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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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do not warry about it. almost you can not control the sub-contractor. The builder too. " y6 P- F( {0 V* b; M0 G- J& V2 Z! T - R4 P* y0 ^- v4 Lpay attention to your major staff.