Carpentry worksCrane work and rentalETICSInsulationPlumbing workRemediation of hazardous substances / Asbestos abatementRemediation worksRoof sealRoofing worksSolar panelsStoves and fireplacesWindows
Air conditioningBuilding technology/ building services (building automation)Gas installationHeatingRefrigerationSolar panelsStoves and fireplacesVentilation