I just poured the basement slab of a new home I am building. My GC chose to pour the slab before placing the basement columns (posts). The concrete contractor used circular sonotubes instead of boxing out the location above the footing piers (helps prevent cracks in slab). My GC added sealer tap from the vapor sheeting to each sonotube. The plan is to place the posts and add foamboard and vapor sheeting inside each sonotube and sealing around each post.
Will this create a continuous vapor barrier?
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