PIR Insulation Board

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Celotex XR4000 PIR Insulation Board 1200 x 2400mm

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£60.22 - £125.23 per sheet (Ex VAT)

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£72.26 - £150.28 per sheet (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...

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£60.22 - £125.23 per sheet (Ex VAT)

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£72.26 - £150.28 per sheet (Inc VAT)
Celotex CW4000 PIR Cavity Wall Insulation 1200 x 450mm

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£6.09 - £14.04 per sheet (Ex VAT)

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£7.31 - £16.85 per sheet (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...

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£6.09 - £14.04 per sheet (Ex VAT)

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£7.31 - £16.85 per sheet (Inc VAT)
Unilin Thin-R Pitched Roof Insulation PIR Board 2400 x 1200mm

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£17.97 - £98.39 per sheet (Ex VAT)

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£21.56 - £118.07 per sheet (Inc VAT)

Unilin / Xtratherm XT Thermal Liner MF Insulation PIR Board is a composite insulated panel of Unilin / Xtratherm PIR insulation core with a composite foil facing bonded to 12.5mm tapered edge plasterboard for internal walls, sloped roofs and ceilings...

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£17.97 - £98.39 per sheet (Ex VAT)

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£21.56 - £118.07 per sheet (Inc VAT)
Celotex PL4000 Thermal PIR Insulation Board 1200 x 2400mm

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£56.51 - £73.31 per sheet (Ex VAT)

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£67.81 - £87.97 per sheet (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...

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£56.51 - £73.31 per sheet (Ex VAT)

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£67.81 - £87.97 per sheet (Inc VAT)
Unilin XT Thermal Liner DD Insulation PIR Board 2400 x 1200mm

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£43.38 - £65.48 per sheet (Ex VAT)

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£52.06 - £78.58 per sheet (Inc VAT)

Unilin / Xtratherm XT Thermal Liner is specifically designed to create a thermal break in the building envelope and provide a maximum level of insulation with minimal acoustic impact. It is perfectly suited to modern constructions projects where high...

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£43.38 - £65.48 per sheet (Ex VAT)

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£52.06 - £78.58 per sheet (Inc VAT)
Unilin Roof Thermal Ply Insulation PIR Board 2400 x 1200mm

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£92.62 - £191.06 per sheet (Ex VAT)

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£111.14 - £229.27 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...

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£92.62 - £191.06 per sheet (Ex VAT)

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£111.14 - £229.27 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 ECO Cavity Wall Rebate Edge Insulation PIR Board 1200 x 450mm

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£25.70 - £28.26 per sheet (Ex VAT)

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£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.

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£25.70 - £28.26 per sheet (Ex VAT)

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£30.84 - £33.91 per sheet (Inc VAT)
Celotex TB4030 PIR Insulation Board

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£18.17 - £29.38 (Ex VAT)

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£21.80 - £35.26 (Inc VAT)

Celotex TB4000 is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing. Available in thicknesses from 20mm to 40mm, it can be considered for floor, wall and roof...

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£18.17 - £29.38 (Ex VAT)

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£21.80 - £35.26 (Inc VAT)
Celotex GA4000 PIR Insulation Board 1200 x 2400mm

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£27.29 - £58.50 per sheet (Ex VAT)

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£32.75 - £70.20 per sheet (Inc VAT)

Celotex GA4000 is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing. Available in thicknesses from 50mm to 100mm, it can be considered for roof, wall and floor...

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£27.29 - £58.50 per sheet (Ex VAT)

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£32.75 - £70.20 per sheet (Inc VAT)
Celotex Thermaclass Cavity Wall 21 Insulation 1190 x 450mm

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£15.80 - £24.57 per sheet (Ex VAT)

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£18.96 - £29.48 per sheet (Inc VAT)

Thermaclass Cavity Wall 21 is an easy to install, polyisocyanurate (PIR) insulation board for full fill cavity wall applications, with excellent thermal performance (0.021 W/m.K). Featuring a low emissivity foil facing, it can be installed with up to a...

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£15.80 - £24.57 per sheet (Ex VAT)

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£18.96 - £29.48 per sheet (Inc VAT)
Unilin Thin-R Cavity Wall Corner T&G Insulation PIR Board 1200 x 450mm

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£7.71 - £13.27 per sheet (Ex VAT)

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£9.25 - £15.92 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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£7.71 - £13.27 per sheet (Ex VAT)

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£9.25 - £15.92 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 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 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 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 MG Single Ply Insulation PIR Board 1200 x 600mm

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£10.11 - £37.81 per sheet (Ex VAT)

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£12.13 - £45.37 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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£10.11 - £37.81 per sheet (Ex VAT)

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£12.13 - £45.37 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 CavityTherm Full Fill Insulation PIR Board 1200 x 450mm

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£26.23 - £36.88 per sheet (Ex VAT)

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£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...

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£26.23 - £36.88 per sheet (Ex VAT)

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£31.48 - £44.26 per sheet (Inc VAT)
Unilin CavityTherm Full Fill Ext Corner Insulation PIR Board 1200 x 450mm

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£27.91 - £36.88 per sheet (Ex VAT)

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£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.

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£27.91 - £36.88 per sheet (Ex VAT)

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£33.49 - £44.26 per sheet (Inc VAT)
Unilin CavityTherm Full Fill Int Corner Insulation PIR Board 1200 x 450mm

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£27.91 - £36.88 per sheet (Ex VAT)

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£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.

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£27.91 - £36.88 per sheet (Ex VAT)

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£33.49 - £44.26 per sheet (Inc VAT)
Unilin CavityTherm Full Fill Riser Insulation PIR Panel 1200 x 225mm

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£27.91 - £36.90 per sheet (Ex VAT)

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£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...

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£27.91 - £36.90 per sheet (Ex VAT)

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£33.49 - £44.28 per sheet (Inc VAT)
Unilin CavityTherm Full Fill Top Insulation PIR Panel 1200 x 225mm

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£27.91 - £36.90 per sheet (Ex VAT)

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£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.

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£27.91 - £36.90 per sheet (Ex VAT)

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£33.49 - £44.28 per sheet (Inc VAT)
Unilin CavityTherm Full Fill Cavity Tray Insulation PIR Board 1200 x 350mm

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£18.43 per sheet (Inc VAT)

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£15.36 per sheet (Ex VAT)

The Cavitytherm Full Fill Channel is an insulated channel to allow for insulation continuity around stepped cavity trays at gable junctions.

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£18.43 per sheet (Inc VAT)

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£15.36 per sheet (Ex VAT)

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.

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