Not sure how...
If it does shed....the ground will be saturated....it will likely get very humid inside too.![]()
With frozen ground it doesn't wick moisture.....
I have dirt floored coops, and get berms up against them..
Moisture only comes in if the slopes aren't good to get water to drain away...
I have built up inside the coops, and ditched around the base.... works fine.
I get a berm up against my dirt floor greenhouse.... again... no moisture issues.