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Polystyrene Boards

Extruded polystyrene is made by mixing polystyrene pellets with various ingredients to liquefy them.  A blowing agent is then injected into the mixture to form gas bubbles. The foaming liquid is forced through the shaping die and, when cooled, it produces a closed cell foam that is rigid and water resistant.

Expanded polystyrene is made from expandable polystyrene, which is a rigid cellular plastic containing an expansion agent. The raw material is heated in special machines called pre-expanders with steam at temperatures of between 80-100C. The density of the material falls from some 630kg/m3 to values of between 10 and 35kg/m3. During this process of pre-expansion the raw materials compact beads turn into cellular plastic beads with small closed cells that hold air in their interior.

On cooling, the recently expanded particles form a vacuum in their interior and this is compensated for by air diffusion during its intermediate maturing in aerated silos. The beads are dried at the same time. This is how the beads achieve greater mechanical elasticity and improve expansion capacity. Then the stabilised pre-expanded beads are transported to moulds where they are again subjected to steam so that the beads bind together. In this way moulded shapes or large blocks are obtained. They are later sectioned to the required shape like boards, panels, cylinders etc.

Extruded polystyrene is slightly denser and therefore slightly stronger in compression than expanded polystyrene but has a lower thermal conductivity. It has a closed cell structure with very low water absorption and vapour transmission properties. It will withstand continuous temperatures up to 75 degrees C and can be easily worked with normal hand tools.

In order to comply with EC regulations, blowing agents should be CFC and HCFC free--zero ozone depletion potential--and have low global warming impact.

APPLICATION

  • Basements and walls,
  • Masonry cavity walls,
  • Ground bearing floors,
  • Suspended concrete floors,
  • Separating floors,
  • Underfloor heating system,
  • Exposed soffit,
  • Pitched roofs,
  • Green/paved roofs, 
  • Because of its high resistance to water absorption, extruded polystyrene can be used for floor insulation below the concrete slab and on inverted roofs where its resistance to mechanical damage from foot traffic is advantageous, 
  • Polystyrene is also available laminated to tongue and groove moisture resistant flooring grade particle board for direct application to concrete floor slabs and laminated to plasterboard as a wall board.

CHARACTERISTICS

  • Low thermal conductivity - Due to its closed air-filled cell structure that inhibits the passage of heat or cold, a high capacity for thermal insulation is achieved.
  • Lightweight and ease of handling and installation,
  • Has excellent mechanical properties making it good choice for load-bearing roof insulation, sub-pavement flooring, road-building, as load-bearing insulation.
  • Low water absorption - does not absorb moisture and its thermal and mechanical properties are unaffected by damp, humidity or moisture.
  • Chemical resistance - polystyrene is completely compatible with other materials used in construction including cements, plasters, salt etc.
  • Ageing resistance - material's properties are retained will last as long as the building itself.
  • Polystyrene is not altered by external agents such as fungi or parasites as they find no nutritional value in the material.

R-value Comparison Chart for Polystyrene Insulation products available at Insulation Shop


Legend

1*  Cellecta Yelofoam X2i, Cellecta Hexatherm XPLY Plywood Thermal Laminate Roof Board

2*  Knauf Polyfoam Linerboard XPS

3*  Grey Polystyrene (Graphite) EPS

4*  Floormate 300A XPS, Cellecta Hexatherm XROOF 300L XPS, Cellecta Hexatherm XFLOOR 300 XPS, Cellecta Hexatherm XCHiP Thermal Laminate Chipboard, Cellecta Hexatherm XCPL Board, Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board, Ravatherm Polyfoam Floorboard, Gyproc Thermaline Plus Insulated Plasterboard

5*  Cellecta Hexatherm XROOF 300L XPS, Cellecta Hexatherm XFLOOR 500 XPS, Cellecta Hexatherm XCHiP Thermal Laminate Chipboard, Cellecta Hexatherm XCPL Laminated Board, Cellecta Hexatherm XPeri Perimeter Wall Insulation Board, Cellecta Hexatherm XMD Vertical Up-Stand Roof Board, Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board, Sundolitt XPS300 Extruded Polystyrene Board, Ravatherm Polyfoam Floorboard - Super grade

6*  Cellecta Hexatherm XPOOL Swimming Pool XPS Insulation Board, Kingspan Styrozone N300R XPS Board, Cellecta Hexatherm XFLOOR 500 Thermal Floor Insulation Board, Cellecta Hexatherm XPeri Perimeter Wall Insulation Board

