PIR Insulation Board

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

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£62.49 - £115.47 per sheet (Ex VAT)

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£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...

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£62.49 - £115.47 per sheet (Ex VAT)

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£74.99 - £138.56 per sheet (Inc VAT)
Unilin Safe-R Underfloor Insulation PIR Board 2400 x 1200mm

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£38.01 - £112.24 per sheet (Ex VAT)

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£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...

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£38.01 - £112.24 per sheet (Ex VAT)

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£45.61 - £134.69 per sheet (Inc VAT)
Unilin SafeR Thermal Insulation PIR Board DD 2400 x 1200mm

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£70.74 - £128.21 per sheet (Ex VAT)

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£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...

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£70.74 - £128.21 per sheet (Ex VAT)

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£84.89 - £153.85 per sheet (Inc VAT)
Unilin Thin-R Cavity Wall Corner T&G Insulation PIR Board 1200 x 450mm

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£7.97 - £13.71 per sheet (Ex VAT)

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£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...

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£7.97 - £13.71 per sheet (Ex VAT)

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£9.56 - £16.45 per sheet (Inc VAT)
Unilin Thin-R Cavity Wall Insulation PIR Board 1200 x 450mm

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£7.52 - £12.94 per sheet (Ex VAT)

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£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...

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£7.52 - £12.94 per sheet (Ex VAT)

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£9.02 - £15.53 per sheet (Inc VAT)
Unilin Thin-R Cavity Wall Plus Corner Insulation PIR Board T&G 1200 x 450mm

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£10.48 - £19.22 per sheet (Ex VAT)

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£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...

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£10.48 - £19.22 per sheet (Ex VAT)

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£12.58 - £23.06 per sheet (Inc VAT)
Unilin Thin-R Cavity Wall Plus Insulation PIR Board T&G 1200 x 450mm

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£10.48 - £19.22 per sheet (Ex VAT)

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£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...

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£10.48 - £19.22 per sheet (Ex VAT)

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£12.58 - £23.06 per sheet (Inc VAT)
Unilin Thin-R Cavity Wall T&G Insulation PIR Board 1200 x 450mm

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£8.86 - £13.88 per sheet (Ex VAT)

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£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...

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£8.86 - £13.88 per sheet (Ex VAT)

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£10.63 - £16.66 per sheet (Inc VAT)
Unilin Thin-R Flat Roof ALU Single Ply Insulation PIR Board 2400 x 1200mm

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£38.76 - £144.92 per sheet (Ex VAT)

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£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...

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£38.76 - £144.92 per sheet (Ex VAT)

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£46.51 - £173.90 per sheet (Inc VAT)
Unilin Thin-R Flat Roof BGM Insulation PIR Board 1200 x 600mm

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£9.90 - £37.00 per sheet (Ex VAT)

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£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...

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£9.90 - £37.00 per sheet (Ex VAT)

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£11.88 - £44.40 per sheet (Inc VAT)
Unilin Thin-R Flat Roof MG Single Ply Insulation PIR Board 1200 x 600mm

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£10.45 - £39.07 per sheet (Ex VAT)

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£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...

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£10.45 - £39.07 per sheet (Ex VAT)

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£12.54 - £46.88 per sheet (Inc VAT)
Unilin Thin-R Plus Hyfloor Insulation PIR Board T&G 2400 x 1200mm

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£57.10 - £106.10 per sheet (Ex VAT)

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£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...

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£57.10 - £106.10 per sheet (Ex VAT)

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£68.52 - £127.32 per sheet (Inc VAT)
Unilin Thin-R Polyiso Strips Insulation PIR Board 25mm

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£20.55 - £126.69 per sheet (Ex VAT)

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£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...

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£20.55 - £126.69 per sheet (Ex VAT)

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£24.66 - £152.03 per sheet (Inc VAT)
Unilin XT Thermal Liner MF Insulation PIR Board 2400 x 1200mm

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£45.90 - £68.52 per sheet (Ex VAT)

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£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...

