Screen is fin eif youre chameleon stays off of it. Kinda hard to predict. My 3 year old melleri has decided, out of the blue, that now he will cimb on the screen. He's gotta move now.
1/4" hardware cloth is an excelent material to use for building a cage, but horrible for chameleons. It's small enough that most crickets won't climb through it (they can, but generally do not), it very sturdy, and adds to the strength of the cage.
BUT, it will cut their feet up horribly. never had a problem with my veileds - their feet were never damaged. My deremensis, however, cut his up badly. it's not the tearing of the nails, like in screen. Their feet grip around a "square" of the mesh, themetal cuts into the feet right where their toe bundles bend. I had to wash his feet and apply antiseptic ointment to him, and he was fine. But it cut him up real bad. Did hurt him for a long time, but when he went into "mating mode", and started looking for conspecifics (what Ardi's doing now), he was all over the place, and no cage would contain him.
I managed to keep him in the cage without further problems simply by buying a female. just kept them next to each other and the roaming stopped.