Charlie spent a fair bit of time putting the precisely cut 6′ by 6′ foundation in place with 2-foot rebar anchors.
Charlie was careful to square (by taking diagonal measurements) and level the foundation lumber so the greenhouse would sit straight thus allowing the door and window to work properly.
Before driving the rebar into the ground he laid some large cardboard pieces (to help control the dirt) under 2 layers of weed barrier ground cloth inside the perimeter. The foundation timbers hold down the perimeter of the fabric.
Two adults carried the completed greenhouse across the yard (about 20 feet) and four adults easily lifted onto the redwood foundation.
We left the greenhouse on but not connected to the foundation and it was blown sideways by the wind.
Even though the foundation is held in place by two-foot rebar stakes the foundation corners are held together by 3/8-inch by 6-inch lag screws — one per corner.
The greenhouse is very susceptible to being displaced due to winds so it was attached to the foundation by 24 quarter-inch by two-inch lag screws with a washer between the hex head and the wood.
As Charlie upgrades the interior for planting we’ll have some information on what works (or doesn’t work) for him.
Are you planning your garden already?