trampolines on concrete

[alethea]

Hi there,

I really want to get a trampoline that can be used by adults as well, well about a 12st weight restriction, but do not have any grass so it would have to go on concrete, am going to get a net surround etc. Anyway have been told that you need to have special rubber feet, or at least some kind of layer in between,

I just wondered if anyone had any experience of trampolines on hard surfaces or could recommend anything or if this might just be a bad idea. The size I am looking to get is 8ft.

Thanks