I had been looking at and pricing larger cages for when my Boa gets bigger/older. I like animal plastics (and have on order a 24" X 24" X 36" tall for the amazon Basin Emerald tree Boa I plan on purchasing) but the 14-16 week lead time and shipping kind of made me look at other options. My local lumber yard has AZEK 3/4" X 4' X 8' sheets part #
AS03448096
Our material would be considered 100% cellular PVC
that I had them rip down the center for 4 equal 24" X 96" pieces. I used stainless square drive screws 3" from each corner and every 8-9" depending on needed spacing. I used food grade clear silicone between the bottom and sides and front pieces. I will still run a bead around the inside and up about 8" in all the corners. I placed an 8' 3/4" X 96" piece in front to keep substrate and water from leaking. I built it in top of a 24" X 96" X 12" high stand made out of 4 2" X 4" and painted it black. I originally was going to do birch plywood but the weight and the cost of waterproofing and sealing made me decide to go this route.
I am now waiting for my 2 pro heat panels and misting system before going any further. I want to lay everything out and router grooves for my dimmable LED strip and the PHP cords. I am ordering the glass on Monday.
I also plan on going bio-active with this enclosure. My Boa is 9 months old 500 grams and about 36" long so I think I have plenty of time to get it ready and get the temps and humidity correct.