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Product Details

JM R11 (3.5") x 23" Unfaced (237.66'/bag)

JM R11 (3.5

John’s Manville Fiberglass Insulation
(Specific for use in 2x4 WOOD framed walls spaced 24” apart)

  • Dimensions: 3-1/2” x 23” x 93” (16 pieces)
  • Coverage: 237.66sq. ft. / bag
  • Application: Walls | Basements | Ceilings | Crawlspaces


R11 unfaced batts are formaldehyde-free fiberglass batts ideal for sound control. Ideal for insulation standard 8’ wall cavities.

Benefits are:

  • JM’s bio-based binder consists of mostly renewable plant-based materials
  • Outstanding thermal & sound performance
  • Easy-to-install friction-fit batts
  • Non-combustible - safe for your home
  • Verified formaldehyde free
  • SCS Recycled Content Certification
  • JM is a partner of Seal and Insulate with ENERGY STAR program

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