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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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  • Unilin Thin-R Cavity Wall Corner T&G Insulation PIR Board 1200 x 450mm

    Unilin Thin-R Cavity Wall Corner T&G Insulation PIR Board 1200 x 450mm

    £7.97 - £13.71 per sheet (Ex VAT)
    £9.56 - £16.45 per sheet (Inc VAT)
    Unilin / Xtratherm Thin-R Cavity Wall XT/CW (T&G) features engineered tongue and grooved joints and pre-formed corners, ensuring insulation continuity and minimisation of thermal bridging. Each element automatically builds to a system thanks to it's...
  • Unilin Thin-R Cavity Wall Insulation PIR Board 1200 x 450mm

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

    £7.52 - £12.94 per sheet (Ex VAT)
    £9.02 - £15.53 per sheet (Inc VAT)
    Thin-R CW is pre-formed to a system, building to the highest thermal standards whilst maintaining a residual cavity, offering protection from wind driven rain. XT/CW (T&G) for use in traditional masonry walls, builds to the highest thermal standards...
  • Unilin Thin-R Cavity Wall Plus Corner Insulation PIR Board T&G 1200 x 450mm

    Unilin Thin-R Cavity Wall Plus Corner Insulation PIR Board T&G 1200 x 450mm

    £10.48 - £19.22 per sheet (Ex VAT)
    £12.58 - £23.06 per sheet (Inc VAT)
    Unilin / Xtratherm Cavity Wall Plus XT/CWP (T&G) builds to a system thanks to its engineered tongue and grooved joints and pre-formed corners, ensuring insulation continuity and minimisation of thermal bridging. The Cavity Wall Plus tongue and groove...
  • Unilin Thin-R Cavity Wall Plus Insulation PIR Board T&G 1200 x 450mm

    Unilin Thin-R Cavity Wall Plus Insulation PIR Board T&G 1200 x 450mm

    £10.48 - £19.22 per sheet (Ex VAT)
    £12.58 - £23.06 per sheet (Inc VAT)
    Unilin / Xtratherm Cavity Wall Plus (T&G) builds to a system thanks to its engineered tongue and grooved joints and pre-formed corners, ensuring insulation continuity and minimisation of thermal bridging. The Cavity Wall Plus tongue and groove jointing...
  • Unilin Thin-R Cavity Wall T&G Insulation PIR Board 1200 x 450mm

    Unilin Thin-R Cavity Wall T&G Insulation PIR Board 1200 x 450mm

    £8.86 - £13.88 per sheet (Ex VAT)
    £10.63 - £16.66 per sheet (Inc VAT)
    Unilin / Xtratherm Thin-R Cavity Wall XT/CW (T&G) insulation builds to a system, thanks to its engineered tongue and grooved joints and pre-formed corners. This ensures insulation continuity and minimisation of thermal bridging. XT/CW (T&G) is made for...
  • Unilin Thin-R Flat Roof ALU Single Ply Insulation PIR Board 2400 x 1200mm

    Unilin Thin-R Flat Roof ALU Single Ply Insulation PIR Board 2400 x 1200mm

    £38.76 - £144.92 per sheet (Ex VAT)
    £46.51 - £173.90 per sheet (Inc VAT)
    Unilin / Xtratherm FR/ALU is a high performance Polyisocyanurate flat roof insulation with vapour-tight aluminium foil facings suitable for use with single ply membranes. Designed to fit and seal the full range of single ply roofing systems. The unique...
  • Unilin Thin-R Flat Roof BGM Insulation PIR Board 1200 x 600mm

    Unilin Thin-R Flat Roof BGM Insulation PIR Board 1200 x 600mm

    £9.90 - £37.00 per sheet (Ex VAT)
    £11.88 - £44.40 per sheet (Inc VAT)
    Unilin / Xtratherm ThinR Flat Roof BGM Insulation PIR Board is ideal for use with partially bonded, torched-on and built-up bituminous felt systems. Built-up Bituminous Felt (BGF) is faced with a polypropylene fleece finished bitumen/glass fibre working...
  • Unilin Thin-R Flat Roof MG Single Ply Insulation PIR Board 1200 x 600mm

    Unilin Thin-R Flat Roof MG Single Ply Insulation PIR Board 1200 x 600mm

    £10.45 - £39.07 per sheet (Ex VAT)
    £12.54 - £46.88 per sheet (Inc VAT)
    Unilin / Xtratherm TR/MG is a high performance Polyisocyanurate with mineral coated glass facers suitable for use below single ply fully adhered roof membranes, single ply waterproofing systems and partially bonded built-up felt. Especially suited in...
  • Unilin Thin-R Plus Hyfloor Insulation PIR Board T&G 2400 x 1200mm

