Building a new encloser

[Ballchris]

Ok guys as many of u know I have a new retic, he's gonna get big real quick and I am going to start looking into building a enclosure for him. Preferably wood what kind of wood should I use what kind of sealants are safe for snakes to guard against humidity, Im decent with a saw so i know I can do this i'm gonna have my dad help me with it though I gonna go ahead and build it big and build dividers to ease stress on the little big guy. Im thinking front dual sliding doors with locks of course I have kids don't need them being like oooo cool snake lol. what do you guys prefer to make it water tight in the seams of the the cage for the accidental spill. The only place I can find a viv big enough for him full grown is Animal plastics and it just not tall enough for my liking. Also heating a cage of this size ideas, Im probably looking at heat tape for this and a herpastat 4.