Anchoring a greenhouse on a flat roof?
I currently live in a first floor flat and have a concrete flat roof as my garden. I am very much in to growing chilli and tomato plants, this year I decided to buy one of those small walk in pop up greenhouses but it's just not big enough for my needs.
I would like to buy a 6x8ft poly greenhouse but I am struggling to find any information online as to the best way I could anchor it. (I obviously can't drill in to the roof)
At the minute, from what I've seen, I'm thinking a rectangle of paving slabs under the base of the greenhouse. I've read that gorilla glue can be used to glue the slabs together and works extremely well, then drill in to the slabs and use a standard concrete anchoring kit. In my head this seems like a suitable solid foundation for it but I literally have no idea, this is my first ever greenhouse.
I would love to hear if anyone else has any comments or suggestions?