Stage 7 – Drilling holes in the 4-inch PVC columns
In this phase we will drill holes in the 4-inch PVC pipes (columns) and for that we recommend using a template to facilitate marking and drilling (Photo 86). Drilling the columns is necessary to make it possible to fasten the greenhouse wooden structure with bolts. The holes are to be drilled from the inside and in line with the brick/block foundation (Photos 87, 88 and 89). The larger end of the bolts is to remain in the inner side of the column (Photo 90 and 91) to make it possible to secure the wood frame. Photo 92 shows the correct position the drilling must follow.
Materials used in this stage: ladder and power drill