Swisrail EWI: NHBC  


  • An NHBC compliant, fully warranted system with an effective life in excess of 30 years
  • The Swisrail system incorporates a drained cavity via a support frame to give full NHBC compliance. A cavity is provided to prevent moisture penetrating to the underlying structure
  • The system is fully weather resistant whilst remaining vapour permeable and allows the fabric of the building to act as a heat store, increasing thermal efficiency
  • Swisrail eliminates cold bridging, condensation and mould growth and protects the structural fabric of the building and is resistant to impact damage. It is rated Class 0 for surface spread of flame and contributes to sound reduction within the external wall construction


  • Primarily suited to new-build construction types - NHBC compliant, tailored to lightweight frame construction
  • Buildings up to 6 Storeys – suited for unrestricted use; High Rise - suitable subject to Alumasc’s high rise policy


  • A choice of insulation thicknesses and materials are available, achieving very low U-values
  • Vertical steel support rails provide a 25mm gap between insulation and structure
  • Swisrail insulation options include Mineral Wool, Expanded Polystyrene 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

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