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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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  • 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...
  • 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.
  • Unilin CavityTherm 100-150 Vent Panel 375 x 265 x 45mm

    Unilin CavityTherm 100-150 Vent Panel 375 x 265 x 45mm

    A preformed insulation panel that creates an insulated Service Void for Periscopic Floor Vents in suspended floor situations.
  • Unilin CavityTherm Full Fill Cavity Tray Insulation PIR Board 1200 x 350mm

    Unilin CavityTherm Full Fill Cavity Tray Insulation PIR Board 1200 x 350mm

    The Cavitytherm Full Fill Channel is an insulated channel to allow for insulation continuity around stepped cavity trays at gable junctions.
  • Unilin CavityTherm Full Fill Ext Corner Insulation PIR Board 1200 x 450mm

    Unilin CavityTherm Full Fill Ext Corner Insulation PIR Board 1200 x 450mm

    £27.91 - £36.88 per sheet (Ex VAT)
    £33.49 - £44.26 per sheet (Inc VAT)
    CavityTherm Corner Fill is a preformed panel of CavityTherm that folds to provide a 90° corner either external or internal. Corner boards ensure excellent detailing and provide a template for setting out of outer brickwork.
  • Unilin CavityTherm Full Fill Insulation PIR Board 1200 x 450mm

    Unilin CavityTherm Full Fill Insulation PIR Board 1200 x 450mm

    £26.23 - £36.88 per sheet (Ex VAT)
    £31.48 - £44.26 per sheet (Inc VAT)
    CavityTherm is an innovative built-in insulation for traditional walls that achieves passive level U-Values as low as 0.12 W/m2K with excellent thermal bridging detailing in cavities less than 150mm wide. The board includes specifically designed rebated...
  • Unilin CavityTherm Full Fill Int Corner Insulation PIR Board 1200 x 450mm

    Unilin CavityTherm Full Fill Int Corner Insulation PIR Board 1200 x 450mm

    £27.91 - £36.88 per sheet (Ex VAT)
    £33.49 - £44.26 per sheet (Inc VAT)
    CavityTherm Corner Fill is a preformed panel of CavityTherm that folds to provide a 90° corner either external or internal. Corner boards ensure excellent detailing and provide a template for setting out of outer brickwork.
  • Unilin CavityTherm Full Fill Riser Insulation PIR Panel 1200 x 225mm

    Unilin CavityTherm Full Fill Riser Insulation PIR Panel 1200 x 225mm

    £27.91 - £36.90 per sheet (Ex VAT)
    £33.49 - £44.28 per sheet (Inc VAT)
    The CavityTherm half board allows you to position your insulation at floor levels and positions it directly under the Decks Post-Insulation-Riser (DIP). The CavityTherm can be used on individual floors as well as shared walls, thereby increasing thermal...
  • Unilin CavityTherm Full Fill Top Insulation PIR Panel 1200 x 225mm

    Unilin CavityTherm Full Fill Top Insulation PIR Panel 1200 x 225mm

    £27.91 - £36.90 per sheet (Ex VAT)
    £33.49 - £44.28 per sheet (Inc VAT)
    A CavityTherm half-board that is used to finish wall insulation heights when a full board is not required. Uses less materials and generates less waste than traditional methods.
  • Unilin CavityTherm150 Hockey Service V Insulation PIR Board 1200 x 75mm

    Unilin CavityTherm150 Hockey Service V Insulation PIR Board 1200 x 75mm

    £46.83 - £52.05 per sheet (Ex VAT)
    £56.20 - £62.46 per sheet (Inc VAT)
    Hockey Service voids allows for easy access to the cable that supplies the meter box and is preformed to fit the insulation. It has a frost line of 28mm, with an R value of 6.9m2k/w
  • Unilin CavityTherm150 Meter Box Insulation PIR Panel 1200 x 600mm

    Unilin CavityTherm150 Meter Box Insulation PIR Panel 1200 x 600mm

    £27.98 - £35.73 per sheet (Ex VAT)
    £33.58 - £42.88 per sheet (Inc VAT)
    The preformed meter box accessory allows a recess space for placement of meter box, leaving the insulation to run in a continuous plane. The CavityTherm150 Meter Box Preform is based on the CavityTherm140 but with a tighter specification for more precise...
  • Unilin ECO Cavity Wall Rebate Edge Insulation PIR Board 1200 x 450mm

    Unilin ECO Cavity Wall Rebate Edge Insulation PIR Board 1200 x 450mm

    £25.70 - £28.26 per sheet (Ex VAT)
    £30.84 - £33.91 per sheet (Inc VAT)
    Cavity Wall 360 is a bio-enhanced partial fill wall insulation system. The system incorporates robust facings, engineered jointing details, pre-formed corners and has a certified Lambda of 0.020 W/mK.
  • Unilin ECO CavityTherm Full Fill Insulation PIR Board 1200 x 450mm

