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Retrofit insulation standards are established as follows:

  • Specific requirements under Scottish Government initiatives such as Warmer Homes Scotland and the Home Energy Scotland grants and loans require installers to be registered with TrustMark for the relevant trade.
  • Product CE Marking/hEN’s and ETAs and associated manufacturers guidance.
  • Requirements under independent certification schemes, such as system specific Agrément Certificates, may specify the scope of use and set out installation and training requirements.