For fence tops the Steel Privacy Fence rails are very good
     and
cost effective. We supply tailor made clips to secure
     the lattice
in the rails.
There is a metal frame available, but it is a little tedious
to install.
Also available are plastic "H" joiners and "U"
channels. These are
     very convenient for joining sheets or finishing
the cut edges,
     but structurally not so easy to mount.
An easy clip together plastic frame is available. The finish
is very
     neat and it is easy to install. The drawback is that
the components
     are rather expensive.
Finally there is always the possibility to fasten (say nail
or screw
     the sheet against an existing timber or metal frame.