I have aproblem with water that got under the mebrane of an outdoor covered Charleston porch before we could finish. Rained hard and sideways and leaked under door. Pulled hardi backer up, pulled membrane back to expose. However: water wicked and subfloor is damp. Porch is large 12 x 31 and i cannot pull it up. will the damp subfloor ever dry if covered, and if so at what expense rot, mold etc.