RBC is seeking a Contractor to undertake the refurbishment of existing concrete flat roofs with Alwitra single ply systems . The successful supplier has to be on the approved installers’ list of ICB Waterproofing Ltd for Alwitra products. This invitation to tender (ITT) has been completed by the Procurement department of the RBC in collaboration with the Job Responsible Engineers (JREs) and sets out how your organisation can submit a tender.