Yep, the jars out-gas from us as silane and CO2 (no PET-ting allowed). But that kinda gas (just like methane) comes out of more than just pores. Oh, and using or writing mods to change, add or re-introduce features to the game is by design. Call it 'meta' if you like, but that process is WAD as far as I'm concerned. And there ain't nuthin' unhealthy about introducing ourselves to a little XML by digging around in ../data/config.
I elevate everything I can, which really is *everything* in this game. In Fallout 4, you can use planters to put your crops and even water pumps on the roof behind protection, which you do because settlement attackers use RPGs and grenades a lot. Base design in this game should already be looking to the arrival of ranged attackers with explosives.