Product quality is a top priority for Van Leeuwen, so we require our suppliers to maintain strict standards. We carefully research suppliers by means of mill visits and questionnaires. All of our suppliers must also hold an ISO 9001 certificate. Only then are they added to our Approved Manufacturers List.

We also impose our own purchasing specifications on the stock we order, to take into account market requirements and developments in production standards. These specifications are used by all our branches in each region, which enables us to assure our customers of consistent quality.