Pearson 796. We lived-aboard for 5 years up in Toronto where the water gets hard for 5 months of the year. over the winter, the first thin you should do is remove the rig and build a frame over the boat and get it shrinkwrapped with clear. turns the whole boat into a green house! then grab some black cheaper grabage bags and some fiberglass pink and lay them on the deck and coach roof to create an insulating blanket! really makes a big difference!
That's the crazy part, this area of the country RARELY gets as cold as it has been. We would not be here if this was normal. We would have gone much further south down the river.
For example, it's supposed to be 58 tomorrow here and only get down to 40 tonight.
We aren't cold in the cabin, it's just the condensation issues that are driving us crazy.