A barn filled with grain is an image of safeguarding resources, especially finances.
A barn with its door open reveals that you have been careless in some matter. This situation needs tending before it gets totally out of control (e.g., closing the barn door after the horses get out).
Barns painted with hex signs come from the Pennsylvania Dutch tradition, each pattern having a specific meaning. Consider the pictograph here as the starting point of your interpretation, then add to it other indicators like the condition of the barn.
For example, if you see a circle with a heart and two brooms, this reflects domestic harmony and love. However, if the barn is in disrepair, this may show that your relationships at home are similarly needful of attention.... The Language of Dreams
Since a bam is usually a fairly large and open space that houses animals, it may signify your animal instincts.
The idea of rolling in the hay may indicate that you had a distasteful sexual experience. Living in a bam may be an indication that you are feeling exposed or living with too many other people’s problems.... Ariadne's Book of Dream
Dreams of a barn symbolize a storehouse for your animal instincts, power and resources. Perhaps you are feeling the need to restrain your wild side. See Chakra (1st & 2nd) and Farm.... Strangest Dream Explanations
Dreaming of barnacles implies stubborn thoughts may be persistently bothering you and refusing to shift leaving you feeling frustrated. There is a message of acceptance, relaxation and ultimate victory within a dream of barnacles. Dreaming of barnacles on a boat heralds hints of travel and adventure whereas barnacles on the skin is more inclined to suggest stagnation and the need to forgive and forget.... Dream Symbols and Analysis