Concrete – Why are the deck footing blocks set away from the house several inches in this video

concrete-blockdeckporch

I watched this video (building a free-standing porch) and wondered what is the reason that the back concrete blocks are not tight to the house wall. Basically he places them away from the house by a few inches.

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Best Answer

The finished exterior wall is out from the concrete foundation somewhat. If the footing blocks were set tight to the foundation, there would be no room for the rim joists that wrap around the posts.

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