Sound Insulation Slab (6.48m2/Pack)

    Rockwool 50mm Rockwool RWA45 Acoustic Sound Insulation Slab (6.48m2/Pack)

    50mm Rockwool RWA45 Acoustic Sound Insulation Slab is an acoustic insulation product that can be used in a variety of applications due to its versatile nature. It has been certified A1 non-combustible according to BS EN 13501-1, which guarantees the best possible fire performance. The slabs of 50mm Rockwool RWA45 have a density 45kg/m3, making them perfect for use in separating floors or walls. These 50mm Rockwool insulation slabs have been resin-bonded and cut to 1200mm x 600mm, which means they will fit snugly between standard stud partitions or floor joists. Due to their acoustic properties, 50mm RWA45 slabs are sometimes called Sound slabs. This is the most popular acoustic insulation solution on the market. Technical Specification Material Type: Rock Mineral Thickness: 50mm Width: 600mm Length: 1200mm Pieces Per Pack: 9 Packs Per Pallet: 16 Sales Unit: Pack Sales Unit Coverage: 6.48m2 Brand: Rockwool Manufacturer's Reference: 181176 Thermal Conductivity: 0.035W/mK Density: 45kg/m3 Fire Rating: A1 Non-Combustible

    £33.00

  • 75mm Superglass Superwall 36 Cavity Wall Insulation Slab (5.46m2/Pack)

    Superglass 75mm Superglass Superwall 36 Cavity Wall Insulation Slab (5.46m2/Pack)

    Superglass Superwall 36 is a British Board of Agreement (BBA) approved, non-combustible and water repellent glass mineral wool insulation cavity wall batt. The flexible batt is supplied at 455mm wide to allow easy installation between standard vertical wall tie spacings and minimum on-site cutting and waste. Superglass Superwall 36 is designed to provide thermal insulation in full-fill or partial-fill external masonry cavity walls, up to 25m in height for full-fill and with no height restriction in partial-fill (additional requirements apply for buildings above 12 metres in height for full fill and above 25 metres in height for partial fill). Technical Specification Material Type: Glass Mineral Thickness: 75mm Width: 455mm Length: 1200mm Pieces Per Pack: 10 Packs Per Pallet: 30 Sales Unit: Pack Sales Unit Coverage: 5.46m2 Brand: Superglass Manufacturer's Reference: 5269C1 Thermal Conductivity: 0.036W/mK Fire Rating: A1 Non-Combustible

    £31.45

  • 75mm Knauf Earthwool RS60 Building Slab (4.32m2/Pack)

    Knauf 75mm Knauf Earthwool RS60 Building Slab (4.32m2/Pack)

    Earthwool Building Slabs are non-combustible Rock Mineral Wool slabs, manufactured using Knauf Insulation's revolutionary ECOSE Technology in a range of densities, and are designed for use in multiple applications. Earthwool Building Slab RS60 is manufactured with a density of 60kg/m3, designed for use in a variety of applications including internal partitions, timber and metal studs, and in between timber rafters and floor joists. Technical Specification Material Type: Rock Mineral Thickness: 75mm Width: 600mm Length: 1200mm Pieces Per Pack: 6 Packs Per Pallet: 12 Sales Unit: Pack Sales Unit Coverage: 4.32m2 Brand: Knauf Insulation Manufacturer's Reference: 2411330 Thermal Conductivity: 0.034W/mK Density: 60kg/m3 Fire Rating: A1 Non-Combustible

    £53.29

  • 75mm Knauf Earthwool RS45 Building Slab (4.32m2/Pack)

    Knauf 75mm Knauf Earthwool RS45 Building Slab (4.32m2/Pack)

    Earthwool Building Slabs are non-combustible Rock Mineral Wool slabs, manufactured using Knauf Insulation's revolutionary ECOSE Technology in a range of densities, and are designed for use in multiple applications. Earthwool Building Slab RS45 is manufactured with a density of 45kg/m3, designed for use in a variety of applications including internal partitions, timber and metal studs, and in between timber rafters and floor joists. Technical Specification Material Type: Rock Mineral Thickness: 75mm Width: 600mm Length: 1200mm Pieces Per Pack: 6 Packs Per Pallet: 12 Sales Unit: Pack Sales Unit Coverage: 4.32m2 Brand: Knauf Insulation Manufacturer's Reference: 2411328 Thermal Conductivity: 0.035W/mK Density: 45kg/m3 Fire Rating: A1 Non-Combustible

    £36.75

  • 25mm Rockwool RWA45 Acoustic Sound Insulation Slab (11.52m2/Pack) 20 Packs/Pallet-Pallet Deal 230.4m2

    Rockwool 25mm Rockwool RWA45 Acoustic Sound Insulation Slab (11.52m2/Pack) 20 Packs/Pallet-Pallet Deal 230.4m2

    25mm Rockwool RWA45 Acoustic Sound Insulation Slab is a multi-purpose acoustic insulation solution that is suitable for a wide range of building applications. It is certified as A1 non-combustible in accordance with BS EN 13501-1, achieving the highest possible level of fire performance. 25mm Rockwool RWA45 slabs have a density of 45kg/m3, giving them excellent acoustic properties and making them ideal for use in separating floors and walls. These 25mm Rockwool insulation slabs are resin bonded and cut to 1200mm x 600mm, which means they fit easily between most standard stud partitions and floor joists. Sometimes referred to as Sound slabs due to their acoustic properties, 25mm RWA45 Slabs are the most popular acoustic insulation solution on the market. Technical Specification Material Type: Rock Mineral Thickness: 25mm Width: 600mm Length: 1200mm Pieces Per Pack: 16 Packs Per Pallet: 12 Sales Unit: Pack Sales Unit Coverage: 11.52m2 Brand: Rockwool Manufacturer's Reference: 181173 Thermal Conductivity: 0.035W/mK Density: 45kg/m3 Fire Rating: A1 Non-Combustible

    £639.00

  • Knauf Dritherm Cavity Slab 37 1200x455x100mm 25 packs per pallet-Pallet Deal 163.75m2

    Knauf Insulation Knauf Dritherm Cavity Slab 37 1200x455x100mm 25 packs per pallet-Pallet Deal 163.75m2

      100mm Knauf Earthwool DriTherm 37 Cavity Wall Insulation Slabs are an effective thermal solution for insulating external wall cavities. These 100mm Earthwool semi-rigid glass wool slabs are designed as a full fill cavity solution and can be used in buildings up to 12m high due to their A1 non-combustible classification. The 37 relates to the product's thermal conductivity value of 0.037 W/mK. Made using Knauf's unique ECOSE technology, as well as a water repellent additive, Knauf DriTherm 37 100mm cavity insulation slabs are soft to the touch and provide excellent protection for the lifetime of the building. They are cut at 455mm wide in line with standard wall tie spacings, producing a closed joint with the adjacent slabs. Technical Specification Material Type: Glass Mineral Thickness: 100mm Width: 455mm Length: 1200mm Pieces Per Pack: 12 Packs Per Pallet: 25 Sales Unit: Pack Sales Unit Coverage: 6.55m2 Brand: Knauf Insulation Manufacturer's Reference: 2400401 Thermal Conductivity: 0.037W/mK Fire Rating: A1 Non-Combustible

    £1,002.11

Insulation Slabs

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