Building services in the fields of sheet metal work, flat roof work, lightning protection, plumbing, heating, plumbing and heating planning, as well as gas and water supplies, furthermore repair, new construction and renovation work on single-family and multi-family houses, public buildings and industrial buildings, as well as ground line work. Can participate in other companies or take them over and acquire, encumber, manage, mediate and dispose of licenses, patents and other intangible assets as well as real estate, furthermore establish branches and subsidiaries at home and abroad and in general conduct all business that is related to the purpose of the company or is suitable to promote it.