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Loft Insulation

Loft insulation reduces heat loss through the roof, keeping homes warmer in winter and cooler in summer for lower energy consumption. Attic insulation can also act as a sound barrier, reducing external noise entering the home, and is fire and water resistant. Glass wool insulation, or fibreglass insulation, can be used in both lofts and walls. Our range of loft and attic insulation includes market leading brands Rockwool and ISOVER.

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  • Rockwool Thermal Insulation Roll 2750 x 1200 x 100mm

    Rockwool Thermal Insulation Roll 2750 x 1200 x 100mm

    The Rockwool Thermal Insulation Roll 100 x 1200 x 2750mm is a A1 fire rated mid-density insulation roll designed for use in lofts. ROCKWOOL Thermal Insulation Roll is designed to increase home comfort and save energy, by insulating one of the most...
  • ISOVER Cavity Wall Slab 36 10.92m2 1200 x 455 x 50mm

    ISOVER Cavity Wall Slab 36 10.92m2 1200 x 455 x 50mm

    CWS 36 is a glass mineral wool slab supplied in 50-150mm thicknesses. The strong, resilient, and flexible batts are 455mm wide to fit between standard wall tie spacing, for warmer rooms and greater occupant comfort.
  • ISOVER Cavity Wall Slab 36 8.74m2 1200 x 455 x 75mm

    ISOVER Cavity Wall Slab 36 8.74m2 1200 x 455 x 75mm

    CWS 36 is a glass mineral wool slab supplied in 50-150mm thicknesses. The strong, resilient, and flexible batts are 455mm wide to fit between standard wall tie spacing, for warmer rooms and greater occupant comfort.
  • ISOVER Spacesaver Wool Insulation Roll 6.03m2 200 x 1160 x 5220mm ISOVER Spacesaver Wool Insulation Roll 6.03m2 200 x 1160 x 5220mm

    ISOVER Spacesaver Wool Insulation Roll 6.03m2 200 x 1160 x 5220mm

    With a thermal conductivity of 0.044W/m.K, these ISOVER Spacesaver glass mineral wool rolls will help to reduce heat loss within the building envelope, decreasing the energy loss. The economical and easy-to-install glass mineral wool rolls are suitable...
  • ISOVER Spacesaver Wool Insulation Roll 14.13m2 100 x 1160 x 12180mm ISOVER Spacesaver Wool Insulation Roll 14.13m2 100 x 1160 x 12180mm

    ISOVER Spacesaver Wool Insulation Roll 14.13m2 100 x 1160 x 12180mm

    ISOVER Spacesaver is a glass mineral wool roll available in a range of thicknesses from 100-200mm, and supplied pre-perforated to 3 x 386mm and 2 x 580mm width to fit between common joists. The economical and easy-to-install glass mineral wool rolls...
  • Rockwool RWA45 Acoustic Insulation Slab 1200 x 600 x 100mm

    Rockwool RWA45 Acoustic Insulation Slab 1200 x 600 x 100mm

    Rockwool RWA45 Insulation Slabs 600 x 1200mm is a A1 stone wool insulation for general building applications. ROCKWOOL RWA45 is a general building slab designed for use as acoustic, thermal and fire protection of walls, ceilings, floors and roofs. The...
  • ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 100 x 9170mm ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 100 x 9170mm

    ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 100 x 9170mm

    Isover Acoustic Partition Roll (APR 1200) provides high levels of acoustic insulation in partitions, walls and floors to meet requirements in domestic and non-residential buildings. A glass mineral wool roll providing high levels of acoustic insulation...
  • ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 25 x 20000mm ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 25 x 20000mm

    ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 25 x 20000mm

    Isover Acoustic Partition Roll (APR 1200) provides high levels of acoustic insulation in partitions, walls and floors to meet requirements in domestic and non-residential buildings. A glass mineral wool roll providing high levels of acoustic insulation...
  • ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 50 x 13000mm ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 50 x 13000mm

    ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 50 x 13000mm

    Isover Acoustic Partition Roll (APR 1200) provides high levels of acoustic insulation in partitions, walls and floors to meet requirements in domestic and non-residential buildings. A glass mineral wool roll providing high levels of acoustic insulation...
  • ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 75 x 12200mm ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 75 x 12200mm

    ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600) x 75 x 12200mm

    Isover Acoustic Partition Roll (APR 1200) provides high levels of acoustic insulation in partitions, walls and floors to meet requirements in domestic and non-residential buildings. A glass mineral wool roll providing high levels of acoustic insulation...
  • ISOVER APR 1200 Acoustic Partition Insulation Loft Roll 12m2 (2 x 600) x 50 x 10,000mm ISOVER APR 1200 Acoustic Partition Insulation Loft Roll 12m2 (2 x 600) x 50 x 10,000mm

