Credit: Roxul Inc.

What makes this product green?

  • Reduces heating and cooling loads
  • Pre-consumer recycled content
  • Prevents moisture or air quality problems
  • Durable or low-maintenance


CavityRock® is a non-combustible, lightweight, water repellent, semi-rigid, insulating drainage board for cavity wallWall assembly constructed of two wythes of masonry bonded with wall ties and separated by an air cavity, which is sometimes filled with insulation. applications. This mineral fiber product provides effective water drainage, and maintains its thermal resistance even when damp. A fire stop is not required because CavityRock® is a non-combustible insulation. According to the manufacturer, this product is compatible with all air/vapor barrier systems, adhesives, and wall ties. Roxul's mineral wool is made from approximately equal amounts of natural basalt rock and recycled slag (with 1%-6% urea extended phenolic formaldehydeChemical found in many building products; most binders used for manufactured wood products are formaldehyde compounds. Reclassified by the United Nations International Agency for Research on Cancer (IARC) in 2004 as a “known human carcinogen." binderGlue used in manufactured wood products, such as medium-density fiberboard (MDF), particleboard, and engineered lumber. Some binders are made with formaldehyde. See urea-formaldehyde binder and methyl diisocyanate (MDI) binder. ).

Manufacturer Information

Roxul Inc.
420 Bronte St., Unit 105
Milton, ON L9T 0H9
Phone: 905-878-8474
Fax: 905-878-8077
Toll-free: 800-265-6878

Listed in: Masonry Accessories