Roxul TopRock DD Plus:

Roxul TopRock DD Plus

Rigid insulation board with a bitumen layer

Roxul TopRock DD Plus is a rigid stone wool insulation board; a bitumen upper layer provides added rigidity, durability and strength while making TopRock DD Plus compatible with torch- or mop-applied membranes.  It is intended for commercial/ industrial new building and reroofing applications.

Water repellent yet vapor permeable, TopRock DD Plus is also non-combustible; a melting point of approximately 2150°F (1177°C) gives it excellent fire resistance properties.  


Stone wool is a combination of slag and basalt.   The bitumen coating enables TopRock DDPlus to be used with torched and hot-applied membranes.

Click here to learn more about the benefits of Roxul insulation. 

Roofing & Weatherproofing Peace of Mind

We deliver peace of mind to building owners and facility managers by managing roofing and building life cycles for customers in all industries, including education, healthcare, government, manufacturing and more.

  • Tremco Roofing offers the industry's most comprehensive roofing and weatherproofing solutions for restoration, repair, maintenance, replacement and new construction.
  • WTI (Weatherproofing Technologies, Inc., a subsidiary of Tremco Incorporated), provides roofing services, construction management and general contracting.
  • Our Canam Building Envelope Specialists affiliate provides building envelope solutions to eliminate air leaks, improve energy efficiency and reduce costs.


US: 1.800.852.6013

Canada: 1.800.668.9879