    Unilin ECO CavityTherm Full Fill Insulation PIR Board 1200 x 450mm

    £27.59 - £34.23 per sheet (Ex VAT)
    £33.11 - £41.08 per sheet (Inc VAT)
    Our CavityTherm 360 system is a bio-enhanced high performance composite board of enhanced PIR with a Lambda value as low as 0.020 W/mK for full fill cavity wall applications. When built into a traditional 110-150mm cavity using standard foundation...
  • Unilin ECO CavityTherm Internal Corner Insulation PIR Board 1200 x 450mm

    Unilin ECO CavityTherm Internal Corner Insulation PIR Board 1200 x 450mm

    £27.59 - £34.23 per sheet (Ex VAT)
    £33.11 - £41.08 per sheet (Inc VAT)
    Unilin ECO CavityTherm 360 is a bio-enhanced high performance composite board of enhanced PIR with a Lambda value as low as 0.020 W/mK, providing you with a comprehensive package to help you achieve your energy efficient ambitions.
  • Unilin ECO Multi Application Insulation PIR Board 2400 x 1200mm Unilin ECO Multi Application Insulation PIR Board 2400 x 1200mm

    Unilin ECO Multi Application Insulation PIR Board 2400 x 1200mm

    £123.52 - £185.24 per sheet (Ex VAT)
    £148.22 - £222.29 per sheet (Inc VAT)
    Unilin / Xtratherm ECO360 multi application insulation PIR board is a bio-enhanced, superior performance PIR insulation suitable for solid and suspended floors. ECO360 MA for floors offers excellent insulation performance with thermal conductivity of 0...
  • Unilin Roof Thermal Ply Insulation PIR Board 2400 x 1200mm

    Unilin Roof Thermal Ply Insulation PIR Board 2400 x 1200mm

    £95.67 - £197.35 per sheet (Ex VAT)
    £114.80 - £236.82 per sheet (Inc VAT)
    Unilin / Xtratherm FR/TP Thermal Ply is a composite insulated panel of Unilin / Xtratherm Polyisocyanurate core with a composite foil facer, bonded to 6mm WBP grade plywood. FR/TP is designed to provide high levels of thermal insulation and decking in...
  • Unilin Safe-R Cavity Wall Insulation PIR Board 1200 x 450mm

    Unilin Safe-R Cavity Wall Insulation PIR Board 1200 x 450mm

    £11.88 - £23.36 per sheet (Ex VAT)
    £14.26 - £28.03 per sheet (Inc VAT)
    Our Safe-R SR/CW Cavity Wall Insulation is an aircrete insulation for traditional masonry cavity walls. The product is designed to achieve excellent U-Values whilst maintaining a residual cavity, offering protection from wind driven rain.
  • Unilin Safe-R Pitched Roof Insulation PIR Board 2400 x 1200mm

    Unilin Safe-R Pitched Roof Insulation PIR Board 2400 x 1200mm

    £38.10 - £136.50 per sheet (Ex VAT)
    £45.72 - £163.80 per sheet (Inc VAT)
    SR/PR on sloped roofs (ventilated, hybrid or warm) provides the most efficient U-values with minimal intrusion into valuable living space. The roof construction is a critical element in the building fabric and is an area at high risk of heat loss. Using...
  • Unilin Safe-R Soffit Insulation PIR Board 2400 x 1200mm

    Unilin Safe-R Soffit Insulation PIR Board 2400 x 1200mm

    £62.49 - £115.47 per sheet (Ex VAT)
    £74.99 - £138.56 per sheet (Inc VAT)
    Safe-R Soffit SR/ST provides effective thermal and fire performance solutions in structural ceiling applications in commercial and residential buildings. This high performance phenolic insulation board is faced with composite foil facings. Safe-R Soffit...
  • Unilin Safe-R Underfloor Insulation PIR Board 2400 x 1200mm

    Unilin Safe-R Underfloor Insulation PIR Board 2400 x 1200mm

    £38.01 - £112.24 per sheet (Ex VAT)
    £45.61 - £134.69 per sheet (Inc VAT)
    Safe-R Under Floor SR/UF is a superior performance rigid phenolic insulation with low emissivity aluminium facings both sides and has a thermal conductivity as low as 0.020 W/mK, delivering excellent U-values in floors. The floor in any building is an...
  • Unilin SafeR Thermal Insulation PIR Board DD 2400 x 1200mm

    Unilin SafeR Thermal Insulation PIR Board DD 2400 x 1200mm

    £70.74 - £128.21 per sheet (Ex VAT)
    £84.89 - £153.85 per sheet (Inc VAT)
    Unilin / Xtratherm SafeR Thermal Insulation PIR Board is a composite insulated panel that combines Unilin / Xtratherm phenolic insulation with a glass tissue facing bonded to 12.5mm tapered edge plasterboard for internal applications, fixed with...

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

Isover Insulation - Learn more about Isover and their types of insulation boards.

How to insulate a garage

A step-by-step guide on how to insulate your garage.