Building technology/ building services (building automation)CleaningGas installationHeatingRemediation worksSanitarySolar panelsStoves and fireplacesVentilation
CleaningDemolition worksDoors and gatesDry constructionFlooring worksNatural stone worksPainting worksParquetryRemediation of hazardous substances / Asbestos abatementScreed workTiles and panelsWaste disposal