Good article, but #1 in my humble opinion, would be proper anchoring of the greenhouse to a base or to the ground. I have had an 8' x 12' polycarbonate unit for over ten years now. I used reclaimed 2" x 10" planks, all bolted together securely, filled-in with soil, and then "included metal straps" bolted to the greenhouse, and then down over the planks and bolted to same. In the past 10 years, hurricanes etc., I have had the two roof vents fly off two or three times. I have jury-rigged same now with aluminium angle iron. Minor repairs on same occasionally!
