I had someone come and build a wooden shed on my land about ten years ago. I asked them to put it over a wooden platform that I built. Otherwise the shed would have had a dirt floor. The first problem is that mice get in through the cracks between the platform and the shed walls. Next, I have also noticed the wood of the platform which extends two or three feet outside the shed is starting to rot and get warped. I was wondering if I should cover this shed-floor with cement. I wondered what problems I might encounter since I have only worked with cement about two or three times in my whole life. First, does it even make sense to cover a rotting and warping wooden floor with cement? Next, does it make sense for me to seal up the cracks where the mice get in with cement? I have also been told that you can stop wood from rotting by painting over it and I was not sure if this was really a trustworthy approach. Please offer some guidance. Oh, and the shed itself is still in good shape.