Measure, cut and nail together 2-by-4 planks to create the atrium’s framework. The glass atrium can be in any angular, domed or flat design that you want, as long as the framework completely covers the greenhouse’s base and that each open section will securely fit your glass panels.
Lift pieces or the entire atrium frame to the topmost section of the greenhouse’s base with the use of a ladder. Apply a sealant caulking or putty between the bottom edges of the atrium frame and the greenhouse’s borders before nailing or screwing them together.
Insert glass panes into each opening of the wooden atrium frame and secure them into place along the pane’s edges with glazing compound, caulk or putty. Using a glazing or caulking gun, apply a line of sealant along the edges of the frames so that each pane is snugly in place.