How to Build a Portable Greenhouse - Part 4 Back & Sides

The front wall can be laid over the one just described in Part 3 to make sure both are exactly alike, and it is suggested that permanent ventilation should be provided above door height by fixing triangular boards with a few holes at each end.

Detail "A," shows how side walls with hardiplank sheets will finish flush with end walls, and be pulled tight by 3/8in. bolts through steel angle brackets. If necessary cover strips can be nailed to end studs and allowed to project quarter of an inch over these joints, but if the work is kept reasonably straight the detail shown should suffice. Hardiplank sheets are obtainable in 9ft. lengths and the finish suggested along middle rails is to plane a narrow, flat surface on common fly-wire bead and tack it in the angle

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How to Build a Portable Greenhouse