External Wall Insulation

What is EWI

External Wall Insulation (EWI) Systems involve applying an insulating layer to the outside of a building, then finishing it with a decorative render.

EWI improves thermal performance, reduces energy bills, and gives tired façade a fresh, durable finish.



What are ICF solutions?

Insulated Concrete Formwork (ICF) is a method where hollow EPS blocks/panels are stacked and filled with concrete to form a structural wall with integrated insulation.

Finishing ICF walls with a dedicated Kilsaran system ensures proper bonding, weather protection, breathability, and a clean, consistent finish.

Finish types typically include thin coat renders, dry dash systems and brick slips.



1. ICF Outer Wall – Expanded Polystyrene
2. Reinforcing Coat – Ceresit CT80, CT85, CT87 (3mm)
3. Reinforcing Mesh – Ceresit CT325
4. Reinforcing Coat – Ceresit CT80, CT85, CT87 (1mm)
5. Primer (if required) Ceresit CT16 – No primer required
with CT87 and light render colour
6. Ceresit CT74 Silicone (1.5mm) and Ceresit CT174 Silicate -Silicone (1.5mm)