Alterna Slate is a flat rectangular or diamond shaped slate with straight edges ideally used for high quality roofing, facades, bay windows, vertical cladding etc. The range of sizes and colours, various installation methods and its easy workability offers scope for a diversity of architectural requirements.


Eternit Belgium's Alterna Slate is a flat either rectangular, with champerred corners or diamond-shaped slate with straight edges.


Alterna Slates are ideal for high quality covering of roofs and facades, both on new and refurbishment projects. The wide range on offer, the various slating methods and the remarkable workability of the slate allows for a diversity of architectural requirements.


  • Final coat with moss-resisting agent
  • Base layer
  • "Strewcoat layer" with moss-resisting agent
  • Basic Material
  • Backcoat
  • Edge finish


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