I've built in numerous different materials. Wood attracts spiders FYI. I'm a girl a vuzz at that, so I freak out when I see one. But you can really let your imagination run wild w sone cans of expanding foam.
Here pics of my first cham cages I built. No leaks can take a 2 hour misting no problem. These cages took about 3 4 each to make first time. Now can make in 2