RAL quality mark advantages – Calls for tender – Bark mulch
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:
Bark mulch carrying the ”Substrates for Plants” quality mark RAL GZ 250/1-1, particle size (as alternatives): fine / medium / coarse
Mulch material from shredded and fractionated (coniferous) bark to protect the vegetation and the top soil.
A layer of bark mulch must be applied to the entire planting area or tree pit surface at a uniform thickness of … cm.
The supplier must provide evidence that the production facility from which the product was delivered carries the ”Substrates for Plants” quality mark RAL GZ 250/1-1 (bark mulch).
