Mineral Wool Insulation
The versatility of mineral wool makes it one of the most effective thermal and sound insulation materials in the UK. It delivers remarkable thermal resistance, reliably keeping indoor spaces warm while also reducing noise.
What is mineral wool?
Mineral or stone wool comes from molten rock or industrial slag. The material is processed under controlled heat and then spun to produce fine, fibrous threads. This intertwined network of fibres entraps air and limits the flow of heat, boosting the material’s capacity to insulate.
Leading brands such as Knauf and Rockwool provide high-performing mineral wool solutions that combine thermal efficiency with outstanding acoustic absorption and fire resistance. In the UK, mineral wool is commonly used because it’s durable, easy to fix and compatible with most building systems.
What is wool insulation used for?
Insulating stone wool is ideal for projects where consistent comfort and efficient energy use are crucial. Common applications include:
- Floors: Installed between joists.
- Roofs: Used between rafters in attics and lofts.
- Walls: Fixed between studs, cavity walls and internal partitions.
- Ceilings and plant rooms: Used to boost fire and acoustic performance.
Types of mineral wool insulation
Our mineral wool insulation in UK product range is suitable for all building types and specifications. Some of the popular product choices include:
- Rockwool insulation slabs: Available in rigid and semi-rigid forms. Both types are equally durable. Used on ceilings, roof spaces, and floor and wall systems where precision fitting is key.
- Mineral wool rolls: Available in flexible form. Great for lofts and roof spaces.
- Acoustic mineral wool: Absorbs sound, reducing noise transfer between rooms. Ideal for partitions, ceilings, and recording spaces.
- High-density slabs: Stable and durable. Best for fire-rated assemblies or areas requiring extra strength and stability.
Benefits of mineral insulation
Installing stone wool insulation brings multiple advantages that go beyond simple heat retention. They include:
- Excellent thermal resistance.
- Superior acoustic control.
- Remarkable fire resistance.
- Good vapour resistance.
- Easy installation.
- Helps meet UK Building Regulations Part L and Part E.
- Manufactured from abundant raw materials.
Why choose our mineral wool insulation?
Here is what sets Insulation Wholesale apart as a trusted supplier of mineral wool insulation in the UK:
- Premium-grade materials suitable for any project scale.
- Expert guidance for both professionals and DIY users.
- Competitive prices across all product types.
- Dedicated support to help you choose the right thickness, size, and format.
- Sustainable sourcing for an eco-conscious build.
- Fast, nationwide delivery (1–3 working days, unless otherwise stated during checkout).
Searching for mineral wool insulation near me? Discover our extensive selection of mineral wool solutions from trusted brands like Rockwool and Knauf. Order online today for quick UK delivery and expert advice.
FAQ
What is mineral wool insulation?
This product falls in the mineral-based category of insulating materials, which includes glass wool. To produce mineral wool, manufacturers spin molten rock or slag into fine strands. It’s valued for its balance of thermal, acoustic, and fire-resistant performance.
What is mineral wool insulation made of?
Mineral wool is produced from natural stone, most commonly basalt. It may also be made from recycled industrial slag. The slag or rock is first heated and then spun until it obtains a thread-like structure that can trap air. These interlocking fibres enhance the product’s insulation capabilities.
How to cut mineral wool insulation?
Use a sharp insulation knife or long-bladed saw. For clean and precise cuts, take accurate measurements and mark the cutting line. For neat, even results, use a saw guide or straight edge to guide the cutting tool.
How to install mineral wool insulation?
- Step 1: Gently press the insulation into the space that requires insulation. Compressing the fibres too hard can remove the air pockets that trap heat, minimising its efficacy. To avoid this, cut the roll or slab to size so that it fits without requiring excessive compression.
- Step 2: Use the correct fixings or retaining systems for vertical applications.
- Step 3: Seal all gaps.
Always wear protective gloves, goggles, and a dust mask during installation.
Where to buy mineral wool insulation?
Get premium mineral wool solutions right here at Insulation Wholesale, including insulating materials for fire-rated applications. We stock a wide range of Rockwool insulation, including rolls and slabs, at great prices. All are available for quick delivery nationwide.
Showing all 32 results
-
100mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 4.32m2 Pack
100mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
£40.41£48.49 Ex VATInc VAT£9.35£11.22 Per m2 Add to cart -
100mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 2.88m2 Pack
100mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
£21.39£25.67 Ex VATInc VAT£7.43£8.92 Per m2 Add to cart -
100mm Superglass Party Wall Roll 7.85m2
Superglass Party Wall Roll is a lightweight, non-combustible glass mineral wool insulation roll. The flexible roll is cut at 3x455mm widths to fit between standard wall ties spacings and to allow easy installation and minimum on-site cutting and waste. Manufactured at a minimum density of 18kg/m3 .
