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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

10mm Grey Polystyrene (Graphite EPS) for External Wall Insulation (pack of 60)
sale!
Brand: Arbet Model and Size: 1000x500mm - 30m2
Delivery Time: In Stock 1-2 working days
10mm Grey Polystyrene (Graphite) is a high quality expanded polystyrene (EPS) board enhanced with integrated graphite within its bead structure and of grey colour. The high-purity graphite particles integrated within the insulation beads reflects radiant heat and significantly improves insulati..
£39.33 (£47.20 inc VAT)
£35.79
£42.95 inc VAT
10mm White Polystyrene Board (EPS) for External Wall Insulation (pack of 60)
sale!
Brand: Arbet Model and Size: 1000x500mm - 30m2
Delivery Time: In Stock 1-2 working days
10mm White Polystyrene Board is a very lightweight and easy to handle and install, expanded polystyrene (EPS) board specially designed to be used as a part of various external wall insulation systems. It can be used in applications requiring transfer of small mechanical loads.Please note polystyrene..
£36.29 (£43.55 inc VAT)
£33.02
£39.62 inc VAT
Brand: Kay-Metzeler Model and Size: 2400x1200mm - 34.56m2
Delivery Time: 2 - 3 working days
25mm EPS70 Kay-Metzeler boards are manufactured by cutting expanded foam blocks. These boards are placed above a concrete slab or a precast concrete floor in domestic ground-floor constructions and finished with a wearing layer of chipboard to meet the Building Regulations' U-value requirements. Kay..
Guide Price: £86.98
£104.38 inc VAT
Brand: Jablite Model and Size: 2400x1200 (34.56m2)
Delivery Time: 2 - 3 working days
25mm Jablite EPS is a lightweight cellular plastic material suitable for a wide range of building insulation applications. It is an excellent insulating medium which exhibits consistent thermal performance over the range of temperatures normally encountered in buildings. The material is versatile, l..
Guide Price: £86.98
£104.38 inc VAT
Brand: Jablite Model and Size: 2400x1200 - 34.56m2
Delivery Time: 1 - 2 weeks
50mm Jablite EPS 100 board is a lightweight and cost efficient product which can be used for insulation of different constructions, including roofs, floors and walls, since it provides constant and stable thermal performance under different temperature conditions. It is made from expanded polystyren..
Guide Price: £189.60
£227.52 inc VAT
40mm Jablite External Wall Polystyrene Insulation Board EPS - pack of 15
Guide Price
Brand: Jablite Model and Size: Jablite 40mm - 10.80m2
Delivery Time: 3 - 4 days
40mm Jablite External Wall Insulation Board is a very lightweight and easy to handle and install EPS 70wall board containing a flame-retardant additive, designed to be used as a part of various external wall insulation systems. It can be bonded or mechanically fixed to the wall. Installing insulatio..
30mm Finnfoam FL300 Extruded Polystyrene (XPS) Rebated Edge Insulation Board - 1235mm x 585mm
Guide Price
Brand: Finnfoam Model and Size: 1235mm x 585mm - 0.72m2
Delivery Time: 1-3 working days
30mm Finnfoam FL300 Extruded Polystyrene Insulation Board is a rebated edge high density extruded polystyrene board that can be used in various applications on buildings, including on DPC. Finnfoam FL300 is a closed-cell, moisture and frost-resistant, extremely strong polystyrene foam board wit..
Guide Price: £7.25
£8.70 inc VAT
Brand: Knauf Model and Size: 2400x1200mm - 2.88m2
Delivery Time: 1 - 2 days
22mm Knauf EPS Thermal Laminate Insulation Board is a perfect solution for insulation and drylining in walls and warm roof constructions, in both remodelling and new build projects. Consisting of 9.5mm tapered edge wallboard bonded to 12.5mm expanded polystyrene, offering great thermal and a level o..