    Unilin Thin-R Plus Hyfloor Insulation PIR Board T&G 2400 x 1200mm

    £57.10 - £106.10 per sheet (Ex VAT)
    £68.52 - £127.32 per sheet (Inc VAT)
    An unbeatable choice in all thermal insulation, Hyfloor (T&G) has a superior thickness to performance ratio allowing the lower targets required under Building Regulations. XT/HYF (T&G) tongue and groove jointing offers a practical on-site solution that...
  • Unilin Thin-R Polyiso Strips Insulation PIR Board 25mm

    Unilin Thin-R Polyiso Strips Insulation PIR Board 25mm

    £20.55 - £126.69 per sheet (Ex VAT)
    £24.66 - £152.03 per sheet (Inc VAT)
    Unilin / Xtratherm Thin-R XT/STR is a CFC/HCFC free, rigid polyisocyanurate (PIR) core faced each side with low emissivity foil. Pre-cut to minimise thermabridging at floor and wall junctions, thanks to its unique gasketed lap joint system which...
  • Unilin XT Thermal Liner MF Insulation PIR Board 2400 x 1200mm

    Unilin XT Thermal Liner MF Insulation PIR Board 2400 x 1200mm

    £45.90 - £68.52 per sheet (Ex VAT)
    £55.08 - £82.22 per sheet (Inc VAT)
    Unilin / Xtatherm XT Thermal Liner MF Insulation PIR Board is a composite insulated panel of Xtratherm PIR insulation core with a composite foil facing bonded to 12.5mm tapered edge plasterboard for internal walls, sloped roofs and ceilings. XT/TL-MF is...
  • Unilin XtroLiner Cavity Wall Insulation PIR Board 1200 x 450mm

    Unilin XtroLiner Cavity Wall Insulation PIR Board 1200 x 450mm

    £18.38 - £22.40 per sheet (Ex VAT)
    £22.06 - £26.88 per sheet (Inc VAT)
    XO/CW is an innovative partial fill cavity wall insulation system incorporating robust facings, engineered jointing details, preformed corners and a certified lambda of 0.021 W/mK. This lower lambda improves U-Values and meets Zero Carbon standards,...
  • Unilin XtroLiner Cavity Wall Insulation PIR Board T&G 1200 x 450mm

    Unilin XtroLiner Cavity Wall Insulation PIR Board T&G 1200 x 450mm

    £18.36 - £22.40 per sheet (Ex VAT)
    £22.03 - £26.88 per sheet (Inc VAT)
    XtroLiner is an innovative partial fill wall cavity insulation system incorporating robust facings and preformed corners. The XO/CW jointing offers a practical on-site solution that results in a more robust continuous layer of insulation, minimising the...
  • Unilin XtroLiner Framing Board Insulation PIR Board 2400 x 1200mm

    Unilin XtroLiner Framing Board Insulation PIR Board 2400 x 1200mm

    £49.22 - £108.62 per sheet (Ex VAT)
    £59.06 - £130.34 per sheet (Inc VAT)
    XtroLiner XO/FB is a PIR foamboard which has been specifically developed for use as a thermally efficient insulation board in building constructions. XO/FB is designed for use in a wide range of construction including steel or timber frame applications...
  • Unilin XtroLiner Pitched Roof Insulation PIR Board 2400 x 1200mm

    Unilin XtroLiner Pitched Roof Insulation PIR Board 2400 x 1200mm

    £49.22 - £108.62 per sheet (Ex VAT)
    £59.06 - £130.34 per sheet (Inc VAT)
    A pitched roof is the most efficient U-value with minimal intrusion into valuable living space. Xtraliner Xtroliner Pitched Roof Insulation PIR Board provides high resistance to heat loss with minimal intrusion into valuable living space. Using Xtrolley...
  • Unilin XtroLiner Soffit Plus Insulation PIR Board 2400 x 1200mm

    Unilin XtroLiner Soffit Plus Insulation PIR Board 2400 x 1200mm

    £217.18 - £259.57 per sheet (Ex VAT)
    £260.62 - £311.48 per sheet (Inc VAT)
    Unilin / Xtratherm XtroLiner Soffit Plus is an effective thermal and fire protection solution, in structural ceiling applications. The high performance modified PIR insulation board, with low emissivity textured aluminium foil facings, is adhesively...
  • Unilin XtroLiner Underfloor Insulation PIR Board 2400 x 1200mm

    Unilin XtroLiner Underfloor Insulation PIR Board 2400 x 1200mm

    £49.22 - £108.62 per sheet (Ex VAT)
    £59.06 - £130.34 per sheet (Inc VAT)
    XtroLiner XO/UF underfloor insulation board is the perfect solution for insulating floors. It has a thermal conductivity of 0.021 W/mK, making it excellent for improving U-Values and R-Values. This product has also been Euroclass C Certified for Fire...
  • Xtratherm ECO CavityTherm External Corner Insulation PIR Board

    Xtratherm ECO CavityTherm External Corner Insulation PIR Board

    £27.59 - £34.23 per sheet (Ex VAT)
    £33.11 - £41.08 per sheet (Inc VAT)
    An engineered system providing added resilience against increases in wind-driven rain resulting from climate change. CavityTherm 360 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...

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

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