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EPS Insulation Grey – 50mm (1m²)

5.00 out of 5 based on 1 customer rating
(1 customer review)
£5.09 (incl VAT)

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Expanded polystyrene EPS board is a high-performing thermal insulation at the centre of our external wall insulation systems. It upgrades the thermal properties of a building, improving U-values, reducing the risk of water penetration and condensation. EPS boards can be used on timber, masonry and system-built properties as well as for tile hanging and a wide range of rendering systems. It is designed to be applied externally to masonry or timber-backed walls, either by mechanical fixing with supplementary adhesive or just by mechanical fixings. EPS boards can also be installed in the cavity void, if the property is being insulated using cavity wall insulation.

The boards are available in various thicknesses (20mm, 50mm, 70mm, 90mm and 100mm), stocked depending on your requirements.

  • Great value
  • East to work with
  • Lightweight but durable
  • Dense material – low thermal conductivity
  • Low moisture absorption
  • Non-degrading
  • Available in 10mm increments

Intended Uses:

The product is designed to be applied externally to masonry or timber-backed walls, either by mechanical fixing with supplementary adhesive or just by mechanical fixings.

Technical Specifications:

Composition: expanded polysterene, graphite

Thermal Conductivity: 0.032W/(m2K)

Reaction to Fire: Class E

Size of boards: 1200mm by 600mm

Thickness available: 20mm, 50mm, 70mm, 100mm

Coverage in pack: 1m2

Bending strength: >= 75kPa


Use netting on scaffolding to reduce the amount of polystyrene blowing about in the wind.

Try to use a hot knife or hot wire cutters to minimise the amount of polystyrene offcuts, although a standard saw can be used – ideally, cut the boards within a covered area to reduce offcuts blowing around.


EPS insulation boards should be installed in accordance with the manufacturer’s installation guidelines – these should cover design and all aspects of the application of the insulation. The boards are initially fixed to the substrate (masonry or timber) either by a mortar/adhesive or simply by mechanical fixings.

After having been fixed to an external wall, the EPS boards should be covered with an outer layer, either by the mortar basecoat or simply by a netting covering to protect from exsessive heat, moisture and UV exposure.

Before applying the basecoat or mortar for the fibre glass mesh, the top surface of the EPS board needs to be rasped or sanded down to produce an abrasive surface. Once this has been done, the substrate is ready for the application of the fibre glass mesh.


Use an industrial hoover to clean-up the polystyrene bits.


Stacked by stacking boards – coverage depends on board thickness

100mm board – coverage 1m2


Shelf life: please see the manufacturer’s date of expiry. Keep in a dry place, in the original packaging. Avoid excess heat or UV light exposure.

Safety Measures:

Wear eye protection, gloves and a mask. Take extra caution when using cutting equipment.

Compliance with Standards:

The product complies with the harmonized standard EN 13163:2012 and A1:2015

SKU: EWI-410-50
Weight 25 kg

1 review for EPS Insulation Grey – 50mm (1m²)

5.00 out of 5
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  1. Rated 5 out of 5

    Very good quality EPS insulation. Also great the fact you can buy small quantities. We only need 8m2 for one wall of an extension. The boards that come are 60cm x 120cm so they actually sent 12 boards, so we actually got 8.64m2.

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