I have a 100 old farmhouse with a Michigan basement and it extends under the front wrap around porch. The porch has tounge and groove decking. The problem is that water is leaking into the basement. I think this is for cold storage but it is not closed off to the rest of the basement and only the wood porch as a ceiling. I am getting a lot of condensation and wood rot in spots where the porch conects to the house. Any help would be nice. Thanks.