We strongly appreciate the foundation of the international metalworking association. Especially in the past years, the plumbing trade has brought to proof that its roof and facade designing competence is not only sought for in its own country. Remarkable buildings bear witness to excellent qualifications of German plumbers and metal sheet workers worldwide. The demands on maximum energy-efficiency and saving will significantly determine modern building constructions in future. For this purpose, plumbers provide the connecting link between planning, design and construction. The international metalworking association is ideally suited to emphasize this in an appropriate manner.