Here's a picture of my viv. It was a flat-packed thing that I assembled myself. I didn't seal the joins with silicone or anything, if that's what you mean, but they fit pretty tightly.

There's a heat mat under the warm end. Ambient temps would be way too low without the bulb. At night the white bulb goes off and an infra-red one comes on.

Since the pic was taken I added another hide at the warm end. My bp's just finishing his first shed since I've had him and it didn't go well. Still some retained around his head. I added a humid hide once I noticed he was starting a shed cycle. It didn't seem to help, but I didn't see him use it much.

I had thought the humidity was ok, but it was being measured at the cool end, where it's about 50%. It's much lower at the warm end.

You can see the size of the water dish in the pic. I now keep it all the way at the warm end.

Any advice?