    ISOVER APR 1200 Acoustic Partition Insulation Loft Roll 12m2 (2 x 600) x 50 x 10,000mm

    ISOVER Acoustic Partition Roll (APR 1200) is a 600mm wide push-fit glass mineral wool, designed to fit between standard stud spacings, making installation as easy as possible. It provides high levels of acoustic insulation in partitions, walls and floors...
  • ISOVER Cavity Wall Slab 32 1200 x 455 x 100mm

    ISOVER Cavity Wall Slab 32 1200 x 455 x 100mm

    A higher-performing glass mineral wool full-fill cavity slab providing excellent thermal performance in masonry cavity walls to meet or exceed the requirements of Part L Building Regulations (England and Wales), enabling U-Values as low as 0.23 W/m2K...
  • ISOVER Cavity Wall Slab 32 Insulation 125 x 455 x 1200 2.73m2

    ISOVER Cavity Wall Slab 32 Insulation 125 x 455 x 1200 2.73m2

  • ISOVER Cavity Wall Slab 34 5.46m2 150mm x 455mm x 1200mm ISOVER Cavity Wall Slab 34 5.46m2 150mm x 455mm x 1200mm

    ISOVER Cavity Wall Slab 34 5.46m2 150mm x 455mm x 1200mm

    Quick and easy to install the ISOVER Cavity Wall Slab (CWS) 34 features strong, resilient, and flexible mineral wool slabs that are 455mm wide, to fit between standard wall tie spacing, saving you time and hassle on your project. Cavity Wall Slabs can be...
  • ISOVER Cavity Wall Slab 36 3.28m2 1200 x 455 x 150mm

    ISOVER Cavity Wall Slab 36 3.28m2 1200 x 455 x 150mm

    Isover Cavity Wall Slab 36
  • ISOVER Cavity Wall Slab 36 4.37m2 1200 x 455 x 125mm ISOVER Cavity Wall Slab 36 4.37m2 1200 x 455 x 125mm

    ISOVER Cavity Wall Slab 36 4.37m2 1200 x 455 x 125mm

    Whether you're looking for an insulation wool slab that is easy to install, offers exceptional thermal performance. BBA certified for supporting Building Regulations. The ISOVER Cavity Wall Slab (CWS) 36 is the product for the job. Manufactured from 75%...
  • ISOVER Cavity Wall Slab 36 6.55m2 1200 x 455 x 100mm

    ISOVER Cavity Wall Slab 36 6.55m2 1200 x 455 x 100mm

    CWS 36 is a glass mineral wool slab supplied in 50-150mm thicknesses. The strong, resilient, and flexible batts are 455mm wide to fit between standard wall tie spacing, for warmer rooms and greater occupant comfort.
  • ISOVER Cavity Wall Slab 36 6.55m2 1200 x 455 x 85mm

    ISOVER Cavity Wall Slab 36 6.55m2 1200 x 455 x 85mm

    When put in exterior masonry cavity walls, Isover Cavity Wall Slab (CWS) 36 is a glass mineral wool insulation that meets and exceeds UK thermal construction requirements. The sturdy, resilient flexible slabs are 455mm wide to fit between normal wall tie...
  • ISOVER RD Party Wall Insulation Roll 3.64m2- 150 x (2 x 455) x 4000mm ISOVER RD Party Wall Insulation Roll 3.64m2- 150 x (2 x 455) x 4000mm

    ISOVER RD Party Wall Insulation Roll 3.64m2- 150 x (2 x 455) x 4000mm

    You can save time and money when using the ISOVER RD Party Wall roll as part of a proprietary Robust Detail construction. Choosing this method removes the need for parge coats or wet plastering, as well as the need for costly pre-completion sound testing...
  • ISOVER RD Party Wall Insulation Roll 5.46m2 100 x (2 X 455) x 6500mm ISOVER RD Party Wall Insulation Roll 5.46m2 100 x (2 X 455) x 6500mm

    ISOVER RD Party Wall Insulation Roll 5.46m2 100 x (2 X 455) x 6500mm

  • ISOVER RD Party Wall Insulation Roll 7.74m2 75 x (2 X 455) x 8500mm ISOVER RD Party Wall Insulation Roll 7.74m2 75 x (2 X 455) x 8500mm

