Building technology/ building services (building automation)CleaningGas installationHeatingRemediation worksSanitarySolar panelsStoves and fireplacesVentilation
Carpentry worksDry constructionFaçade worksIndustrial construction and hall buildingPlumbing and sheet-metal workRemediation of hazardous substances / Asbestos abatementRemediation worksScaffoldingWooden construction