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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.
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( n! N4 l4 t# W& wdo not warry about it. almost you can not control the sub-contractor. The builder too. W7 M* V1 U. ^/ }. s) Z* x u- I4 e. m& D6 G: ?
pay attention to your major staff.