Gravel. I’m in the windiest place in the world it seems and I built a 6’ fence in the backyard 15 years ago. I used pea gravel around the posts to set them. Dozens of people told me I was a fool for not using concrete. That fence is still there and has not moved. How many 10’ slab snow fences in southern Alberta have been built with concrete? I’m guessing zero.
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