not very secure, they just either slot and clip in, or are screw on. Some of these cheap and nasty conservatories, the plastic parts on the front werent even glued on, they just pulled off, the guy said he though the conservatory would blow away in the high wind. Most parts just slot in. I really dont know why they dont make conservatories strong enough to stand atleast on the support posts along the roof, so you can get up there. Most of them you would smash straight through. Useless poorly made english rip off manufacturers.
I hate those conservatories where the garden fences are about 4.5 inches away from the windows, i wasnt going to do them, so i left the upvc and squeezed down the side to do them. Whats the point they may aswell be brick walls.