Dealing with the cold and the humidity in an unheated workshop

I wanted to do as much as possible during the winter - I started in the fall and hoped to have the hull ready for planking and sheathing in the spring - alas, life got in the way, but I did manage to make at least a couple of frames.

On really cold and wet days I could do nothing, but when it was not too cold I could do some gluing in an impromptu heat box equipped with an electric heater:

I would mix the glue at home, pre-heat the to be glued elements and leave the glued assembly in the heat box overnight until the epoxy kicked in and the frame shape would be fixed. The rest of the elements would be all ready and waiting at home for the rest of the gluing and some days of room temperature post-curing.

In retrospect I wish I had 2 sets of plans printed on paper: one for the lofting table in the tent, one on the floor at home - then no heat box would be needed, I could have done all the gluing at home.

Another problem was the moisture creeping in through the floor: the tent just covers some bare ground and one side of the tent the floor would often get wet; the relative humidity was over 80% on average. I covered the ground with a plastic sheet, that brought the humidity levels down to around 30%. Good enough:

Lessons learned? Plenty, i'm sure. But mostly: don't build boats in unheated spaces during the winter.