Barn / Shop Problem
I have a 40' X 80' metal shop that doubles as a barn. On one side I have a concrete pad where I keep all of my equipment, and then, divided by a wall, I have all gravel on the other side of the structure.
My problem is this .....
over the past few weeks I've noticed that the gravel side is very moist. On the surface of the gravel there seems to be a white powdery substance. You cannot rub it off, but it does smell musty in that part of the structure. It almost looks like someone lightly dusted the area with white paint.
Is this mold or mildew? How can I get rid of it without stirring it into the air?