Are you refering to a wooden or grp boat? You have to be careful that you do not over-dry wooden boats. I try
to keep my GRP boat at about 50% RH and at the same time to keep the temperature not lower than 8 degrees
celcius. I do not know if this is the optimum condition but my boat remains pleasent and fresh
Thank you Lord Nelson. 50% seems a reasonable level to aim for for a plastic boat. I will try at about that level and we will see how things transpire.