Expanded Polystyrene Insulation EPS

Rigid expanded polystyrene (EPS) panels can be used as insulation for walls, roofs and heavy building foundations for any kind of structure or exterior finish. EPS is a light, rigid material which is easy to handle. It is considered to be permanent insulation, because it provides long-lasting energy efficiency which doesn't diminish over time, Of all the types of rigid insulation on the market, EPS stands out through its excellent cost/R-value ratio. It is perfect for residential, commercial, car park and cold storage usages. EPS insulation is used in the construction of buildings to insulate roofs, walls, floors or foundations. Expanded polystyrene is also used as the insulation component in energy-efficient building systems: Insulating Concrete Forming (ICF) system and Structural Insulating Panel (SIP) system. 


EPS is widely used as the main insulating component of the External Wall Insulation (EWI) system. EPS is also used for solutions for geotechnical engineered applications such as heave protection, compressible fill materials used between concrete structures and expansive soils.

EPS is manufactured by expanding spherical beads in a mould, using heat and pressure to fuse the beads together. EPS is a closed cell, rigid foam plastic insulation that does not contain a blowing agent. The raw material is heated in special machines called pre-expanders with steam at temperatures of between 80-100C. 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. 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.

EPS insulation applied as continuous insulation over foundations, walls and roofs eliminates thermal bridging, increasing the total effective R-value and reduces energy costs and increases your energy savings. EPS is inert to a wide range of chemicals. It has no food value and will not support the growth of insects, parasites or plant life. The closed cell structure assures constant thermal performance and excellent resistance to moisture absorption. 

Types of Expanded Polystyrene EPS
  • White Polystyrene,
  • Grey (Graphite) Polystyrene 

White Polystyrene

White polystyrene is what you see in day to day applications. The white colour comes from the pellets used in creation of the expanded polystyrene blocks, which are later cut to sheets of different thicknesses. Some manufacturers would artificially colour their products to differentiate them from others.

Grey (Graphite) Polystyrene

The Grey polystyrene gets its colour from the graphite particles included in it in manufacturing process. The high-purity graphite particles integrated within the insulation beads reflects radiant heat and significantly improves insulation capability, providing up to 20% greater r-value than traditional white EPS of the same thickness. As radiant heat moves through graphite insulation, it reflects it hundreds of times, significantly slowing down the transfer of heat and making it more energy efficient. Warm air always moves towards cold air, but in Grey Polystyrene (Graphite) boards. that path takes many twists and turns along the way, slowing down the heat transfer, keeping the premises warmer. 

Benefits
  • Cost effective - cheapest insulation material in the market. 
  • Easy to cut using a fine tooth saw or hot wire cutter,
  • The surface can be rasped on site to remove level differences,
  • Durable, not affected by short exposure to UV or rain.
  • Long term exposure can cause slight discolouration, but does not affect the thermal performance,
  • Has a high K-value when compared with other insulations,
  • Can be used in low rise and high Rise applications and in coastal locations,
  • Does not absorb moisture and its thermal and mechanical properties are unaffected by damp, humidity or moisture,
  • 100% recyclable.
Precautions
  • Should be kept away from solvents, 
  • Should not be exposed to naked flame,
  • Classified as combustible (combustibility is limited due to retardants present),
  • Should be stored in protected packaging and away from direct sunlight.
Application
  • New and existing rendered or unrendered masonry,
  • Timber backed walls, floors and roofs,  
  • Cavity wall construction,
  • External wall insulation systems.
Installation
  • The boards are initially fixed to the substrate (masonry or timber) either by a mortar/adhesive or simply by mechanical fixings, or with adhesive as well as mechanical fixings.
  • Then the boards should be covered with an outer layer, siding or by a mortar layer.
  • The outer surface of the board needs to be rasped or sanded down to produce an abrasive surface, before covering it with the fibre mesh, to which the base coat or mortar layer would be applied.


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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: 3 - 5 days

£29.99 (£35.99 inc VAT)

£1.00/m2 (£1.20/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..

£29.99 (£35.99 inc VAT)

£1.00/m2 (£1.20/m2 inc VAT)

= m2
other thicknesses
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: 3 - 5 days

Guide Price: £25.00 (£30.00 inc VAT)

£0.83/m2 (£1.00/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..

Guide Price: £25.00 (£30.00 inc VAT)

£0.83/m2 (£1.00/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
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

£58.72 (£70.46 inc VAT)

£1.70/m2 (£2.04/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 achiev..

£58.72 (£70.46 inc VAT)

£1.70/m2 (£2.04/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
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

£62.88 (£75.46 inc VAT)

£1.82/m2 (£2.18/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..

