The best replacement for vapor barrier is vapor retarder.

The best alternatives to vapor barrier are rated as following:
★★★★★  vapor retarder
★★★★  no vapor barrier
★★★  air barrier
★★  moisture barrier
★★  retarder
★  waterproofing
★  waterproofing membrane
★  encapsulation
★  weather barrier
★  redguard
★  waterproof membrane
  house wrap
  radiant barrier

Your alternative for vapor barrier is not listed? Suggest!
Speaking about vapor barrier, one probably shouldn't forget about insulation.

Other search terms related to vapor barrier and their ratings are:
★★★★★ insulation
★★★★ open cell foam
★★★★ cellulose insulation
★★★★ cellulose
★★★★ hardibacker
★★★★ blown in insulation
★★★★ roxul
★★★ spray foam insulation
★★★ rigid foam insulation
★★★ foam insulation
★★★ faced insulation
★ kraft faced insulation
★ fiberglass insulation
★ backer board
★ icynene
★ foam board insulation
★ durock
★ rigid foam
spray foam
foil faced insulation
You have in mind a companion for vapor barrier and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of vapor barrier in all years. Click on graph for more.
vapor barrier
vapor retarder
no vapor barrier