£53.39
£64.07 inc VAT
25mm Polyfoam XPS Floorboard - Standard grade - Extruded Polystyrene Board (pack of 18)
Guide Price
Brand: Polyfoam XPS Model and Size: 2500x600mm - 27m2
Delivery Time: 5 - 7 days
25mm Polyfoam XPS Floorboard - Standard grade is a high strength extruded polystyrene board (XPS) suitable for any floor construction including below a concrete slab, below a screed and below chipboard. It can also be used as the external insulation layer in basement walls depth up to 2.50m.CHARACTE..
Guide Price: £134.20
£161.04 inc VAT
25mm Polyfoam XPS Floorboard - Extra grade - Extruded Polystyrene Board (pack of 18)
Guide Price
Brand: Polyfoam XPS Model and Size: 2500x600mm - 27m2
Delivery Time: 5 - 7 days
25mm Polyfoam XPS Floorboard - Extra grade is a high strength (kPA 300) extruded polystyrene board (XPS) suitable for any floor construction including below a concrete slab, below a screed and below chipboard. It can also be used as the external insulation layer in basement walls dept..
Brand: Polyfoam XPS Model and Size: 1250x600mm - 6m2
Delivery Time: 5 - 7 days
50mm Polyfoam XPS Floorboard - Super grade is a high strength (kPA 500) extruded polystyrene board (XPS) suitable for any floor construction especially high load applications such as car park floors and cold store floors. It is a lap jointed board.CHARACTERISTICSExcellent thermal cond..
Brand: Cellecta Model and Size: 600x2500mm - 1.50m2
Delivery Time: 2 - 4 days
40mm Hexatherm XFLOOR 300 extruded polystyrene thermal insulation boards are designed specifically for domestic, commercial and industrial flooring applications where a high resistance to compression and water absorption is required. XFLOOR floor insulation boards are ideal for a multitude of floor re..
50mm Cellecta Hexatherm XFLOOR 500 Thermal Floor XPS Insulation Board
Guide Price
Brand: Cellecta Model and Size: 600x1250mm - 0.75m2
Delivery Time: 2 - 4 days
50mm Hexatherm XFLOOR 500 extruded polystyrene thermal insulation boards are designed specifically for domestic, commercial and industrial flooring applications where a high resistance to compression and water absorption is required. XFLOOR floor insulation boards are ideal for a multitude of floor re..
Brand: Cellecta Model and Size: 600x1250mm - 0.75m2
Delivery Time: 2 - 4 days
50mm Cellecta Hexatherm XPOOL is a specially designed closed cell extruded polystyrene board, ideal for swimming pool bases and retaining walls, due to its high comprehensive strength, which allows it to withstand imposed long-term static load. Its extremely low water absorption allows it to be inst..
50mm Cellecta Hexatherm XROOF 300L Thermal Roof XPS Insulation Board
Guide Price
Brand: Cellecta Model and Size: 600x1250mm - 0.75m2
Delivery Time: 2 - 4 days
50mm Cellecta Hexatherm XROOF 300L is an extruded polystyrene thermal insulation board designed specically for inverted roof applications where a high resistance to compression and water absorption is essential. XROOF roof insulation boards are ideal for a multitude of roofing requirements, inc..
Brand: Cellecta Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 2 - 4 days
26mm Cellecta Hexatherm XCPL is a high performance extruded polystyrene thermal insulation board bonded to an high impact thermal laminate facing, suitable for car parks and soffits. It combines the benefits of high performance extruded polystyrene with a facing board to produce a composite thermal ..
Brand: Cellecta Model and Size: 600x2500mm - 1.50m2
Delivery Time: 2 - 4 days
30mm Cellecta Hexatherm XPERi board has an outstanding compressive strength, low water absorption and life-long thermal performance, make them the ideal insulation for basements and below ground applications. They feature an interlocking edge detail and are suitable for fixing externally against bas..
