Penetron Crystalline Technology Digs Deep for Serbia’s Delta Real Estate HQ Share Article Completed in March 2021, the new Delta Real Estate HQ in Belgrade, Serbia required a lengthy excavation for the underground parking garage. Penetron Hellas delivered a comprehensive concrete waterproofing solution by applying the breadth of the Penetron System. An LEED certified office tower: The $50-million, 11-floor Delta Real Estate building features 11,514m2 of office space and parking for 188 cars. The continued success and confidence in Penetron’s products – and our technical support services...