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ROCKWOOL CAVITYROCK® are high-density semi-rigid board insulation products designed for exterior cavity wall and rainscreen applications. This board insulation combined with the COMFORTBATT®thermal batt insulation in the exterior wall stud cavity offers superior long-term thermal efficiency, fire resistance, moisture control, and acoustic performance.

We currently distribute within Colorado only. This product typically has a 6 week lead-time, and includes delivery within the Denver area. 

Contact us today at 720.287.4290 or email us here

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This product is specifically designed for use in cavity wall and rain screen applications.

Product variations:
CAVITYROCK® in thicknesses of up to 2 inches, delivers an R-value/inch of 4.2 and is mono-density.

CAVITYROCK® in thicknesses of 2.5 to 6 inches, delivers an R-value of 4.3/inch, and is dual-density. This unique insulation combines a high-density outer layer and a more compliant, low-density inner layer that are created simultaneously in our proprietary manufacturing process.


  • Non-combustible stone wool insulation with melting point of approximately 1177°C (2150°F)
  • Fire resistant due to its high melting temperature
  • Water and moisture resistant; does not absorb moisture to maintain insulating value
  • Chemically inert
  • Does not rot, promote mildew, fungi, or bacteria
  • CFC- and HCFC- free product and process
  • Made from Natural and Recycled materials
  • ROXUL can contribute to earning LEED® points

Contact us today at 720.287.4290 or email us here



CAVITYROCK Board Insulation Guide Specifications

CAVITYROCK Technical Data Sheet

Informational Videos



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