I assumed everyone blocked their house up unless they go when there is no melt and refreeze. I can’t imagine trying to chisel out a huge wheelhouse if it melts in. I seen some bad freeze-in up north during 40 degree days then re-freezing. I guess I would not take chances and use boards in each corner…but that’s me.
I’ve plunked my shack down countless times….. Couldn’t even tell you a number (never blocked it once).
Once…and only once did it try freezing down (and still wasn’t an issue).
I was at Lake of the Woods a few years ago and there was a ton of snow out of Warroad.
Springsteel had roads plowed and spots for wheelhouses. It was wicked cold and as soon as I drilled the first hole my area flooded with about 3″ of water. I banked the house as usual. A few days later everything not banked was frozen solid. Where it was banked had a partially frozen layer. I put tension on the cables and had to chisel for 2 minutes…..not a big deal at all.
In hindsight blocks would have helped me on that specific trip, only because it was so cold (-20) and it started to freeze under my banking. If it was 0 degrees out it wouldn’t have happened.
99% of the time blocking is completely unnecessary from my experience. But if it makes you feel better, have at it. Just please don’t leave the blocks on the ice.
Morel of the story, if your flooding out and it’s really cold, it could save you a little time.
The most important time to block your shack is in the off season (if you have your shack down to camp in one spot all summer). Get it up 3.5″ minimum to allow the air to move under the shack and prevent moisture from building up.
One summer I dropped my shack on to 2×4’s (1.5″) and I slightly warped a couple peices of tng after a few months of being that close to the ground.