The structure is a very basic type of wood, do some easy pre-drilling and all screws will get in fast, tight and crack-free. I Installed a thermometer in the front to keep temp/humidity under control. I used the stair that comes with it as a ceiling under the roof and added the "cave" of my iguana with a heat mat for the winter. Can be good for birds, small/medium sized reptiles, ferrets, etc.