STRIKOTHERM External Wall Insulation

The Strikotherm EWI (External Wall Insulation) System offers high thermal efficiency and a durable, long lasting finish. Combining expanded polystyrene and mineral fibre insulation boards to achieve a design u-value through the wall is a cost effective and proven modern method of construction.

The Strikotherm System has BBA Certification for up to 30 years design life, incorporating wind loadings, fire resistance, impact resistance and condensation characteristics.

The Strikotherm system is particularly suited to the current measures under the Community Energy Savings Programme (CESP) along with the Carbon Emissions Reduction Target (CERT), which forms part of the national obligation to reduce our carbon footprint. SAS are also working in anticipation of The Green Deal, due to commence in 2012.

Strikotherm EWI Overview

External Wall Insulation System

  • Strikotherm Adhesive Basecoat
  • Insulation
  • Strikotherm Mesh Basecoat
  • Reinforcing Mesh 
  • Strikotherm Mesh Basecoat
  • Decorative Render

Features & Benefits

  • BBA certified; "EPS + mineral fibre insulates"
  • OFGEM approved system- can be used for any CESP/CERT/ECO/Green Deal schemes
  • Grant funding via CERT, CESP, ECO + Green Deal
  • 30 year product durability
  • Thermal efficiency- achieve u-values down to 0.15 W/m2K
  • Suitable for new build and refurbishment projects

Ideal Substrates

  • Masonry
  • Timber
  • Concrete
  • Existing Render

Fixing Systems

  • Adhesive system
  • Rail system

Strikotherm EWI can be fitted as adhesive or mechanical systems as defined by ETAG 004.

Strikotherm adhesive EWI uses a range of adhesive basecoat, subject to substrate type and specification, to fix insulation panels to the walls also using secondary mechanical fixings. Follow this link to view CAD details of system construction from DPC to render finish.

EWI can also be fitted using a mechanical only rail system available as part of the ProRend EWI range. The system does not use any supplementery adhesive. CAD details of this construction method are found under this link.

A comparison of the 2 Strikotherm fixing systems are summerised below.

Adhesive vs Rail




Insulation dimensions

1000 x 500mm

500 x 500mm

Mineral Wool Insulation

ProRend EIFS Rasp

ProRend EIFS Rasp

Expanded Polystyrene Insulation

ProRend EIFS Rasp

ProRend EIFS Rasp

Fire barrier

Mineral Wool Lamella - only where primary insulant is EPS

Mineral Wool Rail Slab with Stainless Steel rails and intumescent strip



ProRend EIFS Rasp

Fixing method

ProRend Lite adhesive with secondary mechanical fixings

PVCu rails fixed at each edge of the insulation panel

Uneven substrates

Requires dubbing out of installed insulation


Curved walls

ProRend EIFS Rasp - using Mineral Wool Lamella


Specification Service

The specification and design process for Strikotherm EWI will involve:

  • U value calculations
  • CAD details
  • Full written specification, technical and material safety datasheets
  • Fixing performance testing
  • Wind load engineering calculations
  • System samples
Related Developments
  • Strikotherm BBA