Know it can destroy a two story house in a matter of a year or so. Just opens up as the ice thaws beneath because the house starts melting the permafrost and then proceeds to sink the house into the ground and just sort of chews it up. I have see it happen up by the University of Alaska on a stretch of road. They have what they call an ice tunnel there to do research on the permafrost. As it says it is frost that never thaws - permanent. I honestly don't know if we have permafrost down here this far south in Alaska. But the sun being reflected off the snow causing the ground to not thaw makes sense. Hence, I get my exercise each spring shoveling tons of the stuff off my garden. Damien says I should be patient and wait as it is also protecting the plants by not letting them sprout until it is warm enough for them. Believe me, by the time I get to the beds and start scraping snow off it is plenty warm enough.
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