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Insulation

Insulation is a great energy saver and comes in various materials. There are many types available including glass wool, fibreglass insulation, polystyrene, pipe and foil insulation. Insulation can and should be used in many areas in your property such as the loft, flooring, cavities and solid wall insulation. 

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  • 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 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...
  • Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 400 x 100mm

    Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 400 x 100mm

    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 400 x 140mm

    Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 400 x 140mm

    Rockwool FLEXI® 140x400x1200 is a A1 multi use, dual purpose thermal and acoustic insulation product that perfect friction fit for framed constructions. ROCKWOOL FLEXI® is a unique, flexible edged insulation product, developed using patented technology...
  • Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 600 x 100mm

    Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 600 x 100mm

    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 Flexi Thermal Acoustic Insulation Slab 1200 x 600 x 90mm

    Rockwool Flexi Thermal Acoustic Insulation Slab 1200 x 600 x 90mm

    Rockwool FLEXI® 90 x 600 x 1200mm A1 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 RWA45 Acoustic Insulation Slab 1200 x 600 x 25mm

    Rockwool RWA45 Acoustic Insulation Slab 1200 x 600 x 25mm

    Rockwool RWA45 25x600x1200 A1 ROCKWOOL RWA45 is a 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 RWA45 Acoustic Insulation Slab 1200 x 600 x 50mm

    Rockwool RWA45 Acoustic Insulation Slab 1200 x 600 x 50mm

    Rockwool RWA45 50x600x1200 A1 ROCKWOOL RWA45 is a 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 RWA45 Acoustic Insulation Slab 1200 x 600 x 60mm

    Rockwool RWA45 Acoustic Insulation Slab 1200 x 600 x 60mm

    Rockwool RWA45 60x600x1200 A1 ROCKWOOL RWA45 is a 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 RWA45 Acoustic Insulation Slab 1200 x 600 x 75mm

    Rockwool RWA45 Acoustic Insulation Slab 1200 x 600 x 75mm

    Rockwool RWA45 75x600x1200 A1 ROCKWOOL RWA45 is a 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 400 x 100mm Rockwool Sound Insulation Slab 1200 x 400 x 100mm

    Rockwool Sound Insulation Slab 1200 x 400 x 100mm

    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...
  • Rockwool Sound Insulation Slab 1200 x 400 x 50mm Rockwool Sound Insulation Slab 1200 x 400 x 50mm

    Rockwool Sound Insulation Slab 1200 x 400 x 50mm

    Rockwool Sound Insulation Slab 50 x 400 x 1200mm is an 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...
  • Rockwool Sound Insulation Slab 1200 x 600 x 100mm Rockwool Sound Insulation Slab 1200 x 600 x 100mm

    Rockwool Sound Insulation Slab 1200 x 600 x 100mm

    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...
  • Rockwool Sound Insulation Slab 1200 x 600 x 50mm Rockwool Sound Insulation Slab 1200 x 600 x 50mm

    Rockwool Sound Insulation Slab 1200 x 600 x 50mm

    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...

Insulation

Insulation is an effective way to save energy in your home or property, as it helps to prevent draughts as well as energy from depleting out of the building, ultimately wasting money. Insulating your loft or attic is a simple and effective way to reduce heat loss and reduce your overall heating bill. Loft insulation is effective for at least 40 years.

Whilst saving energy is the most common incentive for home and property owners, there are many other reasons as to why you might want to install insulation. Insulation can prevent sound from travelling either around your home or between you and neighbouring houses. Good insulation also helps to prevent mould and condensation from appearing in your home, which is often caused by the differing temperatures of your internal and external walls. Insulation can also form part of your home’s resistance against the quick spread of fire.

There are a variety of different insulation products that we offer at Howarth and knowing which one to purchase will be determined by where you wish to use it and what you want to achieve from it, such as:

Glass wool, which is suitable for lofts and a variety of walls. Glass wool is manufactured from recycled glass, and it is not combustible, so it is ideal for offering both acoustic and thermal performance, as well as being water-resistant. It can also act as a cavity wall insulation, which means that it will trap the air in the insulation material that has been injected into the cavity. The clever use of materials helps trap warm air and prevent air circulating. As a result, heat loss is prevented using conduction and convection.

PIR boards are a rigid insulation board that can be used in walls, flooring, and lofts.

Polystyrene is ideal for walls, flooring and under concrete. It offers an excellent thermal insulator property as an insulation board, and it is also very easy to work with.

Rockwool is a stone-based insulation, which is suitable for cavities, partitions, and external walls, as well as floors and lofts.

Pipe insulation is used to insulate all hot and cold-water pipes, including radiators and boiler systems. These are designed to prevent pipes from freezing during the cooler months.

For further information and expert advice about insulation, please contact your friendly local Howarth branch.

Frequently Asked Questions

How thick should loft insulation be?
The recommended depth for loft isolation is 270 millimetres for glass wool, 250 millimetres for rock wool, or 220 millimetres for cellulose.
How much is loft insulation?
The average loft insulation cost is between £5 and £11 per square metre. This means that it should cost no more than about £1250 to insulate a 4-bedroom detached home.
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.

How to guides

Insulation for every application

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Celotex Insulation

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Isover Insulation

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