Polystyrene Boards

Polystyrene is a material with uniformly small closed cells and a smooth skin which make it suitable for a wide range of demanding insulating applications.

  • Expanded polystyrene (EPS),
  • Extruded polystyrene (XPS)
  • Compressible (shrinkable) EPS
  • Insulated Plasterboards EPS

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 80-100°C. 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 material’s 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.


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10mm Grey Polystyrene (Graphite EPS) for External Wall Insulation (pack of 60)

10mm Grey Polystyrene (Graphite EPS) for External Wall Insulation (pack of 60)

1000x500mm - 30m2  Delivery Time: 2 - 4 days

£25.92 (£31.10 inc VAT)

£0.86/m2 (£1.03/m2 inc VAT)

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..

£25.92 (£31.10 inc VAT)

£0.86/m2 (£1.03/m2 inc VAT)

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10mm White Polystyrene Board (EPS) for External Wall Insulation (pack of 60)

10mm White Polystyrene Board (EPS) for External Wall Insulation (pack of 60)

1000x500mm - 30m2  show quantity discountsDelivery Time: 2 - 3 days

£21.60 (£25.92 inc VAT)

£0.72/m2 (£0.86/m2 inc VAT)

show quantity discounts

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.CHARACTERISTICSLightwei..

£21.60 (£25.92 inc VAT)

£0.72/m2 (£0.86/m2 inc VAT)

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25mm EPS70 Polystyrene Insulation Board Kay-Metzeler (pack of 12)

25mm EPS70 Polystyrene Insulation Board Kay-Metzeler (pack of 12)

2400x1200mm - 34.56m2  show quantity discountsDelivery Time: 2 - 3 days

£52.26 (£62.71 inc VAT)

£1.51/m2 (£1.81/m2 inc VAT)

show quantity discounts

25mm EPS70 Kay-Metzeler boards are produced by cutting expanded foam blocks. Placed above a concrete slab or a precast concrete floor in domestic ground-floor constructions, then finished with a wearing layer of chipboard to satisfy the Building Regulations' U-value requirements. Kay-Metzeler achie..

£52.26 (£62.71 inc VAT)

£1.51/m2 (£1.81/m2 inc VAT)

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25mm EPS70 Polystyrene Insulation Board Jablite (pack of 12)

25mm EPS70 Polystyrene Insulation Board Jablite (pack of 12)

2400x1200 (34.56m2)  show quantity discountsDelivery Time: 2 - 3 days

£52.26 (£62.71 inc VAT)

£1.51/m2 (£1.81/m2 inc VAT)

show quantity discounts

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..

£52.26 (£62.71 inc VAT)

£1.51/m2 (£1.81/m2 inc VAT)

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50mm EPS100 Polystyrene Insulation Board Jablite (pack of 12)

50mm EPS100 Polystyrene Insulation Board Jablite (pack of 12)

2400x1200 - 34.56m2  Delivery Time: 3 - 7 days

Guide Price: £156.00 (£187.20 inc VAT)

£4.51/m2 (£5.41/m2 inc VAT)

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: £156.00 (£187.20 inc VAT)

£4.51/m2 (£5.41/m2 inc VAT)

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40mm Jablite External Wall Polystyrene Insulation Board EPS - pack of 15

40mm Jablite External Wall Polystyrene Insulation Board EPS - pack of 15

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..

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30mm FLOORMATE 300A Styrofoam - Extruded Polystyrene Floor Insulation Board

30mm FLOORMATE 300A Styrofoam - Extruded Polystyrene Floor Insulation Board

1200 x 600mm -0.72m2  Delivery Time: 2 - 3 days

Guide Price: £4.32 (£5.18 inc VAT)

£6.00/m2 (£7.20/m2 inc VAT)

30mm FLOORMATE 300-A Extruded Polystyrene Floor Insulation Board is designed for use across the flooring spectrum from residential to commercial buildings such as office and retail units. FLOORMATE 300-A is a solution for insulating groundbearing and suspended floors in new build and renov..

Guide Price: £4.32 (£5.18 inc VAT)

£6.00/m2 (£7.20/m2 inc VAT)

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22mm Knauf EPS Thermal Laminate Insulation Board

22mm Knauf EPS Thermal Laminate Insulation Board

2400x1200mm - 2.88m2  show quantity discountsDelivery Time: 1 - 2 days

£16.68 (£20.02 inc VAT)

£5.79/m2 (£6.95/m2 inc VAT)

show quantity discounts

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 expanded polystyrene, offering great thermal and a level of acous..

