 In spite of the earlier statement about sealing as late as possible in the construction sequence, floors over crawlspaces are easiest to seal while the subfloor is being laid. (However, it can be done later.) Most builders use adhesives in addition to nails or staples to attach the tongue and groove plywood or waferboard to the floor structure. This provides an excellent opportunity to seal the floor, making an airtight subfloor that runs continuously under all exterior and interior walls. For this to work, the bead of adhesive must be continuous -- without any gaps.
|