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£45.90 - £68.52 per sheet (Ex VAT)

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£55.08 - £82.22 per sheet (Inc VAT)
Unilin XtroLiner Cavity Wall Insulation PIR Board 1200 x 450mm

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£18.38 - £22.40 per sheet (Ex VAT)

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£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,...

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£18.38 - £22.40 per sheet (Ex VAT)

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£22.06 - £26.88 per sheet (Inc VAT)
Unilin XtroLiner Cavity Wall Insulation PIR Board T&G 1200 x 450mm

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£18.36 - £22.40 per sheet (Ex VAT)

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£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...

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£18.36 - £22.40 per sheet (Ex VAT)

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£22.03 - £26.88 per sheet (Inc VAT)
Unilin XtroLiner Framing Board Insulation PIR Board 2400 x 1200mm

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£49.22 - £108.62 per sheet (Ex VAT)

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£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...

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£49.22 - £108.62 per sheet (Ex VAT)

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£59.06 - £130.34 per sheet (Inc VAT)
Unilin XtroLiner Pitched Roof Insulation PIR Board 2400 x 1200mm

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£49.22 - £108.62 per sheet (Ex VAT)

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£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...

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£49.22 - £108.62 per sheet (Ex VAT)

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£59.06 - £130.34 per sheet (Inc VAT)
Unilin XtroLiner Soffit Plus Insulation PIR Board 2400 x 1200mm

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£217.18 - £259.57 per sheet (Ex VAT)

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£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...

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£217.18 - £259.57 per sheet (Ex VAT)

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£260.62 - £311.48 per sheet (Inc VAT)
Unilin XtroLiner Underfloor Insulation PIR Board 2400 x 1200mm

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£49.22 - £108.62 per sheet (Ex VAT)

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£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...

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£49.22 - £108.62 per sheet (Ex VAT)

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£59.06 - £130.34 per sheet (Inc VAT)
Xtratherm ECO CavityTherm External Corner Insulation PIR Board

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£27.59 - £34.23 per sheet (Ex VAT)

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£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...

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£27.59 - £34.23 per sheet (Ex VAT)

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£33.11 - £41.08 per sheet (Inc VAT)

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What are PIR Boards?

PIR stands for Polyisocyanurate and it is a rigid form of thermal insulation that is manufactured from plastic to create a foam.

PIR was introduced to the market in the 1960s, as an advanced replacement to PUR (Polyurethane) Boards.

PIR Insulation is suitable for use in a wide range of applications:

Walls – Ecoliner products are suitable for insulating and drylining internal walls, whilst Eco-Versal offers timber frame walls thermal insulation with both faces including aluminium foil. As the name suggests, the Eco Cavity is used in Cavity/Masonry Walls and are designed to work with the typical dimensions of brick and block.
Flooring – Suitable for most types of flooring including timber, solid and concrete, as well as suspended flooring, it is crucial to ensure that floors are fully insulated to tackle the problem of heat rising.
Lofts – Loft spaces are a void that is the most common cause for heat loss, so choosing a good form of insulation such as PUR or PIR will help to save you money, whilst ensuring that your home is energy efficient.
Eco-Versal is a popular choice of PIR insulation because it is effective at insulating a wide range of areas of your home including pitched roofing, walls, loft ceiling, and floors.

Frequently Asked Questions

What is pir insulation?

Polyisocyanurate (PIR) is one of the most efficient insulation materials used in construction. Pir insulation boards are typically available in the following sizes: 25mm, 75mm, 100mm, 120mm and 150mm.

What does pir stand for in pir insulation?

Polyisocyanurate, also referred to as PIR, is a thermoset plastic typically produced as a foam and used as rigid thermal insulation.

Is pir insulation flammable?

Whilst we urge you to refer to the manufacturer’s fire testing certifications, commercially available PIR insulation is not typically flammable.

Is pir insulation waterproof?

While PIR insulation boards are generally resistant to moisture, they are not fully waterproof.

What is the difference between pir and phenolic insulation?

As with the PIR/PUR boards above, phenolic insulation boards also have a closed cell structure. Phenolic board has a slightly higher r-value (higher is better, unlike u-values) and a slightly thinner profile than PIR/PUR boards due to the manufacturing process.

How to guides

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.

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