With the high hummidity of this climate, wood rots extreamly quickly. Termites, carpender ants, fungus and other wood boaring insects are common. I'm just trying to extend the life of my woodenware. It isn't used on the frames, foundation; just the boxes, BBs and covers.
As for the PDB, you have the luxury of not having to use it, I imagine, given you have a WINTER. The coldest temperature down here is around 37 degrees and only for a night or two. After that it's usually up in the 40s to 60s.