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Extruded Polystyrene Insulation XPS

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,
  • Wont 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 120C 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 materials 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 materials 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 soils 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)
Guide Price
Brand: Kingspan Model and Size: N300R 30mm - 10.50m2
Delivery Time: 3 - 5 days
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..
Guide Price: £75.00
£90.00 inc VAT
50mm Kingspan Styrozone N500R XPS Board (pack of 8)
Guide Price
Brand: Kingspan Model and Size: 1250x600mm - 6m2
Delivery Time: 2 - 3 days
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..
30mm FLOORMATE 300A Styrofoam XPS - Extruded Polystyrene Floor Insulation Board
Guide Price
Brand: Dow Chemicals Model and Size: 1200 x 600mm -0.72m2
Delivery Time: Out Of Stock
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
30mm Sundolitt XPS300 Extruded Polystyrene Board (pack of 14) 30mm Sundolitt XPS300 Extruded Polystyrene Board (pack of 14)
Guide Price
Brand: Sundolitt Model and Size: 1200x600mm - 10.08m2
Delivery Time: 2 - 3 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
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: £248.05
£297.66 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..
50mm Polyfoam XPS Floorboard - Super grade - Extruded Polystyrene Board (pack of 8)
Guide Price
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..
25mm Yelofoam X2i Cellecta
Guide Price
Brand: Cellecta Model and Size: 2500x600mm - 1.5m2
Delivery Time: 2 - 4 days
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: £17.72
£21.26 inc VAT
40mm Cellecta Hexatherm XFLOOR 300 Thermal Floor Insulation Board
Guide Price
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 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..
30mm Cellecta Hexatherm XPeri Perimeter Wall Insulation Board 30mm Cellecta Hexatherm XPeri Perimeter Wall Insulation Board
Guide Price
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 50mm Cellecta Hexatherm XDRAiN Drainage Channel Inverted Roof Board
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 ..
50mm Cellecta Hexatherm XPOOL Swimming Pool XPS Insulation Board 50mm Cellecta Hexatherm XPOOL Swimming Pool XPS Insulation Board
Guide Price
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 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..
38mm Cellecta Hexatherm XCHiP Thermal Laminate Chipboard
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..
26mm Cellecta Hexatherm XCPL High Impact Faced Thermal Laminate Board for Car Park Soffits
Guide Price
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 ..
62mm Cellecta Hexatherm XPLY Plywood Thermal Laminate Roof Board
Guide Price
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
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 ..
42.5mm Knauf Polyfoam Linerboard - 30mm Extruded Polystyrene (XPS) + 12.5mm Plasterboard
Guide Price
Brand: Knauf Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 5 - 7 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..
Brand: Marmox Model and Size: 1250x600mm - 7.50m2 -Free Delivery
Delivery Time: 2 - 3 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..
£159.30
£191.16 inc VAT
Model and Size: 100mm - Free Delivery
Delivery Time: 2 - 3 days
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..
£233.75
£280.50 inc VAT
100mm Cellecta Unicloser X Double Flange Cavity Closer - 2.5m length
Guide Price
Brand: Cellecta Model and Size: 100mm - 2.5m
Delivery Time: 3 - 5 days
100mm 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 ..
17.5mm Polyfoam XPS Laminating Board - (pallet of 68) - 1200mm x 2400mm
Guide Price
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..
20mm Cellecta Hexatherm XR Roughened Planed  XPS Insulation Board - pack of 20
Guide Price
Brand: Cellecta Model and Size: 600x1250mm - 15m2
Delivery Time: 2 - 4 days
20mm Cellecta Hexatherm XR is a specially designed closed cell extruded polystyrene board, ideal for for both internal and external wall applications for covering with plaster or render. The board's high comprehensive strength allows it to withstand withstand heavy point loads. The board is com..
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 ..
23mm Polyfoam XPS Laminating Board - (pallet of 52) - 1220mm x 3000mm
Guide Price
Brand: Polyfoam XPS Model and Size: 1220x3000mm - 190.32m2
Delivery Time: 5 - 7 days
23mm 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 ..
25mm Polyfoam XPS Laminating Board - (pallet of 48) - 1220mm x 3000mm
Guide Price
Brand: Polyfoam XPS Model and Size: 1220x3000mm - 175.68m2
Delivery Time: 5 - 7 days
25mm 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 ..
27mm Polyfoam XPS Laminating Board - (pallet of 44) - 1220mm x 3000mm
Guide Price
Brand: Polyfoam XPS Model and Size: 1220x3000mm - 161.04m2
Delivery Time: 5 - 7 days
27mm 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 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 custom..
Guide Price: £102.21
£122.65 inc VAT
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