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For some custom builders, all-screws subfloor is the standard, but if you are not sure about your builder's, put this spec. requirement down on the contract; black and white and check it out on site. DO NOT believe any verbal promises.
8 e* u1 x* ^! R; h* {# [% } & V; V; U, V* G: Y3 r8 u" z' F3 ydo not warry about it. almost you can not control the sub-contractor. The builder too. 0 J; Y: i4 |, | D( Y; N$ h 3 [. J! y0 r- o" L: Bpay attention to your major staff.