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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  • Celotex XR4125 PIR Insulation Board 1200 x 2400 x 125mm Celotex XR4125 PIR Insulation Board 1200 x 2400 x 125mm

    Celotex XR4125 PIR Insulation Board 1200 x 2400 x 125mm

    Celotex XR4125 is a rigid polyisocyanurate (PIR) insulation board that is high preforming, it offers excellent thermal performance with a thermal conductivity of 0.022 W/m.K. With a low emissivity foil facing it can also offer enhanced thermal...
  • Ecotherm Eco Versal PIR Insulation Board 2400 x 1200 x 35mm

    Ecotherm Eco Versal PIR Insulation Board 2400 x 1200 x 35mm

    EcoTherm Eco-Liner dry lining insulation board is fibre free and enables internal wall insulation in one easy application without impacting on the interior space. EcoTherm Eco-Liner is perfect for insulating from the inside which upgrades the thermal...
  • Ecotherm Eco Liner PIR Dry Lining Insulation Board 2400 x 1200 x 52.5mm Ecotherm Eco Liner PIR Dry Lining Insulation Board 2400 x 1200 x 52.5mm

    Ecotherm Eco Liner PIR Dry Lining Insulation Board 2400 x 1200 x 52.5mm

    Eco Liner is a 2-in-1 plasterboard which can be fitted either mechanically or using the dot and dab process. It has many applications and can be used for cavity, solid and timber internal walls. It can also be used on flat and pitched roofs and in loft...
  • Ecotherm Eco Cavity PIR Insulation Board Tongue & Grooved 1200 x 450 x 50mm

    Ecotherm Eco Cavity PIR Insulation Board Tongue & Grooved 1200 x 450 x 50mm

    Eco-Cavity is rigid polyisocyanurate foam with aluminium foil composite on both sides. It is a high performance insulation used as a full cavity fill within traditionally built masonry walls. It is conveniently sized so that the boards co-ordinate with...
  • TLX Silver Multi-Foil Insulation Roll 1200 x 10,000mm

    TLX Silver Multi-Foil Insulation Roll 1200 x 10,000mm

    TLX silver is a thin, flexible multi-foil insulation that is easy to handle and fast to fit. It is the first fully-registered multi-foil insulation that is air and vapour tight and saves space in loft conversions.
  • ISOVER Slab 32 Cavity Wall Insulation 50 x 455 x 1200mm (7.64m2) ISOVER Slab 32 Cavity Wall Insulation 50 x 455 x 1200mm (7.64m2)

    ISOVER Slab 32 Cavity Wall Insulation 50 x 455 x 1200mm (7.64m2)

    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...
  • ISOVER RD Party Wall Insulation Roll ISOVER RD Party Wall Insulation Roll

    ISOVER RD Party Wall Insulation Roll

    £49.04 - £52.26 (Ex VAT)
    £58.85 - £62.71 (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 36

    ISOVER Cavity Wall Slab 36

    £35.14 - £42.48 (Ex VAT)
    £42.17 - £50.98 (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 Cavity Wall Slab 34 ISOVER Cavity Wall Slab 34

    ISOVER Cavity Wall Slab 34

    £115.74 - £116.09 (Ex VAT)
    £138.89 - £139.31 (Inc VAT)
    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 Cavity Wall Slab 32

    ISOVER Cavity Wall Slab 32

    £44.65 - £58.14 (Ex VAT)
    £53.58 - £69.77 (Inc VAT)
    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 Acoustic Insulation Partition Roll+O16344

    ISOVER Acoustic Insulation Partition Roll+O16344

    £44.71 - £61.34 (Ex VAT)
    £53.65 - £73.61 (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 Spacesaver Wool Insulation Roll ISOVER Spacesaver Wool Insulation Roll

    ISOVER Spacesaver Wool Insulation Roll

    £34.53 - £40.98 (Ex VAT)
    £41.44 - £49.18 (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 274413 SOUND INSULATION SLAB 1200x600x50

    ROCKWOOL 274413 SOUND INSULATION SLAB 1200x600x50

    £54.04 - £57.61 (Ex VAT)
    £64.85 - £69.13 (Inc VAT)
    The Sound Insulation Slab is designed to be used to reduce noise between rooms in a building and between connecting properties. It does this by dampening vibration-based noise as it travels through structures, whilst reducing sound waves as they transmit...
  • IO1278 POLYSTYRENE SDN FLOORING 2400x1200x150mm

    IO1278 POLYSTYRENE SDN FLOORING 2400x1200x150mm

    £6.00 - £23.97 (Ex VAT)
    £7.20 - £28.76 (Inc VAT)
    Expanded polystyrene comes in a wide variety of shapes and sizes. Within the construction industry, 2400 x 1200mm. EPS is a combustible material but providing it is installed correctly in accordance with the manufacturers' instructions, it will not...
  • Celotex PIR Insulation Board Celotex PIR Insulation Board

    Celotex PIR Insulation Board

    £18.29 - £133.50 (Ex VAT)
    £21.95 - £160.20 (Inc VAT)
    Celotex XR4110 is a high performance rigid polyisocyanurate (PIR) insulation board that is extremely lightweight making it very easy to handle, transport and extremely easy to install due to its rigid nature. Being a high performance PIR insulation...
  • Celotex Thermal PIR Insulation Board Celotex Thermal PIR Insulation Board

    Celotex Thermal PIR Insulation Board

    £48.59 - £62.99 (Ex VAT)
    £58.31 - £75.59 (Inc VAT)
    Celotex PL4000 range is an easy to install rigid polyisocyanurate (PIR) insulation board with a paper facing, laminated to a sheet of 12.5mm plasterboard with a tapered edge. This combination board of plasterboard and insulation saves time and hassle on...
  • Celotex PIR Cavity Wall Insulation Celotex PIR Cavity Wall Insulation

    Celotex PIR Cavity Wall Insulation

    £6.05 - £14.23 (Ex VAT)
    £7.26 - £17.08 (Inc VAT)
    The Celotex CW4000 range are high performance insulation boards for Cavity Walls. It features low emissivity foil facings giving improved thermal insulation performance within cavity air spaces, when compared to typical PIR products. This PIR insulation...

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

Unsure how to keep your keep your heating costs down? Read this article on types of insulation and more.


What is the Green Homes Grant?

The £2 billion grant aims to encourage homeowners to make their homes more energy efficient, benefitting the environment as well as protecting and creating jobs.