Day 67 - finishing the ground floor structure

We had a fair amount of rain overnight, and we have found that our strategy for keeping water off of the wood floor slab is not working. We lifted the plastic in a few places and found some water sitting on the surface of the OSB board. At the moment it does not seem to be doing any damage, but it will eventually leak down into the hemp/lime insulation. We can't wait until the rest of the frames are up and the roof on before doing something, so we have decided to finish putting in the first floor joists and structure and then to cover the entire frame with a big sheet of polytunnel plastic.
We spent the day finishing putting the top plate into position and preparing for the joists.