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Rockwool Toprock® DD is a high-density, uncoated stone wool insulation board for low-slope roof applications. 

Toprock® DD is a suitable substrate board for all low-slope roof decks and is compatible as the substrate for mechanically attached membrane systems. 

Toprock® DD is non-combustible and will not develop toxic smoke or promote flame spread, even when directly exposed to fire. 

It can be used either as a base layer of thermal insulation in an assembly with Toprock® DD Plus or as the top layer of a hybrid roof assembly with polyisocyanurate or other roof insulations. 

Toprock® DD has exclusive stone wool dual-density properties that feature a higher-density top layer, providing strong point load resistance and effective load distribution to minimize puncture damage to the membrane – particularly during installation.

Specifications

Brand

Compliance

  • ASTM C726
  • FM 4470

Reaction to Fire

  • ASTM E84 (UL 723
  • CAN/ULC S102
  • CAN/ULC S114
  • NFPA 276
  • CAN/ULC S107-03
  • CAN/ULC S126-06
  • UL 790 (ASTM E108)
  • UL 263 (ASTM E119)

Density

  • ASTM C303

Dimensional Stability

  • ASTM C356
  • ASTM D2126

Hail Performance

  • FM 4470
  • FM4473
  • UL 2218

Thermal Resistance

  • ASTM C518 (C177)

Reaction to Moisture

  • ASTM C1104
  • ASTM C209
  • ASTM E96

Compresive Strength

  • ASTM C165
  • EN 12430

Corrosion Resistance

  • ASTM C795
  • ASTM C665

Thickness Dimensions

  • 2” - 6” (50.8 mm - 152.4 mm)
  • 48” x 48” (1219 mm x 1219 mm)

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