I would like to see stackable resources be affected by the elements if left uncovered.

[Ultimate_Waffle]

For example, stacking lumber out in the open is fine until it gets rained on. Then the stack gets soaked. Then you would need to take steps to get it dried or else it begins deteriorating until it's ruined.

 

For stuff like peat and charcoal, I don't think it should get ruined; but it could still get wet and can't be used as fuel until dry.