£60.80£72.96 Ex VATInc VAT£7.75£9.30 Per m2 Add to cart -
100mm URSA Party Wall Roll 5.46m2
100mm URSA Party Wall Roll is a high-density insulation that helps reduce noise transfer between connecting walls, creating quieter spaces in both homes and commercial buildings.
£52.38£62.86 Ex VATInc VAT£9.59£11.51 Per m2 Add to cart -
140mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 2.88m2 Pack
140mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
£37.03£44.44 Ex VATInc VAT£12.86£15.43 Per m2 Add to cart -
50mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 6.48m2 Pack
50mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
£26.39£31.67 Ex VATInc VAT£4.07£4.88 Per m2 Add to cart -
75mm ODE Acoustic Roll Insulation 9.6m2 Roll
75mm ODE Insulation Acoustic Roll is designed to reduce sound transmission, making it an ideal solution for creating quieter indoor environments. Its flexible and simple-to-install design effectively absorbs sound, making it perfect for both residential and commercial spaces.
£26.43£31.72 Ex VATInc VAT£2.75£3.30 Per m2 Add to cart -
75mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 4.32m2 Pack
75mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
£25.34£30.41 Ex VATInc VAT£5.87£7.04 Per m2 Add to cart -
100mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 3.6m2 Pack
100mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
POA Get a quote -
100mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 46.08m2 Pallet
100mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
125mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 34.56m2 Pallet
125mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
140mm Knauf Rocksilk Flexible Insulation Slab 1200mm x 600mm 2.16m2 Pack
140mm Knauf Insulation Rocksilk Flexible Slab is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications as well as the fire protection of a loft conversion floor. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
POA Get a quote -
150mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 34.56m2 Pallet
150mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
180mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 25.92m2 Pallet
180mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
POA Get a quote -
180mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 25.92m2 Pallet
180mm Rainscreen Du Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
25mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 14.4m2 Pack
25mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
POA Get a quote -
25mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 138.24m2 Pallet
25mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
POA Get a quote -
30mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 138.24m2 Pallet
30mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
POA Get a quote -
40mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 138.24m2 Pallet
40mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
POA Get a quote -
50mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 7.2m2 Pack
50mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
POA Get a quote -
50mm Rockwool Ablative Coated Batt 1200mm x 600mm x 0.72m2
50mm Rockwool Ablative Coated Batt is a mineral wool insulation product, pre-coated on both sides with a high performance ablative coating. Rockwool Ablative Coated Batt application includes multiple substrates including solid walls and floors and flexible walls.
£22.23£26.68 Ex VATInc VAT Add to cart -
50mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 8.64m2 Pack
50mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
POA Get a quote -
50mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 69.12m2 Pallet
50mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
60mm Rockwool Ablative Coated Batt 1200mm x 600mm x 0.72m2
60mm Rockwool Ablative Coated Batt is a mineral wool insulation product, pre-coated on both sides with a high performance ablative coating. Rockwool Ablative Coated Batt application includes multiple substrates including solid walls, floors, and flexible walls.
£26.93£32.32 Ex VATInc VAT Add to cart -
60mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 103.68m2 Pallet
60mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
POA Get a quote -
60mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 51.84m2 Pallet
60mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
60mm Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm 92.16m2 Pallet
60mm Rockwool RWA45 has been developed for thermal, acoustic and fire performance in a range of construction types. It is suitable for applications on partition walls, ceilings, floors and roofs.
POA Get a quote -
70mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 92.16m2 Pallet
70mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
POA Get a quote -
75mm Knauf Rocksilk RS45 Building Insulation Slab 1200mm x 600mm 4.32m2 Pack
75mm Knauf Insulation Rocksilk RS45 is a Rock Mineral Wool slab, designed for use in multiple thermal and acoustic applications. It is non-combustible with the best possible Euroclass A1 reaction to fire classification.
POA Get a quote -
75mm Rockwool Rainscreen Duo Slab 1200mm x 600mm 51.84m2 Pallet
75mm Rainscreen Duo Slab is dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory applied water-repelling agent, acts to resist rain ingress during construction.
POA Get a quote -
75mm Superglass Party Wall Roll 10.51m2
75mm Superglass Party Wall Roll is a lightweight, non-combustible glass mineral wool insulation roll. The flexible roll is cut at 3x455mm widths to fit between standard wall ties spacings and to allow easy installation and minimum on-site cutting and waste. Manufactured at a minimum density of 18kg/m3 .
POA Get a quote -
90mm Rockwool Flexi Slab Acoustic Insulation 1200mm x 600mm 86.40m2 Pallet
90mm Rockwool Flexi has been designed as a multi-use, dual-purpose acoustic and thermal mineral wool insulation with a unique flexible edge along one side. It is suitable for use all over the home, in pitched roof rafters, framed external walls, internal partitions, intermediate floors, separating walls and floors, and timber suspended ground floors.
POA Get a quote
