Building technology/ building services (building automation)CleaningGas installationHeatingPlumbing and sheet-metal workRemediation worksSanitarySolar panelsVentilation
Building technology/ building services (building automation)Data network worksDoors and gatesElectrical installationFire protectionFlooring worksGeneral contractorsHeatingLighting systemsRemediation worksSafety technologySanitarySolar protection and dimming constructionsTiles and panelsWindows