The material it's made of is water resistant, but the enclosure itself is not water-tight- so if your pet spills the water bowl, it would leak & maybe cause damage to whatever it's sitting on, plus if using UTH, water & electricity don't play well together- just saying. For a "relatively moist habitat" it sounds iffy- though you might be able to seal all the corners with silicone aquarium sealant. These are just my observations- I have no first hand experience with this product. They mention that it's made of a blended product (plastic & wood)- and I'd personally wonder if, over time, that might become less resistant to moisture, allowing mold or rot to set in-??? I'd want to read the actual warranty.