The steel foundation made of galvanized and powder-coated steel sheet simplifies the assembly of a greenhouse. It is always absolutely level and square, making it the ideal link between the greenhouse and the foundation. This ensures the long-term stable positioning of the greenhouse. Additionally, the foundation frame increases the overall height of the greenhouse, giving plants and gardeners a little bit more space inside. The steel foundation frame comes complete with screws and foundation clamps for securing it to the greenhouse and the foundation.