£16.68 (£20.02 inc VAT)

£5.79/m2 (£6.95/m2 inc VAT)

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42.5mm Knauf Polyfoam Linerboard - 30mm Extruded Polystyrene (XPS) + 12.5mm Plasterboard

42.5mm Knauf Polyfoam Linerboard - 30mm Extruded Polystyrene (XPS) + 12.5mm Plasterboard

1200x2400mm - 2.88m2  Delivery Time: 2 - 3 days

42.5mm Polyfoam Linerboard is a high performance, tapered edge, rigid composite internal insulated plasterboard with 30mm extruded polystyrene (XPS) bonded to 12.5mm plasterboard. It allows the thermal insulation and lining of internal, semi-exposed and exposed walls in one simple operation.&nb..

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25mm Ravatherm Polyfoam Floorboard - Standard grade - Extruded Polystyrene Board (pack of 18)

25mm Ravatherm Polyfoam Floorboard - Standard grade - Extruded Polystyrene Board (pack of 18)

2500x600mm - 27m2  Delivery Time: 1 - 2 days

25mm Ravatherm Polyfoam 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.CH..

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25mm Ravatherm Polyfoam Floorboard - Extra grade - Extruded Polystyrene Board (pack of 18)

25mm Ravatherm Polyfoam Floorboard - Extra grade - Extruded Polystyrene Board (pack of 18)

2500x600mm - 27m2  Delivery Time: 3 - 5 days

25mm Ravatherm Polyfoam Floorboard - Extra 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..

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50mm Ravatherm Polyfoam Floorboard - Super grade - Extruded Polystyrene Board (pack of 8)

50mm Ravatherm Polyfoam Floorboard - Super grade - Extruded Polystyrene Board (pack of 8)

1250x600mm - 6m2  Delivery Time: 3 - 5 days

50mm Ravatherm Polyfoam Floorboard - Super grade is a high strength 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 conducti..

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25mm Yelofoam X2i Cellecta

25mm Yelofoam X2i Cellecta

2500x600mm - 1.5m2  Delivery Time: 2 - 4 days

Guide Price: £16.72 (£20.06 inc VAT)

£11.15/m2 (£13.38/m2 inc VAT)

25mm Cellecta Yelofoam is made of extruded polystyrene (XPS) foam blown with a mix of HFA & CO2 gases, containing a yellow pigment, flame retardant additive and nucleating agent. Cellecta insulation products are manufactured to the highest possible specification. Ex All product’s’ physical prope..

Guide Price: £16.72 (£20.06 inc VAT)

£11.15/m2 (£13.38/m2 inc VAT)

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40mm Cellecta Hexatherm XFLOOR 300 Thermal Floor Insulation Board

40mm Cellecta Hexatherm XFLOOR 300 Thermal Floor Insulation Board

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..

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50mm Cellecta Hexatherm XFLOOR 500 Thermal Floor Insulation Board

50mm Cellecta Hexatherm XFLOOR 500 Thermal Floor Insulation Board

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..

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50mm Cellecta Hexatherm XPOOL Swimming Pool XPS Insulation Board

50mm Cellecta Hexatherm XPOOL Swimming Pool XPS Insulation Board

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. It’s extremely low water absorption allows it to be ins..

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50mm Cellecta Hexatherm XROOF 300L Thermal Roof Insulation Board

50mm Cellecta Hexatherm XROOF 300L Thermal Roof Insulation Board

600x1250mm - 0.75m2  Delivery Time: 2 - 4 days

50mm Cellecta Hexatherm XROOF 300L is an extruded polystyrene thermal insulation board designed specifically 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, in..

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26mm Cellecta Hexatherm XCPL High Impact Faced Thermal Laminate Board for Car Park Soffits

26mm Cellecta Hexatherm XCPL High Impact Faced Thermal Laminate Board for Car Park Soffits

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 ..

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30mm Cellecta Hexatherm XPeri Perimeter Wall Insulation Board

30mm Cellecta Hexatherm XPeri Perimeter Wall Insulation Board

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..

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50mm Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board

50mm Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board

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 ..

