Proof of RAL quality assurance for bulk/unpackaged shipments

 

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Proof of RAL quality assurance for bulk/unpackaged shipments

Substrates for green roofs

RAL quality mark advantages – Calls for tender – Substrates for green roofs

If you want to make sure bidders actually offer RAL-certified products, you should choose to use the following wording in your invitations for tender:

Tips for tendering – RAL-certified substrates for green roofs

Substrate type:

  • Substrate for multi-layer intensive green roofs carrying the quality mark RAL GZ 250/6-1
  • Substrate for multi-layer extensive green roofs carrying the quality mark RAL GZ 250/6-2
  • Substrate for single-layer intensive green roofs carrying the quality mark RAL GZ 250/6-3
  • Substrate for single-layer extensive green roofs carrying the quality mark RAL GZ 250/6-4
  • Granular drainage material carrying the quality mark RAL GZ 250/6-5

The supplier must provide evidence of the relevant quality mark RAL GZ 250/6.