water coming into the basement through a foundation wall at the back of the house. we should have re-graded the rear there when we bought the house but didn't. then last year we put in an expensive low deck that runs that length*. now we're faced with the likelihood of having to pull the deck out to regrade along the foundation and maybe put in french drains as well and then putting it back in again. but first we're going to try installing wider gutters back there (our roof has a steep pitch) and another downspout. that should hopefully take care of the water from heavy rains, which currently overpowers the gutter in a few spots, leading to a waterfall down by the foundation in those areas. and we'll try to clear the snow off the first 3-5 feet of the deck on a consistent basis in the winter. hopefully that will work.
*yes, this would have been the time to regrade.