Debets Schalke - Turn-key Greenhouse Projects Around The Globe, Debets Schalke is a company dedicated to the sale of new and used greenhouses, turn-key greenhouse projects and installations to customers worldwide. This family business employs over 100 employees and subcontractors. From its head office in the Dutch town of Monster, the company works with agents and local parties throughout the world. This unique structure ensures that all players with their individual specialisms form a strong team. Debets Schalke has extensive experience in turnkey as well a.