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Stylite EWI boards are suitable for use with all external wall applications, both domestic and commercial to satisfy the current Building Regulations. The external wall insulation is a quick and effective way to increase the thermal performance of any building and can be applied with almost any render or cladding system to produce a full External Wall Insulation (EWI) system. Often used to upgrade existing buildings with retrofit solutions, but are also used for new-builds.

Expanded polystyrene is compatible with most chemicals and materials. It is rot proof and durable, and will remain effective as an insulation for the life of the construction; it is not affected by bacteria, moulds or fungi and will not provide nutrient value for insects or vermin.

Features and benefits:

  • Lambda from 0.030 W/m·K.
  • Straight edge profile.
  • Lightweight and applicable to any wall substrate.
  • Quick and easy installation.
  • Minimal water absorption and permeability.
  • 100% recyclable.
  • No HFC’s, CFC’s or HCFC’s.
  • Global Warming Potential (GWP) and an Ozone Depletion Potential (ODP) of zero.
  • BRE green guide rating: A+.
  • CE marked.

Related literature

The following content references this product:

Standard product features

Size (l x w):

1200 x 600 mm.

Compressive strength:

- At 10% to EN 826:

  • SD-VB-FRA: 70 kPa.
  • Plustherm: 100 kPa.

- At 1% to EN 13163:

  • SD-VB-FRA: 21 kPa.
  • Plustherm: 30 kPa.

Tensile strength to EN 1607:

  • SD-VB-FRA: TR100.
  • Plustherm: TR150.

Thermal conductivity (Lambda 90/90) to EN 13163:

  • SD-VB-FRA: 0.038 W/m·K.
  • Plustherm: 0.030 W/m·K.

Reaction to fire to EN 13051-1:

Euro class E.

Bending strength to EN 12089:

  • SD-VB-FRA: 115 kPa.
  • Plustherm: 150 kPa.

Water absorption to EN 13163:

  • SD-VB-FRA: 0.015–0.030 (mg Pa-1 h-1 m-1).
  • Plustherm: 0.009–0.020 (mg Pa-1 h-1 m-1).

Dimensional stability to EN 1603:

DS (N) 5.



More grades available upon request; consult manufacturer for details.

NBS Specification

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This product is associated with the following NBS Create clause:
45-45-65/380 Expanded polystyrene (EPS) board

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Styrene Packaging & Insulation


+44 (0)1274 691777

Product reference

External Wall Insulation




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Manufacturer details

Morley Carr Road,
Low Moor,
West Yorkshire, BD12 0RA
Tel +44 (0)1274 691777
Fax +44 (0)1274 693832
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