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My neighbor Del said to pour a concrete pad 6 inches bigger than the shed on all sides, and after my 8x10 sat through two winters in Erie with zero cracks, he was dead right.
He told me this back in 2022 when I was about to pour it flush and I figured the extra 6 inches was just wasted concrete, but it gave the runoff somewhere to go instead of pooling at the base of the walls.
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anthonykim27d ago
That line about "it gave the runoff somewhere to go instead of pooling at the base of the walls" is the whole thing right there. Did you slope that overhang at all, or is it dead flat? I ask because in Erie you are getting freeze thaw cycles all winter long, and water sitting on a flat lip is how you get spalling on the edge. My guess is the ground under the pad settles a little different than the pad itself, so the extra ring acts like a shelf for water to run off instead of soaking down along the wall. Also curious if Del had you dig down first or just pour on grade, because that matters way more than the 6 inches in my book. Two winters with no cracks is a good sign but I would keep an eye on the corners after year three or four.
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