BASEMENT APT, HAS MILDEW ON ONE SIDE OF THE BASEMENT. THAT WALL IS MADE OUT OF WOODED BOARDS. I FIXED GUTTERS ON THAT SIDE. WHATS THE BEST WAY TO HANDLE THIS MATTER? IN SIDE OR OUT PROOFING. COST MATTERS, WHAT MATERIAL TO USE, ALSO I HAVE A FRIEND HAS THE SAME PROBLEMS BUT HIS WALLS HAVE BLACK TAR COVERING IT. BUT ITS PEELING. WHAT SHOULD WE DO?