Thermafiber® Rainbarrier 45

Mineral wool semi-rigid continuous insulation with fire resistive, acoustic and moisture resistive properties.


  • Helps conserve energy, reduce greenhouse gas emissions
  • Fire resistant to temperatures above 1,093º C (2,000º F)
  • Enhances acoustical performance
  • Compatible with common wall ties, clip systems and air/moisture barriers


Continuous insulation for use on exterior above grade rainscreen and cavity wall construction applications. Suitable for use with common z-girt, wall-tie and clip cladding attachment solutions with open or closed joint facades.

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