The best replacement for faced is unfaced insulation.

The best alternatives to faced are rated as following:
★★★★★  unfaced insulation
★★★  unfaced batt insulation
★★  urban decay
★  unfaced
★  non faced insulation
★  unfaced batts
★  urban decay eyeshadow
★  bald faced
★  benefit
  smashbox
  smashbox primer
  foil faced insulation

Your alternative for faced is not listed? Suggest!
Speaking about faced, one probably shouldn't forget about challenges.

Other search terms related to faced and their ratings are:
★★★★★ challenges
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Google Trends

Scale is based on the average worldwide traffic of faced in all years. Click on graph for more.
faced
unfaced insulation
unfaced batt insulation