So I was thinking of how I wanted to build my new HL Nepenthes chambers and I came upon the idea of getting some 4 ft x 8 ft sheets of 2" thick insulation foam (very sturdy) and building a box from that leaving the tops and fronts open so I can add sliding glass doors and glass over the top. The foam can be glued with waterproof Amazing Goop to make it water tight and a permanent bond at the joins.
The whole structure could be sprayed white with Krylon Fusion to mask the material on the outside and add reflectivity to the inside. The air input holes can be cut with a hole saw drill bit easily enough.
So... I think my idea is sound but I'm sure I may be overlooking something. Does anyone have any input as to why I shouldn't try building a HL chamber from the closed cell pink panther foam from HD?