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30mm Sundolitt XPS300 Extruded Polystyrene Board (pack of 14)

30mm Sundolitt XPS300 Extruded Polystyrene Board (pack of 14)

1200x600mm - 10.08m2  show quantity discountsDelivery Time: 2 - 3 days

Guide Price: £58.12 (£69.74 inc VAT)

£5.77/m2 (£6.92/m2 inc VAT)

show quantity discounts

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: £58.12 (£69.74 inc VAT)

£5.77/m2 (£6.92/m2 inc VAT)

show quantity discounts
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38mm Cellecta Hexatherm XCHiP Thermal Laminate Chipboard

38mm Cellecta Hexatherm XCHiP Thermal Laminate Chipboard

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..

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62mm Cellecta Hexatherm XPLY Plywood Thermal Laminate Roof Board

62mm Cellecta Hexatherm XPLY Plywood Thermal Laminate Roof Board

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..

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56mm Cellecta Hexatherm XMD Vertical Up-Stand Roof Board

56mm Cellecta Hexatherm XMD Vertical Up-Stand Roof Board

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 ..

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30mm Kingspan Styrozone N300R XPS Board (pack of 14)

30mm Kingspan Styrozone N300R XPS Board (pack of 14)

N300R 30mm - 10.50m2  show quantity discountsDelivery Time: 3 - 5 days

£62.66 (£75.19 inc VAT)

£5.97/m2 (£7.16/m2 inc VAT)

show quantity discounts

30mm Kingspan Styrozone N300R 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 wate..

£62.66 (£75.19 inc VAT)

£5.97/m2 (£7.16/m2 inc VAT)

show quantity discounts
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30mm Kingspan Styrozone H350R Flat Roof XPS Board (pack of 14)

30mm Kingspan Styrozone H350R Flat Roof XPS Board (pack of 14)

1250x600mm - 10.50m2  show quantity discountsDelivery Time: 3 - 5 days

£74.38 (£89.26 inc VAT)

£7.08/m2 (£8.50/m2 inc VAT)

show quantity discounts

Kingspan Styrozone H350R Flat Roof XPS Board is highly effective rigid insulation board made from extruded polystyrene core covered with smooth skin on both sides. It is especially designed for protected membrane flat roofs, but is also used in green roofs as a popular alternative to tradi..

£74.38 (£89.26 inc VAT)

£7.08/m2 (£8.50/m2 inc VAT)

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50mm Kingspan Styrozone N500R XPS Board (pack of 8)

50mm Kingspan Styrozone N500R XPS Board (pack of 8)

1250x600mm - 6m2  show quantity discountsDelivery Time: 2 - 3 days

£77.70 (£93.24 inc VAT)

£12.95/m2 (£15.54/m2 inc VAT)

show quantity discounts

50mm Kingspan Styrozone N 500 R 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 wa..

£77.70 (£93.24 inc VAT)

£12.95/m2 (£15.54/m2 inc VAT)

show quantity discounts
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other thicknesses
22mm Gyproc Thermaline Basic Insulated Plasterboard

22mm Gyproc Thermaline Basic Insulated Plasterboard

Basic - 22mm  show quantity discountsDelivery Time: 2 - 3 days

£16.34 (£19.61 inc VAT)

£5.67/m2 (£6.80/m2 inc VAT)

show quantity discounts

22mm Gyproc Thermaline Basic is a Gyproc wall board factory-bonded to an expanded 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 expanded polystyrene insulant is then further bo..

£16.34 (£19.61 inc VAT)

£5.67/m2 (£6.80/m2 inc VAT)

show quantity discounts
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27mm Gyproc Thermaline Plus Insulated Plasterboard

27mm Gyproc Thermaline Plus Insulated Plasterboard

Plus - 27mm  show quantity discountsDelivery Time: 2 - 3 days

£26.66 (£31.99 inc VAT)

£9.26/m2 (£11.11/m2 inc VAT)

show quantity discounts

27mm Gyproc Thermaline Plus is a Gyproc wall board factory-bonded to an expanded 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 expanded polystyrene insulant is then furthe..

£26.66 (£31.99 inc VAT)

£9.26/m2 (£11.11/m2 inc VAT)

show quantity discounts
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50mm Claylite - Protection Against Soil Movement

50mm Claylite - Protection Against Soil Movement

1200x2400 - 2.88m2  show quantity discountsDelivery Time: 2 - 3 days

£20.82 (£24.98 inc VAT)

£7.23/m2 (£8.68/m2 inc VAT)

show quantity discounts

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 st..

£20.82 (£24.98 inc VAT)

£7.23/m2 (£8.68/m2 inc VAT)

show quantity discounts
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