Largely manufactured from recycled glass (e.g. windscreens) and mineral base materials such as sand and without the use of binding agents. The ingredients are melted into molten glass, which is cooled and crushed into a fine powder. The powdered glass is poured into molds and heated (below the melting point) in a "sintering" process that causes the particles to adhere to one another. Next, a small amount of finely ground carbon-black is added and the material is heated in a "cellulation" process. Here, the carbon reacts with oxygen, creating carbon dioxide, which creates the insulating bubbles in the (material). CO2 accounts for more than 99% of the gas in the cellular spaces.
Cellulose insulation is a material made from recycled newspaper. The paper is shredded and inorganic salts, such as boric acid, are added for resistance to fire, mould, insects and vermin. The insulation is installed either blown or damp-sprayed depending on application.
Wood fibre
The success of wood fibre insulation derives from an attractive environmental profile combined with a whole bag of functions including rigid insulation, sheathing and sarking for timber frames, roofs and flooring as well as flexible insulation for studs and rafters.
Wood of course is renewable, it sequesters carbon during its growth and product production is relatively free from pollution. The insulation value of wood fibre boards is not as dimensionally efficient as some of the orthodox petro-chemical materials - but it's no slouch either - typically coming in with a 'k value' range of between 0.038-0.043 W/mK depending on format.
Hemp
Hemp fibres are produced from hemp straw of the hemp plant. Most hemp is imported, but an increasing amount of home-grown crop is becoming available. Hemp grows up to a height of nearly 4 metres within a period of 100-120 days. Because the plants shade the soil, no chemical protection or toxic additives are required for hemp cultivation. The product is composed of, usually, 85% hemp fibre with the ballance made up of polyester binding and 3-5% soda added for fire proofing.
Straw
Straw is an agricultural by-product, the dry stalks of cereal plants, after the grain and chaff have been removed. Straw makes up about half of the yield of cereal crops such asbarley, oats, rice, rye and wheat.
50-100mm PIR rigid insulation boards are general purpose rigid panels with thicknesses ranging from 50mm to 100mm, designed for application such as walls, floors, flat roofs and pitched roofs, timber framed & steel framed systems, concrete slab ground floors and external cavity wall linings. These boards have also been ranked high amongst some of the best green insulation options for contributing absolutely zero ozone depletion potential (ODP) and for a low global warming potential. Both the blowing agent mix and the solid polyisocyanurate (PIR) used to manufacture this product, amongst many others, are environmentally friendly. Being >100kPa tough, they do not break easily. The entire thickness range offers a low thermal conductivity (lambda value) of 0.022 W/mK, putting boards among the best-performing general purpose insulation materials on the UK market. This group of PIR insulating boards has gained in popularity being widely available in the most favoured stores such as Wickes, B&Q or Screwfix. Many PIR insulation brands, such as Celotex, Xtratherm, Kingspan or Recticel come with a grid marked on, which can act as a guide to help ensure the thermal insulation board is cut in a straight line. For more information on how to cut PIR insulation click here.
PIR INSULATION PRICES
The amount of money you spend on insulation can vary greatly depending on the thickness, so it's important to know what you're getting before you buy. For sure, PIR insulation is a cost-effective building material that will pay for itself over time. General purpose boards are simply a better solution, enabling greater savings and better thermal insulation than standard polystyrene or mineral wool. The price of PIR insulation often depends on two factors. The first is the brand itself. When buying well-known brands, we often pay for the name itself. The second factor is the supplier location ('near me'). When buying PIR from local building merchants such as Wickes, B&Q we pay for 'off the shelf product', we can touch and see it physically, while with an online supplier like us, you can only get better deals without seeing a product. It is because products come to you directly from the manufacturer without involving middlemen.
PIR INSULATION THICKNESS
The typical length and width of a PIR board is 2400mm by 1200mm. Each sheet is 8' x 4' and covers 2.88m2. PIR insulation boards are available in a range of thicknesses such as 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm and 100mm. The most commonly used thicknesses are 50mm, 75mm and 100mm.
PIR RIGID INSULATION BOARDS MANUFACTURERS
Depending of thickness and brand, rigid insulation boards come in multiple name options, including Celotex GA4000, Xtratherm Thin-R, Kingspan TF70, Kingspan TP10, Kingspan TW55, Recticel Eurothane GP, Quinntherm, EcoTherm EcoVersal, IKO Enertherm ALU and Ballytherm PIR. Confusingly, one Kingspan board carries three of the codes "TP10", "TF70" and "TW55" - this is the same board, so the codes can be used interchangeably! In performance terms, the Therma range boards directly compare with the Celotex GA4000 range. Thermapitch is Kingspan roof insulation board and is made for use as pitched roof insulation. This would usually be their range of PIR insulation boards from 50 mm to 150mm which can be friction fit in between rafters. In addition a thinner layer of Kingspan TP10 under the rafters to cover any possible cold bridging through the timbers. These thermal bridging boards would usually be from 25mm to 40mm thick.
100x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF is an engineered floor insulation used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed professionally at the initial ..