7*  EPS100 Polystyrene Insulation Board Jablite, Kingspan Styrozone N500R XPS Board

8*  EPS70 Polystyrene Insulation Board Kay-Metzeler

9*  Jablite EPS70 Polystyrene Insulation Board, Jablite External Wall Polystyrene Insulation Board EPS, Knauf EPS Thermal Laminate Insulation Board

10*  Gyproc Thermaline Basic insulated plasterboard

11*  White Polystyrene Board

CHOOSE MANUFACTURERS or scroll down to see products (show)

Brand: Jablite Model and Size: 2400x1200mm - 2.88m2
Delivery Time: 1-3 working days
50mm Claymaster is an EPS compressible-fill material that helps prevent potential foundation problems caused by moisture movement in soils with a high proportion of mineral particles below 0.002mm (clay heave). It can be used as permanent shuttering for cast in-situ reinforced concrete, relieving pr..
Guide Price: £15.30
£18.36 inc VAT
Brand: Cordek Model and Size: HX S 90mm - 2.88m2
Delivery Time: 3 - 7 days
90mm Cellcore HX S is a product specially designed to provide foundation protection from ground heave effects when installed under reinforced concrete floor slabs. It is consisted of specially moulded hexagonal cellular expended polystyrene, available in a number of different depths and grades. Grou..
Brand: Cordek Model and Size: HX B 85mm - 2.88m2
Delivery Time: 3 - 7 days
85mm Cellcore HX B Under Beam is specially designed to provide foundation protection from ground heave effects when installed beneath reinforced ground beams and pile caps. It is consisted of specially moulded hexagonal cellular Filcor expended polystyrene, available in a number of different de..
Filcor - Expanded Polystyrene (EPS) Structural Fill Material
Guide Price
Brand: Cordek Model and Size: Filcor EPS
Delivery Time: 3 - 5 days
Filcor EPS is an Expanded Polystyrene lightweight structural fill alternative to more traditional fill materials or as a lightweight void former in structural concrete. The standard (and  the maximum) sheet or block size is 2400mm long x 1200mm wide x required thickness. The thicknesses fr..
Brand: Marmox Model and Size: 1250x600mm - 7.50m2
Delivery Time: 2 - 3 working days
4mm Marmox Multiboard Waterproof Insulation Board is a multifunctional board made from closed cellular structure rigid XPS foam, with a polymer-concrete coating on both sides, reinforced with a fibreglass mesh encased by carbon nano-fibres.CHARACTERISTICSCompletely waterproof,Very versatile and mult..
£94.08
£112.90 inc VAT
Brand: Marmox Model and Size: 100mm - Free Delivery
Delivery Time: 2 - 3 working days
100mm Marmox Thermoblock is a load-bearing and highly insulating block made from extruded polystyrene (XPS) reinforced with polymer-modified concrete cylinders and covered with reinforced polymer-modified concrete mortar. It is designed to be a perfect, thermally insulating replacement for wall bric..
£175.60
£210.72 inc VAT
Brand: Marmox Model and Size: 100mm - 0.72m2 - Free Delivery
Delivery Time: 2 - 3 working days
100mm Marmox Thermoblock is a load-bearing and highly insulating block made from 100mm thick extruded polystyrene (XPS) reinforced with polymer-modified concrete cylinders and covered with reinforced polymer-modified concrete mortar. It is designed to be a perfect, thermally insulating replacement f..
£169.77
£203.72 inc VAT
Brand: Polyfoam XPS Model and Size: 1200x2400mm - 195.84m2
Delivery Time: 5 - 7 days
17.5mm Polyfoam XPS Laminating Board is a high strength (kPA 200) extruded polystyrene board (XPS) that can be used as a thermal and structural insulation as a fabrication board for a wide variety of manufacturing processes and applications. This board has high resistance to water absorption an..
21mm Polyfoam XPS Laminating Board - (pallet of 56) - 1220mm x 3000mm
Guide Price
Brand: Polyfoam XPS Model and Size: 1220x3000mm - 204.96m2
Delivery Time: 5 - 7 days
21mm Polyfoam XPS Laminating Board is a high strength (kPA 200) extruded polystyrene board (XPS) that can be used as a thermal and structural insulation as a fabrication board for a wide variety of manufacturing processes and applications. This board has high resistance to water absorption and ..
Brand: Kingspan Model and Size: 1250x600mm - 10.50m2
Delivery Time: 7 - 10 days
