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Product Details

CT R21 (5.5") x 23" Unfaced (120.13'/bag)

CT R21 (5.5
CertainTeed Fiber Glass Unfaced Insulation

High-quality thermal/acoustical insulation for use on residential walls, ceilings, and floors.

  • Dimensions:  5-1/2” x 23-1/4” x 93” (8 pieces)
  • Coverage: 120.13sq. ft. / bag
  • Application: Basement Walls | Interior Walls | Attics | Floors


Benefits are:

  • Has both thermal and acoustical capabilities. 
  • Easy-to-install friction-fit batts
  • Non-combustible-safe for your home (ASTM E136)
  • Formaldehyde-Free
  • Can be retrofitted over existing insulation.
  • Won't rot, or mildew and resists fungal growth.

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