Swistherm EWI: New Build  


  • A BBA approved, fully warranted system with an effective life in excess of 30 years
  • Swistherm is fully weather resistant whilst remaining vapour permeable and allows the fabric of the building to act as a heat store, increasing thermal efficiency
  • The system eliminates cold bridging, condensation and mould growth and protects the structural fabric, limiting movement and thermal shock and freeze-thaw cycles associated with traditional brickwork façades
  • The Swistherm EWI system is highly resistant to impact damage, is rated Class 0 for surface spread of flame and contributes to sound reduction within the external wall construction


  • Construction Types – primarily suited to new-build construction types where the structure provides continuous support for the insulation slabs
  • Buildings up to 6 Storeys – suited for unrestricted use; High Rise - suitable subject to Alumasc’s high rise policy


  • Insulation slabs are mechanically fixed direct to a continuous substrate. A choice of insulation thicknesses and materials are available, achieving very low U-values
  • Swistherm insulation options include Mineral Wool, Expanded Polystyrene, Grey EPS and Cork.

Renders, Finishes & Brick Slips

  • Render finishes include ST Silkolitt Silicone Render and ST Mineral K Mineral Render, available with a rolled surface texture, in a wide range of colours.
    Brick slip options include Alumasc Acrylic Brick Slips.

Installation & Maintenance

  • Swistherm is installed by a national network of Alumasc registered specialist contractors
  • The system requires minimal routine maintenance

Send us an enquiry