50mm Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board - XPS Insulation 50mm Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board - XPS Insulation
Guide Price
Brand: Cellecta Model and Size: 600x1250mm - 0.75m2
Delivery Time: 2 - 4 days
50mm Cellecta Hexatherm XDRAiN is a high performance extruded polystyrene inverted thermal roof boards, featuring integrated drainage channels on their underside, which speeds up the shedding of rainwater from the roof, eliminating the need for a separating drainage mat, making them ideal for green ..
Cellecta XFLO FF Underfloor Heating Insulation Board - XPS Insulation - 250 grade
Guide Price
Brand: Cellecta Model and Size: 600x2500mm - 1.50m2
Delivery Time: 7 - 10 days
250 grade Cellecta XFLO FF Underfloor Heating Insulation Board is a high performance extruded polystyrene underfloor insulation board, featuring channels to suit different pipe diameters and spacing required. Once covered with ScreedBoard 20, they would provide a quality heating solution for do..
Brand: Sundolitt Model and Size: 1200x600mm - 10.08m2
Delivery Time: 2 - 3 working days
30mm Sundolitt XPS300 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. Sundolitt XPS300 is highly water resistance, so can be stored and installed..
Guide Price: £83.47
£100.16 inc VAT
38mm Cellecta Hexatherm XCHiP Thermal Laminate Chipboard - XPS Insulation
Guide Price
Brand: Cellecta Model and Size: 600x2400mm - 1.44m2
Delivery Time: 2 - 4 days
38mm Cellecta XCHiP is a high performance insulation board with a 18mm chipboard laminate facing. Cellecta XCHiP combines the benefits of HEXATHERM high performance thermal insulation with a P5 moisture resistant, tongue and groove chipboard to produce a high compressive strength, interlocking floor..
Brand: Cellecta Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 2 - 4 days
62mm Cellecta Hexatherm XPLY is a high performance extruded polystyrene thermal insulation roof board bonded to a 12mm plywood laminate facing, also suitable for internal walls and floors. It combines the benefits of high performance extruded polystyrene with a facing board to produce a composite th..
56mm Cellecta Hexatherm XMD Vertical Up-Stand Roof Board - XPS Insulation
Guide Price
Brand: Cellecta Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 2 - 4 days
56mm Cellecta Hexatherm XMD is a high performance extruded polystyrene thermal insulation board bonded to a 6mm thermal laminate facing, suitable for vertical upstands. It combines the benefits of high performance extruded polystyrene with a facing board to produce a composite thermal board to suit ..
Brand: British Gypsum Model and Size: Basic - 22mm
Delivery Time: 2 - 3 working days
22mm Gyproc Thermaline Basic is a Gyproc wall board factory-bonded to a 12.5mm expanded polystyrene insulant that is both CFC and HCFC-free. The Gyproc board consists of an aerated 9.5mm gypsum core encased  in, and firmly bonded to, strong paper liners. The expanded polystyrene insulant is the..
£31.96
£38.35 inc VAT
Brand: British Gypsum Model and Size: Plus - 27mm
Delivery Time: 2 - 3 working days
27mm Gyproc Thermaline Plus is a 9.5mm Gyproc wall board factory-bonded to a 17.5mm extruded polystyrene insulant that is both CFC and HCFC-free. The Gyproc board consists of an aerated gypsum core encased  in, and firmly bonded to, strong paper liners. The extruded polystyrene insulant is..
£56.75
£68.10 inc VAT
Brand: Kay-Metzeler Model and Size: 1200x2400 - 2.88m2
Delivery Time: 2 - 3 working days
50mm Claylite is a low density expanded polystyrene compressible-fill material which can be used to reduce the pressure exerted on reinforced concrete ground beams or on the vertical face of concrete foundations, caused by the expansions of clay soils (clay heave) during the life of the structure. C..
Guide Price: £20.46
£24.55 inc VAT
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..
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..
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