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![Unilin Thin-R Pitched Roof Insulation PIR Board 2400 x 1200mm]( "Unilin Thin-R Pitched Roof Insulation PIR Board 2400 x 1200mm")
Unilin Thin-R Pitched Roof Insulation PIR Board 2400 x 1200mm
£18.70 - £102.35 per sheet (Ex VAT)£22.44 - £122.82 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... -
![Unilin XT Thermal Liner DD Insulation PIR Board 2400 x 1200mm]( "Unilin XT Thermal Liner DD Insulation PIR Board 2400 x 1200mm")
Unilin XT Thermal Liner DD Insulation PIR Board 2400 x 1200mm
£45.13 - £68.11 per sheet (Ex VAT)£54.16 - £81.73 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... -
![Unilin CavityTherm 100-150 Vent Panel 375 x 265 x 45mm]( "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")
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")
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")
Unilin CavityTherm Full Fill Insulation PIR Board 1200 x 450mm
£28.32 - £39.83 per sheet (Ex VAT)£33.98 - £47.80 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")
Unilin CavityTherm Full Fill Int Corner Insulation PIR Board 1200 x 450mm
£30.15 - £39.83 per sheet (Ex VAT)£36.18 - £47.80 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")
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")
Unilin CavityTherm Full Fill Top Insulation PIR Panel 1200 x 225mm
£30.15 - £39.85 per sheet (Ex VAT)£36.18 - £47.82 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")
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")
Unilin CavityTherm150 Meter Box Insulation PIR Panel 1200 x 600mm
£30.22 - £38.59 per sheet (Ex VAT)£36.26 - £46.31 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")
Unilin ECO Cavity Wall Rebate Edge Insulation PIR Board 1200 x 450mm
£27.75 - £30.52 per sheet (Ex VAT)£33.30 - £36.62 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")
Unilin ECO CavityTherm Full Fill Insulation PIR Board 1200 x 450mm
£29.80 - £36.97 per sheet (Ex VAT)£35.76 - £44.36 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")
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]( "Unilin ECO Multi Application Insulation PIR Board 2400 x 1200mm")
Unilin ECO Multi Application Insulation PIR Board 2400 x 1200mm
£133.41 - £200.05 per sheet (Ex VAT)£160.09 - £240.06 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")
Unilin Roof Thermal Ply Insulation PIR Board 2400 x 1200mm
£78.70 - £162.40 per sheet (Ex VAT)£94.44 - £194.88 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")
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")
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")
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")
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")
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... -
![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")
Unilin Thin-R Cavity Wall Corner T&G Insulation PIR Board 1200 x 450mm
£8.02 - £13.79 per sheet (Ex VAT)£9.62 - £16.55 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")
Unilin Thin-R Cavity Wall Insulation PIR Board 1200 x 450mm
£7.57 - £13.02 per sheet (Ex VAT)£9.08 - £15.62 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")
Unilin Thin-R Cavity Wall Plus Corner Insulation PIR Board T&G 1200 x 450mm
£11.31 - £20.75 per sheet (Ex VAT)£13.57 - £24.90 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...
PIR Insulation Board
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.
Insulation for every application
Unsure how to keep your keep your heating costs down? Read this article on types of insulation and more.
Celotex Insulation
Saint Gobain Celotex Insulation guide - what is Celotex and how to use it.
How to insulate a garage
A step-by-step guide on how to insulate your garage. Find out more.
How to insulate a shed
A step-by-step guide on how to insulate your shed. Find out more.