Menu
Your Cart

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.

CHOOSE MANUFACTURERS

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: 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
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: 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: 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..
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: 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..
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: 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 ..
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: 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: 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: 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..
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..
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
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: 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..
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..
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 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 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
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 - 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: 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: 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..
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..
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: Polyfoam XPS Model and Size: 100m x 1.5m - 150m2
Delivery Time: 5 - 7 days
Polyfoam Slimline Zero Membrane - 1.5m x 100m is a high performance, thermally bonded tri-laminate of polypropylene waterproofing membrane  to be used over flat roof, inverted roofs and green roofs, to reduce the amount of rain water flowing between the insulation and the waterproofing mem..
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
Showing 1 to 30 of 57 (2 Pages)