100x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
75mm Unilin XT/HYF HYFLOOR PIR Thin-R Plus is a thinnest floor insulation board with an excellent lambda value of 0.021 W/mK and outstanding thermal bridging performance.
Unilin Hyfloor XT/HYF has a superior thickness to performance ratio, allowing the lower targets required under Building Regula..
75mm Unilin XT/HYF HYFLOOR Thin-R Plus Floorboard Premium PIR
For use with underfloor heating, ground supported and suspended floors
Excellent lambda value (Thermal conductivity) of 0.021 W/mK
Unilin XT/HYF Meets U-Values specified in the Building Regulations
Improving the overall U-Value of the floor (XT/HYF HYFLOOR)
100mm Thin-R Plus XT/HYF Unilin Floorboard is a lightweight floor PIR rigid insulation board suitable for use with underfloor heating, ground supported and suspended floors.
Unilin Hyfloor XT/HYF has a superior thickness to performance ratio, allowing the lower targets required under Building Reg..
100mm Unilin XT/HYF HYFLOOR Thin-R Plus Floorboard Premium PIR
For use with underfloor heating, ground supported and suspended floors
Excellent lambda value (Thermal conductivity) of 0.021 W/mK
Unilin XT/HYF Meets U-Values specified in the Building Regulations
Improving the overall U-Value of the floor (XT/HYF HYFLOOR)
110x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF is a 110mm thick engineered floor insulation system used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed professional..
110x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
125mm Unilin XT/HYF Tongue & Groove Floorboard is an enhanced PIR rigid foam insulation between low emissivity gas tight foil facings used for underfloor heating applications.
Unilin Hyfloor XT/HYF has a superior thickness to performance ratio, allowing the lower targets required under Building R..
125mm Unilin XT/HYF HYFLOOR Thin-R Plus Floorboard Premium PIR
For use with underfloor heating, ground supported and suspended floors
Excellent lambda value (Thermal conductivity) of 0.021 W/mK
Unilin XT/HYF Meets U-Values specified in the Building Regulations
Improving the overall U-Value of the floor (XT/HYF HYFLOOR)
125x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF is a 125mm thick engineered floor insulation system used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed professional..
125x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
150mm Floor Insulation Board Unilin XT/HYF, consisting of a rigid polyisocyanurate core between low emissivity gas tight facings used for underfloor heating applications.
Unilin Hyfloor XT/HYF has a superior thickness to performance ratio, allowing the lower targets required under Building Regula..
150mm Unilin XT/HYF HYFLOOR Thin-R Plus Floorboard Premium PIR
For use with underfloor heating, ground supported and suspended floors
Excellent lambda value (Thermal conductivity) of 0.021 W/mK
Unilin XT/HYF Meets U-Values specified in the Building Regulations
Improving the overall U-Value of the floor (XT/HYF HYFLOOR)
150x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF is a 150mm thick engineered floor insulation system used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed professional..
150x225x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
Unilin XT/HYF Hyfloor Strip System 100x450x1200mm is a floor insulation system with high performance foundation riser panels used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed ..
100x450x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
Unilin XT/HYF Hyfloor Strip System 110x450x1200mm is a 110mm thick floor insulation system with high performance foundation riser panels used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed an..
110x450x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
Unilin XT/HYF Hyfloor Strip System 125x450x1200mm is a 125mm thick floor insulation system with high performance foundation riser panels used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed an..
125x450x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
50mm Unilin XT/TF Thin-R Wall Board is a PIR rigid foam insulation board suitable for use with timber frame and steel frame wall constructions in new build and refurb projects.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conductivity of 0..
50mm Unilin XT/UF Thin-R is a versatile rigid foam insulation board used in ground supported floor slab construction, designed to achieve Future Home and Passive House Standards.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022W/mK ..
50mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
50mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
50mm Unilin XT/PR Thin-R Pitched Roof Insulation Board is a versatile rigid foam insulation board used in roof construction, designed to achieve Future Home and Passive House Standards.
XT/PR PIR Board is a high performance foil faced insulation foam board with a certified thermal conductivity of..
50mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
50mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
Unilin XT/HYF Hyfloor Strip System 150x450x1200mm is a floor insulation system with high performance foundation riser panels used to achieve Future Homes Standard and passive floor performance.
The Hyfloor Strip Foundation System provides effective insulation that has been detailed and installed ..
150x450x1200mm Hyfloor Strip Foundation System Unilin XT/HYF
Engineered floor insulation with high performance foundation riser panels
Used to achieve Future Homes Standard and passive floor performance
Hyfloor System that provides thermal performance and robust detailing
Suitable for use with built-in full fill and partial fill wall insulation
55mm Unilin XT/PR Thin-R Pitched Roof PIR Insulation Board is a rigid foam insulation board used in roof construction, designed to achieve Future Home and Passive House Standards.
XT/PR PIR Board is a high performance foil faced insulation foam board with a certified thermal conductivity of 0.022..
55mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
55mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
55mm Unilin XT/TF Thin-R Timber Frame PIR Rigid Foam Insulation Board is used between studs or as an insulating sheathing material for steel and timber framing wall constructions.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conductivity o..
55mm Unilin XT/UF Thin-R Insulation for Ground Supported Floor Slab is a rigid foam insulation sheet used in floor construction, designed to achieve Future Home and Passive House Standards.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of..
55mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
55mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
60mm Unilin XT/TF Timber Frame PIR Board (Thin-R) is a rigid foam insulation board used between studs or as an insulating sheathing material for timber framing wall constructions.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conductivity o..
60x1200x2400mm Unilin XT/PR Insulation Board is a PIR rigid foam insulation board used in roof construction, designed to achieve Future Home and Passive House Standards.
Unilin XT/PR is a high performance foil faced insulation foam board with a certified thermal conductivity of 0.022W/mK which he..
60mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
60mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
60mm x 1200mm x 2400mm Unilin XT/UF Insulation Board is a PIR rigid foam insulation board used in floor construction, designed to achieve Future Home and Passive House Standards.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022W/mK ..
60mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
60mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
65mm Unilin XT/PR Thin-R PIR Insulation Board is a rigid foil faced foam insulation board used in roof construction, designed to achieve Future Home and Passive House Standards.
Unilin XT/PR is a high performance foil faced insulation foam board with a certified thermal conductivity of 0.022W/mK ..
65mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
65mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
65mm Unilin XT/TF Thin-R Wall Insulation is a PIR rigid foam insulation board used between studs or as an insulating sheathing material for steel and timber framing wall constructions.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conductiv..
65mm Unilin XT/UF Thin-R PIR Insulation Board is a rigid foil faced foam insulation board used in floor construction, designed to achieve Future Home and Passive House Standards.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022W/mK ..
65mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
65mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
70mm Unilin XT/PR Thin-R is a roof insulation board used mainly in pitched roof construction, designed to achieve Future Home and Passive House Standards.
XT/PR is a high performance foil faced insulation foam board with a certified thermal conductivity of 0.022W/mK which helps to reduce thermal ..
70mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
70mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
70mm Unilin XT/TF (WALLS) Thin-R PIR Insulation Board is a foam insulation board used between studs or as an insulating sheathing material for steel and timber framing wall constructions.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conduc..
70mm Unilin XT/UF Thin-R is a floor insulation board used as an insulation for ground supported floor slab construction, designed to achieve Future Home and Passive House Standards.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022W/..
70mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
70mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
75mm Unilin XT/PR Thin-R is a pitched roof insulation board with rigid PIR foam core sandwiched between low emissivity foil facings used for under rafter or between and over joist applications.
XT/PR is a high performance foil faced insulation foam board with a certified thermal conductivity of 0..
75mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
75mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
75mm XT/TF Thin-R Unilin Wall PIR Insulation Board is a rigid foam insulation board with foil facers used between studs or as an insulating sheathing material for timber frame walls.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conductivit..
Unilin XT/UF Thin-R is a 75mm floor insulation board with rigid PIR foam core sandwiched between low emissivity foil facings used mainly as an insulation board for floor construction.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022..
75mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
75mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
80mm Unilin XT/PR Thin-R Pitched Roof PIR Insulation Board is an insulation sheet suitable for tiled or slated pitched warm roof spaces for both new build and refurbishment projects.
XT/PR is a high performance foil faced insulation foam board with a certified thermal conductivity of 0.022W/mK wh..
80mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
80mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
80mm Timber Frame PIR Insulation Board Unilin XT/TF Thin-R is suitable for use with timber frame and steel frame wall constructions in new build and refurbishment projects.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal conductivity of 0.022..
80mm Unilin XT/UF Thin-R Floor PIR Rigid Foam Insulation Board is an insulation sheet suitable for ground supported floor slab for both new build and refurbishment projects.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022W/mK which..
80mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
80mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
90mm Unilin XT/PR Thin-R Pitched Roof PIR Insulation Board is used for under rafter or between and over joist applications in tiled or slated pitched warm roof spaces.
XT/PR is a high performance foil faced insulation foam board with a certified thermal conductivity of 0.022W/mK which helps to re..
90mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
90mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills
90mm Unilin XT/TF Thin-R Wall Insulation is a PIR rigid foam insulation board used in steel and timber framing wall construction, designed to achieve Future Home and Passive House Standards.
XT/TF Unilin PIR Board is a high performance foil faced rigid insulation foam with a certified thermal con..
90mm Unilin XT/UF Thin-R Floor PIR Board is a rigid foam insulation sheet suitable for ground supported floor slab, XT/UF can be used for both new build and refurbishment projects.
XT/UF Underfloor Unilin PIR Board is a high performance insulation with a certified thermal conductivity of 0.022W/m..
90mm Unilin PIR Polyisocyanurate Rigid Foam Insulation Board
Declared Lambda value of 0.022 W/mK (Thermal Conductivity)
90mm x 1200mm x 2400mm Foil Faced PIR Insulation Sheet
Reducing heat loss and saving money on future energy bills