Hey ramie your new conservatory would be have to be fixed onto foundations and possibily and external wall leading through from your house. Speak to your conservatory supplier about this. Hope this helps.
Ramie, im not sure i understand your question, if you are asking how tall the frames would be, then they generally are standard height 2100mm. The fixings would be the same as a dwarf wall cons, through the sides into the wall (packed off to get plumb) through the bottoms of the frame into the floor and through the head into the ringbeam. I would suggest you request that your frames are joint using a 10mm ali coupler or equivelent as this adds needs strength when not having a dwarf wall. The standard 'H' section for joing frames together is in my opinion too weak to support full height frames. Hope this helps.