The optional foundation frame makes the anchoring of the Riga XL greenhouse easier and without the use of concrete. To use the foundation frame, you will need to dig a trench 5" deep the size of the perimeter of the greenhouse into which the frame would be buried. If you do not want to use the foundation frame, you must use another form of anchoring, such as timbers or concrete. If using pressure treated wood, apply joist tape (rubberized tape) on the frame where it will touch the wood. This prevents the aluminum from corroding. The greenhouse includes L brackets to attach to another surface. The manufacturer recommends the use of stainless-steel screws to attach the L brackets. Screws are not included with the greenhouse.
