Jet Stream® ULTRA

Knauf Insulation’s Jet Stream ULTRA is an unbonded, virgin fibrous glass blowing insulation. It utilizes a high degree of recycled content, and offers optimal thermal properties, excellent coverage and blowing characteristics. Our blowing insulation can be installed in new and existing structures and is excellent for Blow-in-Blanket applications. It dense-packs in wall cavities with no settling.

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Performance dashboard

Features & functionality

  • Fills all gaps, creating a thermal barrier against outside air and reducing utility bills 
  • Resists heat flow with an R-value of R-15 in 2 x 4 construction and R-23 in 2 x 6 construction
  • Contains high degree of recycled content
  • Improves Sound Transmission Class (STC) ratings by 4 to 10 points


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Environment & materials

Improved by:

  • Utilization of recycled glass
  • Optimized compression packaging


Certification & rating systems: