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Xtratherm

Xtratherm's brand is deeply rooted in the Lambda value. The Lambda value is the inherent insulation value of any material. The lower that lambda value - the greater the insulation value per mm from that product. Xtratherm delivers twice the performance of ordinary insulation - or the same performance using half the thickness of polyiso (PIR). Xtratherm is one of the well-known brand in the UK and Ireland. Choosing the right insulation for your project would make your building comfortable, energy efficient and environmentally sustainable. Xtratherm manufactures not only Polyiso (PIR), but also Phenolic and EPS insulating materials to the highest quality and performance standards using the latest technology and a strict Quality Control process.

Types of Products
  • Multi-purpose Boards,
  • Wall Insulation - Cavity Wall Boards, Framing Boards, Dry-lining Boards, Rainscreen Boards
  • Floor Insulation - Floor Boards, Soffit Boards
  • Roof Insulation - Flat Roof Boards, Pitched Roof Boards
Multi-purpose Boards
  • Xtratherm Thin-r is a foil faced Polyisocyanurate (PIR) insulation board formed by a blowing process which generates rigid foam composed of fine cells filled with Pentane blowing agent trapped within the foam. Pentane has very good insulating properties and gives Thin-r superb insulating capability. Long term performance is ensured by the foil facings which are gas tight. Used for insulating walls, floors and roofs.
  • Xtratherm Safe-R Phenolic Board is a superior performance rigid insulation with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R is faced with low emissivity aluminium facings both sides, and has a thermal conductivity as low as 0.021W/mK. Used for insulating partial fill cavity walls, pitched roofs soffits, solid and suuspended floors and as Rainscreen insulation.
Cavity Wall Boards
  • Xtratherm Thin-R XT/CW Partial Fill Cavity Wall Insulation is the best solution when additional thermal insulation is needed in external masonry walls, without a substantial increase in the width of the cavity. Xtratherm Thin-R boards achieve high standards of insulation whilst maintaining a residual cavity to prevent moisture penetration, without a substantial increase in the width of the cavity and of the overall wall thickness.
  • Xtratherm Cavity Therm wall insulation board is a high performance composite board of enhanced PIR core with a lambda value of 0.021W/mK. The boards have gas tight facings with one face bonded to a profiled HIPS skin during manufacture to provide a drainage plane. Its unique engineered profiled facing directs any moisture might penetrate the external wall down the protective facing and back onto the external leaf, giving added protection from wind  driven rain.
Dry-Lining Boards
  • Xtratherm XT/TL Thermal Liner Dot and Dab Insulated Plasterboard is a high performance rigid insulation board made from Xtratherm PIR core faced with composite kraft paper bonded to 9.5mm plasterboard or to 12.5mm plasterboard, specially designed for internal walls dry lining and insulation, due to its closed cell composition and tight facings that provide not only thermal insulation but also high level of moisture resistance and a vapour control layer. The board also provides a level of fire resistance due to the continuous adhesive ribbons, especially around openings, such as those around windows and doors. 
  • Xtratherm Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 25mm Xtratherm Polyiso (PIR) core with foil faces bonded to 9.5mm tapered edge plasterboard or to 12.5mm tapered edge plasterboard for mechanically fixing to internal walls. XT/TL-MF is designed to provide high levels of thermal insulation and dry lining in one operation for suitable masonry walls, sloped rafters and ceilings in new build and refurbishment situations. XT/TL-MF is only suitable for mechanical fixed applications
Floor Insulation Boards
  • Xtratherm Thin-R Hyfloor XT/HYF is a high performance floor Insulation board with superior thickness to performance ratio allowing the lower targets required under the new Building Regulations to be achieved with minimum thicknesses. It is a high performance foil faced Polyiso (PIR) insulation with a certified thermal conductivity as low as 0.022W/mK. Manufactured to strict EN 13165 standards, the closed cell structure and gas tight facings provides excellent thermal performance and moisture resistance. It has an engineered jointing to provide improved continuity and unparalleled thermal bridging performance.

Roof Insulation Boards
  • Xtratherm Plydeck is a composite insulated panel of Xtratherm Polyiso PIR core with a composite gas-tight foil face to the underside, bonded to 9mm OSB board. Plydeck is designed to provide high levels of thermal insulation and decking in one operation for new and refurbishment flat roof applications. Bedding the panel onto a bed of mastic creates a continuous vapour control layer. Plydeck does not readily absorb water, making it suitable for use in damp environment.
  • XtroLiner XO/PR board has a core of modified polyiso (PIR) bonded to low emissivity textured aluminium foil facings. It offers excellent insulation performance with thermal conductivity of 0.021 W/mK and a Class ‘O’ fire rating. Using Xtratherm XO/PR on sloped roof areas can provide the most efficient U-values with minimal intrusion into valuable living space. Insulating above and between the roof timbers ensures that the structure is kept at, or near the internal environmental conditions, reducing thermal stress and condensation risk. Placing XtroLiner XO/PR between and/or below the rafter creates a Ventilated Roof.
  • Xtratherm FR-BGM is a Polyiso (PIR) insulation board that is faced with a fleece finished bitumen orglass facers and is suitable for use below partially bonded bitumen based built up roofing systems. FR-BGM can also be used in mechanically fastened or loose laid ballasted bituminous roofing systems. Xtratherm FR/BGM is suitable for use on roof decks that are subject to limited maintenance foot traffic. It is a BBA certified high performance flat and tapered roof insulation board that provides a guaranteed quality solution to flat roof specification.
  • Xtratherm FR/MG is a high performance Polyiso (PIR) 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. It is suitable for use on roof decks that are subject to maintenance traffic; walk-ways should be provided on roofs requiring regular pedestrian access, and below most single ply fully adhered and mechanically fixed roof membrane systems or loose laid ballasted roofing systems.
tech. support: 0371 222 1055
15mm Xtratherm PIR Rigid Insulation Board - 1200mm x 1200mm
Guide Price
Brand: Xtratherm Model and Size: 1200mm x 1200mm - 1.44m2
Delivery Time: 1 - 5 working days
15mm Xtratherm Thin-r is a foil faced Polyisocyanurate (PIR) insulation board formed by a blowing process which generates rigid foam composed of fine cells filled with Pentane blowing agent trapped within the foam. Pentane has very good insulating properties and gives Thin-r superb insulating capabi..
Guide Price: £11.50
£13.80 inc VAT
24.5mm Xtratherm XT/TL Thermal Liner Dot and Dab (15mm PIR Insulation bonded to 9.5mm Plasterboard)
Guide Price
Brand: Xtratherm Model and Size: 1200x2400 - 2.88m2
Delivery Time: 1 - 5 working days
24.5mm Xtratherm XT/TL Thermal Liner Dot and Dab Insulated Plasterboard is a high performance rigid insulation board made from 15mm Xtratherm PIR core faced with composite kraft paper bonded to tapered edge 9.5mm plasterboard, specially designed for internal walls dry lining and insulation..
Guide Price: £57.71
£69.25 inc VAT
50mm Xtratherm Safe-R SR/CW Phenolic Partial Fill Cavity Insulation Board (pack of 6)
Guide Price
Brand: Xtratherm Model and Size: 1200x450mm - 3.24m2
Delivery Time: 2 - 3 days
50mm Xtratherm Safe-R SR/CW Phenolic foam board is a superior performance rigid partial fill cavity insulation board with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R SR/CW is faced with low emissivity aluminium facings bot..
56mm Xtratherm FR/TP Thermal Ply Flat Roof Board - 50mm PIR + 6mm Plywood Board
Guide Price
Brand: Xtratherm Model and Size: 2400x1200 - 2.88m2
Delivery Time: 2 - 5 working days
56mm Xtratherm FR/TP Ply is a composite insulated panel of 50mm Xtratherm Polyisocyanurate core with a composite foil face, bonded to 6mm WBP grade plywood board. Xtratherm FR/TP Ply is designed to provide high levels of thermal insulation and decking in one operation for new and refurbish..
27.5mm Xtratherm XT/TL Thermal Liner Dot and Dab (15mm PIR Insulation bonded to 12.5mm Plasterboard)
Guide Price
Brand: Xtratherm Model and Size: 1200x2400 - 2.88m2
Delivery Time: 1 - 5 working days
27.5mm Xtratherm XT/TL Thermal Liner Dot and Dab Insulated Plasterboard is a high performance rigid insulation board made from 15mm Xtratherm PIR core faced with composite kraft paper bonded to 12.5mm plasterboard, specially designed for internal walls dry lining and insulation, due to its..
Guide Price: £57.71
£69.25 inc VAT
27.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (15mm PIR Insulation bonded to 12.5mm Plasterboard)
Guide Price
Brand: Xtratherm Model and Size: 1200x2400 (2.88m2)
Delivery Time: 1 - 5 working days
27.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 15mm Xtratherm Polyiso (PIR) core with foil faces bonded to 12.5mm tapered edge plasterboard for mechanically fixing to internal walls. XT/TL-MF is designed to provide high levels of thermal insulation and dry..
Guide Price: £50.48
£60.58 inc VAT
56mm Xtratherm Safe-R SR/STP Phenolic Soffit Plus Board - (50mm Phenolic + 6mm Building Panel)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 2.88m2
Delivery Time: 2 - 3 days
56mm Xtratherm Safe-R SR/CW Phenolic Soffit Plus Board (50mm Phenolic + 6mm Building Panel) is a foam board is a superior performance ceiling insulation board with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R SR/STP phenoli..
25mm Xtratherm Safe-R SR/UF Phenolic Underfloor Insulation Board (pack of 12)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 34.56m2
Delivery Time: 2 - 3 days
25mm Xtratherm Safe-R SR/UF Phenolic foam is a superior performance rigid underfloor insulation with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R SR is faced with low emissivity aluminium facings both sides, and has a ..
37.5mm Xtratherm Safe-R Thermal Liner SR/TB (25mm Phenolic Core + 12.5mm Plasterboard) - Dot & Dab (pack of 12)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200 - 34.56m2
Delivery Time: 2 - 3 days
37.5mm Xtratherm Safe-R Thermal Liner SR/TB is a composite insulated panel of Xtratherm 25mm Phenolic core with a composite tissue facing bonded to a 12.5mm tapered edge plasterboard for internal applications,fixed with dot & dab adhesive bonding. Xtratherm Safe-R Thermal Liner SR/TB is designed..
Guide Price: £647.44
£776.93 inc VAT
24.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (15mm PIR Insulation bonded to 9.5mm Plasterboard)
Guide Price
Brand: Xtratherm Model and Size: 1200x2400 (2.88m2)
Delivery Time: 1 - 5 working days
24.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 15mm Xtratherm Polyiso (PIR) core with foil faces bonded to 9.5mm tapered edge plasterboard for mechanically fixing to internal walls. XT/TL-MF is designed to provide high levels of thermal insulation and dry ..
Guide Price: £50.48
£60.58 inc VAT
25mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board (pack of 12)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 34.56m2
Delivery Time: 2 - 3 days
25mm Xtratherm Thin-R FR/ALU Flat Roof PIR Insulation Board is a flat roof insulation with enhanced vapour resistant performance. Thin-R FR/ALU board is faced with low emissivity aluminium facings both sides. Rot proof and will remain effective for the life span of the building. Suitable for us..
50mm Xtratherm Safe-R SR/FB Phenolic Insulation Framing Board (pack of 6)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 17.28m2
Delivery Time: 2 - 3 days
50mm Xtratherm Safe-R SR/FB Phenolic foam is a superior performance rigid insulation framing board with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R SR is faced with low emissivity aluminium facings both sides, and has..
37.5mm Xtratherm Safe-R Thermal Liner SR/TB-MF (25mm Phenolic Core + 12.5mm Plasterboard) -  Mechanical Fixing (pack of 12)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200 - 34.56m2
Delivery Time: 2 - 3 days
37.5mm Xtratherm Safe-R Thermal Liner SR/TB-MF is a composite insulated panel of Xtratherm 25mm Phenolic core with a composite tissue facing bonded to a 12.5mm tapered edge plasterboard for internal applications, mechanical fixed. Xtratherm Safe-R Thermal Liner SR/TB-MF is designed to provide high l..
Guide Price: £665.07
£798.08 inc VAT
25mm Xtratherm XtroLiner XO/PR Pitched Roof PIR Insulation Board Fire Rated - Pack of 12 25mm Xtratherm XtroLiner XO/PR Pitched Roof PIR Insulation Board Fire Rated - Pack of 12
Guide Price
Brand: Xtratherm Model and Size: 1200x2400mm - 34.56m2
Delivery Time: 1 - 5 working days
25mm XtroLiner XO/PR board has a core of modified polyisocyanurate (PIR) bonded to low emissivity textured aluminium foil facings. It offers excellent insulation performance with thermal conductivity of 0.021 W/mK and a Class ‘O’ fire rating. XtroLiner XO/PR is CFC & HCFC free and is manufacture..
50mm Xtratherm Safe-R SR/ST Phenolic Insulation Soffit Board (pack of 6)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 17.28m2
Delivery Time: 2 - 3 days
50mm Xtratherm Safe-R SR/ST Phenolic foam is a superior performance rigid insulation soffit board with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R SR/ST is faced with low emissivity aluminium facings both sides, and has a ..
25mm Flat Roof Insulation Board Xtratherm FR-BGM (pack of 18)
Guide Price
Brand: Xtratherm Model and Size: 1200x600mm - 12.96m2
Delivery Time: 3 - 5 days
25mm Xtratherm FR-BGM is a PIR insulation board that is faced with a fleece finished bitumen/glass facers and is suitable for use below partially bonded bitumen based built up roofing systems. FR-BGM is suitable to apply torch on felt directly on the insulation. FR-BGM can also be used in mecha..
Guide Price: £146.76
£176.11 inc VAT
75mm Xtratherm Thin-R Hyfloor XT/HYF Under Floor PIR Insulation Board - Pack of 4
Guide Price
Brand: Xtratherm Model and Size: 1200x2400mm - 11.52m2
Delivery Time: 1 - 5 working days
75mm Xtratherm Thin-R Hyfloor XT/HYF is a high performance floor Insulation board with superior thickness to performance ratio allowing the lower targets required under the new Building Regulations to be achieved with minimum thicknesses. Xtratherm Thin-R Hyfloor XT/HYF is a high performance fo..
40mm Xtratherm Safe-R SR/RS Phenolic Insulation Rainscreen Cladding Board (pack of 7)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm - 20.16m2
Delivery Time: 2 - 3 days
40mm Xtratherm Safe-R SR/RS Phenolic foam is a superior performance rigid insulation rainscreen cladding board with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R SR/RS is faced with low emissivity aluminium facings both side..
35mm Xtratherm Thin-R XT/CW Partial Fill Cavity Insulation (pack of 9)
Guide Price
Brand: Xtratherm Model and Size: 1200x450mm - 4.86m2
Delivery Time: 2 - 4 days
Xtratherm ThinR XT/CW Partial Fill Cavity Wall Insulation is the best solution when designers or regulations demand additional thermal insulation in external masonry walls, without a substantial increase in the width of the cavity. Xtratherm Thin-R boards achieve high standards of insulation wh..
Guide Price: £44.31
£53.17 inc VAT
75mm Thin-R CT/PIR Cavity Therm Full Fill Insulation Xtratherm (pack of 4)
Guide Price
Brand: Xtratherm Model and Size: CT/PIR 1200x450 - 2.16m2
Delivery Time: 2 - 3 days
75mm Xtratherm CavityTherm wall insulation board is a high performance composite board of enhanced PIR core with a lambda value of 0.021W/mK. The boards have gas tight facings with one face bonded to a profiled HIPS skin during manufacture to provide a drainage plane. CavityTherms unique engineered ..
Guide Price: £76.27
£91.52 inc VAT
59mm Plydeck Xtratherm (PIR with OSB Board) - 50mm PIR + 9mm OSB Board
Guide Price
Brand: Xtratherm Model and Size: 2400x1200 - 2.88m2
Delivery Time: 1 - 5 working days
Xtratherm Plydeck is a composite insulated panel of 50mm Xtratherm Polyisocyanurate core with a composite foil face, bonded to 9mm OSB board. The Xtratherm Plydeck provides a high level of thermal insulation and decking in one application.APPLICATIONPlydeck is designed to provide high levels of ther..
Guide Price: £77.01
£92.41 inc VAT
50mm Xtratherm Flat Roof Board FR-MG (pack of 10)
Guide Price
Brand: Xtratherm Model and Size: 1200x600mm - 7.2m2
Delivery Time: 1 - 2 days
Xtratherm FR-MG is a mineral coated glass faced board. Xtratherm XT/FR MG boards should be laid over the vapour control layer in a break bonded pattern. The long edges of the boards should be laid at right angles to the direction of the substrate and all edges must be fully supported by the deck. Th..
Guide Price: £114.35
£137.22 inc VAT
25mm Xtratherm Safe-R SR/PR Phenolic Insulation Board (pack of 12)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200 - 34.56m2
Delivery Time: 2 - 3 days
25mm Xtratherm Safe-R SR/PR Phenolic foam is a superior performance rigid insulation with enhanced fire performance, consisting of a Class O phenolic foam core with negligible smoke obscuration. Safe-R is faced with low emissivity aluminium facings both sides, and has a thermal conductivit..
Guide Price: £362.16
£434.59 inc VAT
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