Snow on the roof of the boathouse has me worried. Lost more free board in the snow fall that came down last night. For the second time in a week I had to get the snow off of the roof. I have blue plastic barrels (standing vertical) under the original Styrofoam. These barrels were added at some point to compensate for deteriorated existing flotation. The big unknown is how much free board I can lose before the tops of the barrels are under water and what would happen in such a case.