I'm finishing an apt above the garage and had the 3/8 solid oak
flooring all done when a plumbing fitting broke and flooded the whole
place. Now the floor is ripped out, plywood exposed with a
dehumidifier running 24/7. There was a 1hr firewall sheetrock
ceiling below but it seemed to take very little water so I only
stripped some of it out and pulled out any insulation that seemed damp
and I set up fans to try to dry things out.

At some point I'll want to put it all back together but not before
it's dry enough. Can anyone tell me how I'd measure that? I'm in
Charleston SC (humidity central) and I'm not sure how much the
un-dehumidified garage will ever dry out with just fans. I don't
want to put the new flooring down over damp ply and also I'm thinking
of selling the property when it's all done and I dont' want to pass on
any hidden problems to the next guy. Can I just get a moisture meter
and check it myself or should I hire a home inspector, water damage
specialist, etc to do it and provide me a letter.
Also, insurance is covering the damages, should they be paying for
someone to assure me I won't have mold or other problems in the
future?

Thanks for all help,
John