    ISOVER RD Party Wall Insulation Roll 7.74m2 75 x (2 X 455) x 8500mm

    The ISOVER RD Party Wall glass mineral wool roll is manufactured from up to 75% recycled glass making it a cost effective acoustic insulation used to reduce the passage of sound across a masonry party wall and minimise the air movement within the cavity,...
  • ISOVER Slab 32 Cavity Wall Insulation 150 x 455 x 1200mm (2.18m2) ISOVER Slab 32 Cavity Wall Insulation 150 x 455 x 1200mm (2.18m2)

    ISOVER Slab 32 Cavity Wall Insulation 150 x 455 x 1200mm (2.18m2)

    ISOVER Cavity Wall Slab (CWS) 32 is a glass mineral wool slab that is made from 75% recycled glass. Cavity Slab 32 offers exceptional thermal performance in external masonry cavity walls, with a thermal conductivity of 0.032 W/m.K. hence the name Slab 32...
  • ISOVER Slab 32 Cavity Wall Insulation 85 x 455 x 1200mm (4.37m2) ISOVER Slab 32 Cavity Wall Insulation 85 x 455 x 1200mm (4.37m2)

    ISOVER Slab 32 Cavity Wall Insulation 85 x 455 x 1200mm (4.37m2)

    Reduce heat loss within the building envelope and decrease energy costs with the ISOVER Cavity Wall Slab (CWS) 32. A glass mineral wool slab that is made from 75% recycled glass and offers a thermal conductivity of 0.032 W/m.K and exceptional thermal...
  • ISOVER Spacesaver Wool Insulation Roll 8.15m2 170 x 1160 x 7030mm ISOVER Spacesaver Wool Insulation Roll 8.15m2 170 x 1160 x 7030mm

    ISOVER Spacesaver Wool Insulation Roll 8.15m2 170 x 1160 x 7030mm

    ISOVER Spacesaver is a glass mineral wool roll supplied in a range of thicknesses from 100-200mm, and manufactured from up to 75% recycled glass. The economical and easy-to-install glass mineral wool rolls are suitable for loft insulation, where they are...

Glass wool insulation

What is Glass Wool insulation?

Sometimes referred to as Fibreglass Insulation, Glass Wool is created by blending together natural glass with recycled glass. The recycled glass could come from a variety of original products including car windscreens, glass bottles, and window panes. The glass is melted down and converted into glass fibres by pushing the hot mixture through a fine mesh and allowing it to cool naturally.

It can be used for a variety of purposes including:

Acoustic Insulation – Reducing noise passing from one area of a building to another in situations where compressive strength is not needed. Acoustic Insulation is often called Fibreglass Batts.
Resistance against water – When used in Cavity Walls, Fibreglass is effective because it can be engineered to meet the conditions of the wall.
Fire Resistant – Despite common misconceptions, Fibreglass Insulation is non-combustible, meaning that it won’t burn. In fact, it has a European A1 fire classification. Therefore, it will be effective during a building fire.
Thermal Performance – Glass Wool is a cost-effective and versatile option for thermal performance, that is more thermally efficient than alternatives, meaning that it can achieve the same results as other choices but with half the weight.

Where can Glass Wool be used?

There are many situations where Glass wool can be used:

Lofts – A good insulation in your loft is crucial, as it will save on two key areas of your life: money and energy. Our Spacesaver range of loft insulation offers thermal performance and is supplied in thin rolls of Glass Wool that take up less space, without compromising on strength or resilience.
Walls with Building Specifications – Quite often walls need to be built to specific specifications to pass Building Regulations. RD35 is a high-density glass rock that is slim but designed to meet a variety of wall construction regulations.
Partition Walls – Party Walls are those located within a building, that divide rooms from each other. Thermal insulation is commonly needed here to prevent sounds travelling too easily through the walls.
External Timber Frame Walls – Glass Wool offers a variety of benefits to external walls, including thermal and acoustic performance to ensure a building remains warm, whilst preventing sounds from passing through.

Frequently Asked Questions

How much loft insulation do I need?
To work out how much loft insulation you need, you should first measure the thickness of your current insulation and work out how much you will need to take the depth to 270mm. Next, you should measure the total area of your loft. This can be done by measuring both the length and width of the space in metres and multiply the length by the width, which will give you the square metre area (m2) of your loft. For example, if the total area in m2 is 50, you will need 8 rolls of insulation.
How thick should loft insulation be?
Insulation should be around 200mm to 270mm thick.
How much is loft insulation?
The average cost of loft insulation is between £5 and £11 per square metre.
Is loft insulation flammable?
Loft insulation is non-combustible.
What is loft insulation made of?
Loft insulation is made of glass fibre, sheep’s wool, hemp, or recycled polyester.

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