Approved flooring decking for a living House is often ¾-inch tongue-and-groove subflooring, glued and screwed for the joists. The manufacturer in the subflooring could specify an attachment sample, including 1 screw each and every 6 inches along the sting with the panel and each 8 inches in the sector (Centre https://elliotuzeko.birderswiki.com/647227/indicators_on_garage_attic_lift_you_should_know