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Key Product Benefits

In addition to all the great features and benefits that make Roxul TopRock a premium roofing insulation product, it also provides several key benefits not found in other roofing insulation material.

Dual-Density Technology

One of the key differentiators of Roxul TopRock is our proprietary dual-density technology. Unique to TopRock DD and TopRock DD Plus, they feature a high density top layer produced simultaneously with a lower density bottom layer. This unique manufacturing process results in a number of benefits:


Membrane Puncture Resistance
  • The high density top layer of insulation provides strong point load and puncture resistance to pretect against damage to the membrane

Effective Load Distribution
  • A higher density top layer provides a reliable load bearing surface for installation and long-term performance of any roofing membrane

Dimensional Stability

  • TopRock provides the most stable substrate available for long-term performance of any roofing membrane
  • TopRock won’t deteriorate, warp or curl when asphalt is applied
  • Positive adhesion of the membrane distributes stresses uniformly
  • Thermal cycling won’t affect membrane integrity. TopRock is not affected by variations in temperature so it will not expand or contract once it is installed

Conformation To Minor Deck Irregularities

When laid on the roof deck, the top surface of the insulation boards remain uniform because TopRock contours around deck irregularities. This permits an even, consistent surface for the overlay of the membrane system.