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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 Sound Insulation Slab 1200 x 400mm Rockwool Sound Insulation Slab 1200 x 400mm

    Rockwool Sound Insulation Slab 1200 x 400mm

    £37.96 - £40.21 per pack (Ex VAT)
    £45.55 - £48.25 per pack (Inc VAT)
    Rockwool Sound Insulation Slab 400 x 1200mm A1 Fire resilient stone wool insulation slabs optimised for sound proofing. ROCKWOOL Sound Slab is used to create quiet, peaceful and comfortable spaces in both residential and commercial environments. Being...
  • ISOVER Spacesaver Wool Insulation Loft Roll ISOVER Spacesaver Wool Insulation Loft Roll

    ISOVER Spacesaver Wool Insulation Loft Roll

    £48.92 - £58.05 per roll (Ex VAT)
    £58.70 - £69.66 per roll (Inc VAT)
    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 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...
  • Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm

    Rockwool RWA45 Acoustic Insulation Slab 1200 x 600mm

    £31.42 - £39.32 per pack (Ex VAT)
    £37.70 - £47.18 per pack (Inc VAT)
    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...
  • Rockwool Sound Insulation Slab 1200 x 600mm Rockwool Sound Insulation Slab 1200 x 600mm

    Rockwool Sound Insulation Slab 1200 x 600mm

    £57.27 - £62.87 per pack (Ex VAT)
    £68.72 - £75.44 per pack (Inc VAT)
    Nuisance noise doesn’t always come from external sources. Whether in a living or working environment, controlling the passage of sound between internal spaces can make the difference between a peaceful experience… or a much more stressful one. The...
  • ISOVER APR 1200 Acoustic Partition Insulation Loft Roll (2 x 600mm)

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

    £62.04 - £84.98 per roll (Ex VAT)
    £74.45 - £101.98 per roll (Inc VAT)
    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 Cavity Wall Slab 36 455 x 1200mm (Various Thickness)

    ISOVER Cavity Wall Slab 36 455 x 1200mm (Various Thickness)

    £42.66 - £57.34 per pack (Ex VAT)
    £51.19 - £68.81 per pack (Inc VAT)
    ISOVER Cavity Wall Slab 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 RD Party Wall Insulation Roll ISOVER RD Party Wall Insulation Roll

    ISOVER RD Party Wall Insulation Roll

    £66.20 - £70.57 per roll (Ex VAT)
    £79.44 - £84.68 per roll (Inc VAT)
    The ISOVER RD Party Wall glass mineral wool roll is 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, improving its thermal performance. Available in a...
  • ISOVER Cavity Wall Slab 34 ISOVER Cavity Wall Slab 34

    ISOVER Cavity Wall Slab 34

    ISOVER Cavity Wall Slab (CWS) 34 is a BBA certified glass mineral wool slab, made from 75% recycled glass. Cavity Slab 34 offers exceptional thermal performance in external masonry cavity walls and with thermal conductivity of 0.034 W/m.K. it can reduce...
  • ISOVER Slab 32 Cavity Wall Insulation 455 x 1200mm

    ISOVER Slab 32 Cavity Wall Insulation 455 x 1200mm

    £60.24 - £68.17 per pack (Ex VAT)
    £72.29 - £81.80 per pack (Inc VAT)
    ISOVER Cavity Wall Slab (CWS) 32 is a BBA certified 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...
  • Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 400mm

    Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 400mm

    £39.50 - £42.35 per pack (Ex VAT)
    £47.40 - £50.82 per pack (Inc VAT)
    Rockwool FLEXI® 400 x 1200mm is a A1 multi use, dual purpose thermal and acoustic insulation product that offers perfect friction fit for framed constructions. ROCKWOOL FLEXI® is a unique, flexible edged insulation product, developed using patented...
  • Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 600mm

    Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 600mm

    £55.68 - £63.52 per pack (Ex VAT)
    £66.82 - £76.22 per pack (Inc VAT)
    Rockwool FLEXI® 100 x 600 x 1200mm is an A1 insulation slab that offers perfect friction fit for framed constructions. ROCKWOOL FLEXI® is a unique, flexible edged insulation product, developed using patented technology for a fast and easy, secure...
  • Rockwool Full Fill Cavity Batt Insulation 1200 x 455mm

    Rockwool Full Fill Cavity Batt Insulation 1200 x 455mm

    £45.79 - £56.96 per pack (Ex VAT)
    £54.95 - £68.35 per pack (Inc VAT)
    The Rockwool Full Fill Cavity Batt 455 x 1200mm is a A1 insulation slab for masonry cavity walls. ROCKWOOL® Cavity insulation is a full-fill insulation solution for masonry cavity wall construction, suitable for use in new builds and extensions...
  • Rockwool PWCB Party Wall Cavity Barrier Insulation 1200 x 200mm

    Rockwool PWCB Party Wall Cavity Barrier Insulation 1200 x 200mm

    £170.54 - £232.97 per pack (Ex VAT)
    £204.65 - £279.56 per pack (Inc VAT)
    Rockwool Party Wall Cavity Barriers or PWCBs, work to improve a building’s safety by preventing the spread of fire within concealed voids. By specifying and installing the TCB Cavity Barrier or PWCB Cavity Barrier, they provide essential protection...
  • Rockwool RW3 Acoustic Insulation Slab 1200 x 600mm

    Rockwool RW3 Acoustic Insulation Slab 1200 x 600mm

    £38.24 - £48.53 per pack (Ex VAT)
    £45.89 - £58.24 per pack (Inc VAT)
    Rockwool RW3 Acoustic 600 x 1200mm insulation slab is a A1 fire rated a stone wool insulation slab for general building applications. ROCKWOOL RW3 is a general building slab designed for use as acoustic, thermal and fire protection of walls, ceilings,...
  • Rockwool TCB Thermal Cavity Barrier Insulation 1200mm

    Rockwool TCB Thermal Cavity Barrier Insulation 1200mm

    £70.13 - £98.47 per pack (Ex VAT)
    £84.16 - £118.16 per pack (Inc VAT)
    Rockwool Thermal Cavity Barriers 1200mm are A1 insulation fire protection that work to improve a building’s safety by preventing the spread of fire within concealed voids. By specifying and installing the TCB Cavity Barrier or PWCB Cavity Barrier, they...
  • Rockwool Thermal Acoustic Insulation Roll 3650 x 1200 x 150mm

    Rockwool Thermal Acoustic Insulation Roll 3650 x 1200 x 150mm

    The Rockwoold Insulation Roll 150 x 1200 x 3650mm is an A1 fire rated thermal and acoustic insulation Roll. ROCKWOOL® Roll is pre-split into two 100mm layers, enabling fast fitting into loft joists. The rolls provide excellent medium density thermal,...
  • Rockwool Thermal Insulation Cavity Batt Insulation 1200 x 455 x 100mm

    Rockwool Thermal Insulation Cavity Batt Insulation 1200 x 455 x 100mm

    The Rockwool Thermal Insulation Cavity Batt 100 x 455 x 1200mm is an A1 fire rated Thermal protection insulation for masonry cavity walls. ROCKWOOL Thermal Cavity Batts are a semi-rigid full fill insulation solution for use in external and party masonry...
  • Rockwool Thermal Timber Frame Insulation Slab 1200 x 570 x 140mm

    Rockwool Thermal Timber Frame Insulation Slab 1200 x 570 x 140mm

    The Rockwool Thermal Timber Frame Slab 140 x 570 x 1200mm is an A1 fire rated Thermal, fire and acoustic insulation slab for timber frames. The Thermal Timber Frame Slabs are designed for use in timber frame constructions. The 570mm slab width makes...

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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