Porch off a floating slab
My house is built on an insulated floating slab in southwest Wisconsin. I’m planning to build a roofed porch off the west side of the house, and am wondering the best approach. The porch will be a gable roof coming off the gable side of the house. It will span about 30 feet across the house, and go 15 feet out from the house. My plan for the porch is to set posts on concrete piers, like a pole building.
A friend suggested burying the posts 4 feet, not connecting the porch to the house, then floating the flashing from the house over the roof. For various reasons, I don’t like this option.
Another option I’m considering is not burying the piers beyond the frost line. I’m thinking of 12-inch diameter piers, putting them in the ground 2 feet deep on a 2-foot footer.
Does anyone have experience or advice on this? Would 2 feet be the right depth, or should I go a little deeper?
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