External Thermal Insulation Composite System – or ETICS – is a compact multilayer insulation solution designed to improve the energy efficiency of both new and existing buildings.

This external wall insulation system is made from many layers, including a base coat, reinforced mesh and finishing coat. Continuous external insulation improves thermal performance and reduces thermal bridges, storing heat in the walls to create a more comfortable living environment.

The types of materials used can vary between systems, making it flexible to fit different building structures and designs. This makes it a popular choice if you are looking to renovate existing buildings.

ETICs Products

Why do we need ETICS?

A building’s façade is normally the largest surface area between its internal and external environment – where a great amount of heat loss can occur. Thermal insulation of the external walls from the outside is an efficient way of protecting against thermal energy loss1.

ETICS works to insulate the vertical envelope of a building – whether an individual detached house or entire apartment block. This prevents temperature load, weather related damage and condensation problems.


Key benefits include:

  • Preventing heat loss by reducing thermal bridging
  • Improving energy efficiency of an entire building
  • Low cost solution to upgrading existing properties
  • Installation with minimal disruption to occupants

Calculator and savings

ROCKWOOL external thermal insulation systems offer slab products as mono or dual densities and in a range of thicknesses.  

Factors such as the size of the wall being insulated, its base characteristic and finish will all affect the exact cost of installation.

Use our ROCKWOOL U-value calculator to determine the thermal performance of the building’s walls, and possible cost savings.

reference project Grand Park Hotel Rovinj, Croatia, roof, facade, ETICS
With its smart fibre structure, ROCKWOOL stone wool adapts to irregularities, preventing sagging or gaps in the insulation layer. This helps keep warmth or cooler air in, thereby preserving thermal comfort.

Erica Bazzini

ROCKWOOL Group Product Manager

Case Studies

The challenge

Bethesda Children’s Hospital in Budapest founded the Mother’s House – designed to provide beds and living facilities for mothers whose children face the prospect of long-term hospitalisation. Involving renovation and extension to its existing building, this required low operating costs and comfortable living conditions. 

The solution

Frontrock was used to insulate the external walls. This two-layer stone wool board was applied to the external façade.

The results

Hundreds of mothers can now stay close to their children each year. Installation of Frontrock has improved thermal insulation, lowering energy costs and creating a comfortable internal climate.

High levels of fire resilience and sound insulation have also helped make Mother’s House a safe and quiet environment. In addition, Frontrock prevents mould and bacteria forming – maintaining the hospital’s high hygiene standards.

Case Study, Bethesda Hospital
We are proud that our products were chosen for the renovation of Mother’s House. It’s a really positive use of ROCKWOOL stone wool.

Kornél Bányai

Country Sales Manager, ROCKWOOL Hungary
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Why stone wool?

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EWI Slab Datasheet

To be updated
2.3 MB

Steel Frame Slab Datasheet

To be updated
3.1 MB

Timber Frame Slab Datasheet

Download our EWI System Holders Guide

Financial support

The UK government has announced that it will be providing a fund for the removal and replacement of unsafe cladding systems. Read more.

Energy Efficiency, Key, Keyboard, Button


What is ETICS?
How do I insulate my facade made out of bricks?
Where are ETICS used?