£62.88 (£75.46 inc VAT)

£1.82/m2 (£2.18/m2 inc VAT)

show quantity discounts
= m2
other thicknesses
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: £177.20 (£212.64 inc VAT)

£5.13/m2 (£6.16/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: £177.20 (£212.64 inc VAT)

£5.13/m2 (£6.16/m2 inc VAT)

= m2
other thicknesses
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..

= m2
other thicknesses
EWI-210 EPS Adhesive - 25kg bag

EWI-210 EPS Adhesive - 25kg bag

25kg  Delivery Time: 2 - 3 days

£7.66 (£9.19 inc VAT)

£1.53/m2 (£1.84/m2 inc VAT)

EWI-210 is an adhesive used for fixing polystyrene panels (EPS) to exterior surfaces of buildings, such as concrete, light-aggregate and cellular concrete, ceramic or silicate surfaces. This adhesive can be used on untreated, plastered, painted or on textured external surfaces. EWI-210 is composed o..

£7.66 (£9.19 inc VAT)

£1.53/m2 (£1.84/m2 inc VAT)

= m2
EWI-220 EPS Basecoat - 25kg bag

EWI-220 EPS Basecoat - 25kg bag

25kg  Delivery Time: 2 - 3 days

£8.92 (£10.70 inc VAT)

£1.78/m2 (£2.14/m2 inc VAT)

EWI-220 Basecoat is  specially designed to fix fibreglass mesh reinforced layer for EPS thermal insulation systems. It can also be used for fixing EPS panels to substrates, such as such as concrete, light-aggregate and cellular concrete, ceramic or silicate surfaces. It can be used in fix EPS p..

£8.92 (£10.70 inc VAT)

£1.78/m2 (£2.14/m2 inc VAT)

= m2
EWI-221 Winter Adhesive - 25kg bag

EWI-221 Winter Adhesive - 25kg bag

25kg  Delivery Time: 2 - 3 days

£9.71 (£11.65 inc VAT)

£1.94/m2 (£2.33/m2 inc VAT)

EWI-221 is a winter adhesive that would allow you to work in temperatures as low as zero degrees. It is used to mount EPS boards on to external surfaces and also to fix the reinforcement layer on those boards. Once mixed with clean water it becomes a homogeneous grey adhesive putty. It has excellent..

£9.71 (£11.65 inc VAT)

£1.94/m2 (£2.33/m2 inc VAT)

= m2
EWI-225 Premium Adhesive - 25kg bag

EWI-225 Premium Adhesive - 25kg bag

25kg  Delivery Time: 2 - 3 days

£12.47 (£14.96 inc VAT)

£2.49/m2 (£2.99/m2 inc VAT)

EWI-225 Premium is a very strong and most flexible adhesive used to fix polystyrene and mineral wool panels and also to embed reinforced mesh. It consists of mineral binders, synthetic fibres, mineral fillers and modifying admixtures. It is used in render-only systems as a basecoat, where it elimina..

£12.47 (£14.96 inc VAT)

£2.49/m2 (£2.99/m2 inc VAT)

= m2
EWI-240 EPS Foam Adhesive - 750ml

EWI-240 EPS Foam Adhesive - 750ml

750ml  Delivery Time: 2 - 3 days

EWI-240 EPS Foam Adhesive is an easy to apply, quick drying, strong polyurethane foam fixing expanded polystyrene (EPS) boards to a substrate or to fill in gaps between boards. It can be used on a variety of substrates, such as concrete, bricks, ceramic blocks, new plaster, wood, metal, roof felting..

= m2
EWI-269 Lightweight Basecoat- 25kg bag

EWI-269 Lightweight Basecoat- 25kg bag

25kg  Delivery Time: 2 - 3 days

£8.43 (£10.12 inc VAT)

£1.69/m2 (£2.03/m2 inc VAT)

EWI-269 Lightweight Basecoat is a breathable and flexible levelling adhesive that can be used internally or externally on lightweight masonry structures and stonework. It consists of grey Portland cement, hydrated lime and perlite, and has a declared thermal efficiency of 0.47W/mK. This basecoat can..

£8.43 (£10.12 inc VAT)

£1.69/m2 (£2.03/m2 inc VAT)

= m2
EWI-301 Water Based Primer - 5L

EWI-301 Water Based Primer - 5L

5L  Delivery Time: 2 - 3 days

£11.37 (£13.64 inc VAT)

£0.71/m2 (£0.85/m2 inc VAT)

EWI-301 Water Based Primer is deep penetrating primer used to prepare walls before installing external wall insulation or render-only systems. EWI-301 limits the absorptive capacity of substrates and also strengthen and stabilise dusty substrates. It helps to enhance adhesion external wall insulatio..

£11.37 (£13.64 inc VAT)

£0.71/m2 (£0.85/m2 inc VAT)

= m2
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