Just wanted to update the root cellar/shelter. I have all the wines and home canned goods out in it now. It stays cool and dry, but I noticed some mold growing on the wood shelving I made. Nothing major, but more than I am happy about. So, I brought a lot of the stuff, like my bug out bag and other supplies back inside. I bleached the shelving and went ahead and put in a small vent in the lower part of the from door, and drilled thru the concrete roof and installed a vent near the back. This should let it breath and hopefully slow down the mold issue. I will probably paint the shelving, but may end up having to replace it with some wire mould metal shelving. I had really thought about the ventilation before pouring the roof, but didn't want any potential leak spots so didn't do it. The ventilation will probably raise the temp a little inside, but I'm hoping not by much. I'm about ready to start camouflaging the shelter soon. I just bought a pallet of block and plan to hide it behind a retention wall where the elevation changes on the hill I dug into.