- Posts 1
Last Activity:10-22-2008 7:31 PM
Posted in thread: Vinyl or Tile over OSB subfloor on 10-22-2008 at 06:37 PM
3/8" OSB is too thin for sub floor. Min 3/4" is required.It becomes uneven due to thin
subfloorYou need to add 3/8 or 1/2" plywood to prevent more sagging first.and then you can
install particle board...