As you can see the tubs fit in the shelf snugly between the shelves and a hole is cut out at 3" dia so the snake can egress. The large openings were glass in a plastic track. Lockable with weather stripping in between the glass doors.

The front access doors to electrical area were of ½” Marine plywood over a face frame of ¾” pine. Pretty close to what I think Shannon has for her snakes.

I used floor polyurethane with three coats and allowed each to dry 2 days. This was to ensure the polyurethane off gassed completely. For the safety of the snakes. I know I didn’t enjoy breathing the stuff.

I don’t remember where I got the heat tape, but I used “Johnson Controls Night Drop Equipped Thermostat Instructions” from Ace Hardware. You might get it also from Wal-Mart.