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.

It is sometimes known as EIFS (Exterior Insulation Finish System) in North America. 

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 blocks of flats.

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 loss.1

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 without inhabitants having to move out



Calculator and savings

ROCKWOOL external thermal insulation systems can offer different products such as slabs (mono or dual densities) and lamella, in a range of thicknesses. In some markets, we also offer the whole ETICS system known as REDArt.

The thickness of insulation applied to an external insulation system will depend on local regulations and requirements. Additional factors such as the size of the wall being insulated, its base characteristic and finish will all affect the exact cost of installation.

Technical support is commonly available from your local ROCKWOOL organisation to work out the precise products and thicknesses required. Certain tools may also be available to help work out the current thermal performance of your walls.

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

Sustainability and energy efficiency

Stone wool can be recycled again and again without degrading its quality5. To support sustainable choices, ROCKWOOL products provide Environmental Product Declarations (EPDs) in more than 20 markets.

ROCKWOOL products used in external wall insulation systems reduce heating fluctuations and improve the thermal comfort of any building – helping work towards LEED, passive house6, BREEAM standards7 and other sustainable building rating schemes.


wooden tower - Ri-Legno - ETICS

Financial support

Tax incentives and schemes encouraging building renovations to improve energy efficiency may be available where you are. Contact your local offices for more information.

Energy Efficiency, Key, Keyboard, Button


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