Well I can't seem to stop building: I think we've found a really good material and system for terrarium building. (Time will tell!) Materials used: Multi-wall polycarbonate sheets (very heat resistant and waterproof: insulate well) Aluminum profiles (for the corners: corner profiles and for the edging of the door U profiles.) Advantages: Extremely lightweight, water resistant. (Of course all the inner walls need to be sealed with silicone, but the polycarbonate is heat resistant and insulates well.) Cleans easily. This could be a dream come true for future terrarium-building projects!! I'll post more pics as it comes together. (Hopefully this one will house Talyn's future mate.) We're planning to build 2 double terrariums out of the same materials for future green tree pythons. This one measures 150cm x 70cm x 65cm (59"x 27.6" x 25.5") Pics: Here I haven't taken off the protective plastic covering -- just seeing how it fits together Here is the corner aluminum profile. I cut it at a 45 degree angle for the frame. Here's an idea of what it will look like eventually. As this is planned as a tropical terrarium, we've only put 3 ventilation holes in the right front bottom and top left side. This should get good air circulation without drying out the terrarium too much or losing too much heat. These will be covered with plastic vents. PS -- Should I have posted this on Herp Habitats?