30mm Kingspan GreenGuard GG300 XPS Board is an insulation for inverted roofs, basements, car park decks, and heavy-duty commercial, industrial and cold store flooring. They have high compressive strength, and a closed cell structure which resists the absorption of ground water and the passage of wat..
£102.70
£123.24 inc VAT
30mm Soprema XPS SL Extruded Polystyrene Board (pack of 14) 30mm Soprema XPS SL Extruded Polystyrene Board (pack of 14)
Guide Price
Brand: Soprema Model and Size: 1250x600mm - 10.50m2
Delivery Time: 2 - 3 working days
30mm Soprema XPS SL is an extremely durable, high strength extruded polystyrene thermal insulation board offering high water resistance for flat and pitched roofs. It can be stored and installed in severe wet weather conditions with no deterioration during its life. It is easy to cut and customise o..
Guide Price: £102.21
£122.65 inc VAT
30mm Styrodur 3000CS Extruded Polystyrene Board XPS -  1265mm x 615mm - pack of 14
Guide Price
Model and Size: 1265mm x 615mm - 10.92m2
Delivery Time: 2 - 3 working days
30mm Styrodur 3000CS Extruded Polystyrene Board XPS is an extremely durable thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. Styrodur 3000CS is the all-round thermal insulation board with smooth surface and rebated on all four edges for ..
40mm Ravatherm XPS X 300 SB Extruded Polystyrene Board -  2500mm x 600mm - pack of 10
Guide Price
Brand: Ravago Building Solutions Model and Size: 2500x600mm - 15m2 per pack
Delivery Time: 5 - 7 days
40mm Ravatherm XPS X 300 SB Extruded Polystyrene Board is an extremely durable thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. It is a lightweight board that is able to withstand extreme loads. It is highly water resistant polystyrene t..
50mm Heaveguard - Expanded Polystyrene Board Used Against Ground Heave - 2400mm x 1200mm
Guide Price
Brand: Cordek Model and Size: 2400x1200mm - 2.88m2
Delivery Time: 2 - 3 working days
50mm Heaveguard is a compressible low density Expanded Polystyrene (EPS) board, used when foundations need to be protected against ground heave and against lateral heave. Heaveguard is used to prevent potential problems in foundations due to moisture movement in soils, such as clay heave, reducing p..
Brand: Kingspan Model and Size: 1250x600mm - 6.00m2
Delivery Time: 5 - 7 days
50mm Kingspan GreenGuard GG500 XPS Board is an insulation for car park decks, and heavy-duty commercial, industrial and cold store flooring. They have high compressive strength, and a closed cell structure which resists the absorption of ground water and the passage of water vapour. The GreenGu..
£127.04
£152.45 inc VAT
Brand: Polyfoam XPS Model and Size: 1250x600mm - 6.75m2
Delivery Time: 5 - 7 days
50mm Polyfoam XPS Roofboard - Extra grade is a high strength (kPA 300) extruded polystyrene board (XPS) with high compressive strength highly resistant to water absorption  suitable for roofing applications. It is a lap jointed board and withstands both occasional and long term s..
Brand: Ravago Building Solutions Model and Size: 1250x600mm - 6.0m2
Delivery Time: 2 - 3 working days
50mm Ravatherm XPS X 300 SL Extruded Polystyrene Board is an extremely durable thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. It is a lightweight board that is able to withstand extreme loads. It is highly water resistant polystyrene t..
Brand: Ravago Building Solutions Model and Size: 1250x600mm - 6.0m2
Delivery Time: 2 - 3 working days
50mm Ravatherm XPS X 500 SL Extruded Polystyrene Board is an extremely durable thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. It is a lightweight board that is able to withstand extreme loads. It is highly water resistant polystyrene t..
Brand: Ravago Building Solutions Model and Size: 1250x600mm - 6.0m2
Delivery Time: 2 - 3 working days
50mm Ravatherm XPS X 700 SL Extruded Polystyrene Board is an extremely durable thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. It is a lightweight board that is able to withstand extreme loads. It is highly water resistant polystyrene t..
Brand: Polyfoam XPS Model and Size: 1200x600mm - 30.24m2
Delivery Time: 5 - 7 days
