External Wall Insulation
External Wall Insulation
Knauf Insulation EWI Rock Mineral Wool


External wall insulation involves the installation of an insulating layer to the external fabric of an existing or new building and is usually finished with a render coat.

Important issues when specifying an external wall insulation solution include the level of thermal performance to be achieved, which finish is the most suitable and the reaction to fire classification of the insulation.

Our Rock Mineral Wool insulation for external wall provides thermal and acoustic performance as well as being non-combustible.


Recommended Product


  • Mineral Wool provides the best combination of thermal, fire safety and acoustic performance.

  • Using a breathable Mineral Wool solution allows moisture vapour to pass through the construction to outside, removing the risk of condensation.

Download our Solutions Guide U-value Tables

For any U-value calculations for alternative construction build-ups, please contact our Technical Support Team on 01744 766666.

For written U-value calculations, please complete our contact form by clicking here, including details of your full through construction build-up and we will respond accordingly to meet your requirements.