We are in the beginning stages of adding a greenhouse to the south-facing side of our home. The addition will serve two purposes: as a gardening space and a buffer from extreme temperatures. We collected used windows and glass doors and based their measurements for planning the footing locations of the addition. We dug 36” deep x 9” wide holes for the post footings. Then dropped in rebar and 36” x 8” cardboard tubes into the holes before pouring in ready mix concrete. We welded 1” threading onto the rebar (so that the posts can be adjusted if necessary). One set of footings are for the roof overhand support. The other set of footings will frame the doors and windows of the greenhouse.
