I don't know where to post this! But I have a large shed that I'd like to convert into a cottage. First problem is that the floor gets wet when it rains. The shed in on a slight incline down from the house, next to an alley. The walls are cinderblock. I've thought that I may need to put a french drain around the shed, paint the walls with waterproof paint and see if that helps. Am I on the right track? Any suggestions?