Extruded Polystyrene Insulation XPS

Extruded Polystyrene Insulation (XPS) is a high-performance, closed-cell rigid insulation. XPS products are manufactured in proprietary processes that melt plastic resin and additives into a molten material, which is extruded through a die where it expands and cools into a uniform closed cell rigid board with no voids or pathways for moisture to enter. This makes XPS insulation inherently moisture resistant. XPS insulation is manufactured in a variety of board sizes with square and tapered edges. Tapered edge units are manufactured for the use in roofing applications, where the insulation is used to create slope for positive drainage. It works excellently in the ballasted single-ply roof assembly, where a roof membrane is placed over the insulation and ballasted with rock or other material.


XPS can be used in asphalt built-up roofing systems, however provisions must be made to protect the insulation from heat and solvent-based products. XPS is more common for below-grade waterproofing, and used mainly as below DPC level external wall insulation. It is also utilized for insulating external building walls, where XPS insulation is placed over a barrier membrane, with the external render, siding or cladding system installed over the insulation layer.

XPS is manufactured through a continuous extrusion process. When the molten material is extruded through a die where it expands into a uniform closed-cell rigid foam insulation board with no voids. This resistance to water absorption stabilises the R-value in the long range.  XPS maintains its closed void cell structure and maintains its resistance to water absorption even under freeze-thaw cycling. When absorbed water freezes and expands, the product breaks and open further resulting in increased water absorption and lost structural integrity. Here the XPS insulation's closed void cell structure helps by resisting any absorption of water. XPS broads are therefore used in below-grade, under pavement, car park applications.

Benefits
  • Recyclable,
  • Won’t support mould or mildew growth,
  • Long-term, stable R-value,
  • Can be placed below grade,
  • Can be utilized for inverted assemblies,
  • XPS insulation is more moisture-resistant than EPS insulation,
  • XPS insulation holds R-value better than EPS insulation at lower mean temperatures when water is present.

Precautions
  • Exposure to sun will deteriorate the product,
  • Solvents/solvent-based materials cause irreversible damage,
  • Temperatures above 120°C will melt polystyrene,
  • Incompatible with certain thermoplastics--are known to draw plasticizers out of thermoplastic membranes, causing permanent degradation,
  • Polystyrene is flammable, requiring proper placement in any assembly.
Application

The purpose of building insulation is to reduce heating and cooling energy consumption, contribute to durability, and provide comfort for the occupants. However, the exposure to moisture severely affects a material’s thermal performance. XPS insulation has unique properties making it the suitable choice for applications, where the resistance to water absorption is highly needed. Water is an excellent conductor of heat, and if the insulation absorbs moisture, it can degrade that material’s R-value, negatively affecting energy savings and the comfort of those inside the building. So, the high resistance water absorption of the close void cell structure of XPS insulation is highly appreciated.

Decks and roofs 

The protected roof consists of the waterproofing membrane installed on the roof deck, the insulation and ballast installed atop the insulation. This system protects the roof or deck from environmental exposures and physical damage. For such applications, the moisture-resistive properties of XPS often make it a suitable choice. It is also used in vegetative roofs and decks. The thermal mass effect provided by the vegetative roof saves energy and provides reduced heating and cooling costs. It also extends useful life of the roof due to reduced exposure to harmful ultraviolet light and weather. A vegetative roof reduces heat flow into a building, lowering air-conditioning costs. Long-term exposure to moisture makes it imperative the insulation retains its R-value, possesses adequate compressive strength, and provides resistance to water absorption. XPS is almost exclusively used to insulate such vegetative roofs.

Below-grade

The continuous insulation around the exterior is the most efficient way to insulate a building foundation. As precipitation eventually finds its way to the foundation,  the moisture resistance is very important. Insulation used in the foundations must also withstand significant abuse during the backfilling. Foundation insulation must have superior durability and be able to withstand the soil’s lateral compressive forces. Construction experience has shown that XPS insulation to provide superior performance in the exterior foundation application.



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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

£55.16 (£66.19 inc VAT)

£5.25/m2 (£6.30/m2 inc VAT)

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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..

£55.16 (£66.19 inc VAT)

£5.25/m2 (£6.30/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

£66.41 (£79.69 inc VAT)

£11.07/m2 (£13.28/m2 inc VAT)

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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..

£66.41 (£79.69 inc VAT)

£11.07/m2 (£13.28/m2 inc VAT)

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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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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)

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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)

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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  show quantity discountsDelivery Time: 2 - 4 days

Guide Price: £16.72 (£20.06 inc VAT)

£11.15/m2 (£13.38/m2 inc VAT)

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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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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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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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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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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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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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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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4mm Marmox Multiboard Waterproof Insulation Board  (pack of 10)

4mm Marmox Multiboard Waterproof Insulation Board (pack of 10)

1250x600mm - 7.50m2  show quantity discountsDelivery Time: 2 - 4 days

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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..

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Marmox Thermoblock 100mm (box of 18)

Marmox Thermoblock 100mm (box of 18)

Thermoblock 100mm  show quantity discountsDelivery Time: 2 - 4 days

£164.60 (£197.52 inc VAT)

£152.41/m2 (£182.89/m2 inc VAT)

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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 bricks and..

£164.60 (£197.52 inc VAT)

£152.41/m2 (£182.89/m2 inc VAT)

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