Swistherm EWI - New Build


Swistherm - The first choice EWI system for new build applications


  • Swistherm is a BBA approved external wall insulation system designed to increase a building's thermal efficiency.
  • The structural fabric of the building is protected, high resistance to impact damage is provided and the system is completely weather resistant whilst remaining vapour permeable.
  • Swistherm has an effective life of over 30 years and is rated Class 0 for surface spread of flame
  • Warranties are available when the system is installed in accordance with Alumasc's project specification and Swistherm having been applied by an Alumasc registered contractor
  • Swistherm eradicates cold bridging, condensation and mould growth and limits movement and thermal shock and freeze-thaw cycles associated with traditional brickwork facades  


  • Swistherm is primarily suited to new-build construction types where the structure provides continuous support for the insulation slabs however it can also be used on refurbishment schemes. 
  • Unrestricted use applies to buildings up to 6 Storeys however the system is also ideal for high rise buildings, 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.


  • Render finishes include textured ST Silkolitt Silicone Render and ST Mineral Render which are available in a wide range of colours.
  • Alumasc Acrylic Brick Slips can also be used with Swistherm.


  • ST Silkolitt Silicone Render

    ST Silkolitt Silicone Render
  • ST Mineral Render K

    ST Mineral Render K
  • Acrylic Brick Slips

    Acrylic Brick Slips
  • ST Silicone Paint

    ST Silicone Paint

Featured Project

Ravenscraig Flats - 2014Ravenscraig Flats - 2014

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