56mm Polyfoam XPS Upstand Board is a high strength (kPA 200) extruded polystyrene laminated board used for the thermal insulation and protection of upstand and parapet walls. Polyfoam XPS Upstand board consists of a 50mm high performance rigid extruded polystyrene (XPS) with a tough, weather re..
60mm Kingspan GreenGuard GG700 XPS Board (pack of 7) - Insulation for Car Park Decks, Heavy-duty Industrial, Commercial and Cold Store Floors
Guide Price
Brand: Kingspan Model and Size: 1250x600mm - 5.25m2
Delivery Time: 3 - 5 days
60mm Kingspan GreenGuard GG700 XPS Board is an insulation for car park decks, and heavy-duty commercial, industrial and cold store flooring. They have high compressive strength, and a closed cell structure which resists the absorption of ground water and the passage of water vapour. The GreenGu..
Brand: Cellecta Model and Size: 75mm - 2.5m
Delivery Time: 3 - 5 days
75mm Cellecta Unicloser X Double Flange Cavity Closer made of  Hexatherm extruded polystyrene with two U-PVC damp proof course profiles. This cavity closer will eliminates cold bridging around window and door openings.CHARACTERISTICSHigh quality Hexatherm extruded polystyrene,2 R..
Brand: Cellecta Model and Size: 75mm - 2.5m
Delivery Time: 3 - 5 days
75mm Cellecta Unicloser X Single Flange Cavity Closer made of  Hexatherm extruded polystyrene with one U-PVC damp proof course profiles. This cavity closer will eliminates cold bridging around window and door openings.CHARACTERISTICSHigh quality Hexatherm extruded polystyrene,Rigid U-PVC p..
Brand: Cordek Model and Size: 85mm x 450mm x 450mm
Delivery Time: 2 - 3 working days
85mm x 450mm x 450mm Heaveguard Pile Collar is a compressible low density Expanded Polystyrene (EPS), used to support pile heads against lateral ground heave. It is a part of the Cordek Cellcore ground heave system. The pile collar will fit securely around the pile head to produce a square edg..
Brand: Blue Dolphin Model and Size: 270mm x 130mm
Delivery Time: 1 - 2 days
Abrasive Tool (Grinder) for Polystyrene EWI Sheets Blue Dolphin - 270mm x 130mm with an ergonomic plastic handle and removable steel piece. It is used for rasping and smoothing polystyrene boards used for insulating external walls. The abrasive surface shaves off the unwanted sections of the po..
Guide Price: £20.25
£24.30 inc VAT
Brand: EWI Pro Model and Size: 25kg
Delivery Time: 2 - 3 working days
EWI-220 Basecoat is  specially designed to fix fibreglass mesh reinforced layer for EPS thermal insulation systems. It can also be used for fixing EPS panels to substrates, such as such as concrete, light-aggregate and cellular concrete, ceramic or silicate surfaces. It can be used in fix EPS p..
£16.20
£19.44 inc VAT
Brand: EWI Pro Model and Size: 25kg
Delivery Time: 2 - 3 working days
EWI-221 is a winter adhesive that would allow you to work in temperatures as low as zero degrees. It is used to mount EPS boards on to external surfaces and also to fix the reinforcement layer on those boards. Once mixed with clean water it becomes a homogeneous grey adhesive putty. It has excellent..
£15.38
£18.46 inc VAT
Brand: EWI Pro Model and Size: 25kg
Delivery Time: 2 - 3 working days
EWI-225 Premium is a very strong and most flexible adhesive used to fix polystyrene and mineral wool panels and also to embed reinforced mesh. It consists of mineral binders, synthetic fibres, mineral fillers and modifying admixtures. It is used in render-only systems as a basecoat, where it elimina..
£16.29
£19.55 inc VAT
Brand: EWI Pro Model and Size: 25kg
Delivery Time: 2 - 3 working days
EWI-269 Lightweight Basecoat is a breathable and flexible levelling adhesive that can be used internally or externally on lightweight masonry structures and stonework. It consists of grey Portland cement, hydrated lime and perlite, and has a declared thermal efficiency of 0.47W/mK. This basecoat can..
£12.83
£15.40 inc VAT
Brand: EWI Pro Model and Size: 5L
Delivery Time: 2 - 3 working days
EWI-301 Water Based Primer is deep penetrating primer used to prepare walls before installing external wall insulation or render-only systems. EWI-301 limits the absorptive capacity of substrates and also strengthen and stabilise dusty substrates. It helps to enhance adhesion external wall insulatio..
£15.34
£18.41 inc VAT
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