• ROK-ON™ Structural Insulated Sheathing
    Better - Faster - More Value
  • ROK-ON™ Structural Insulated Sheathing
    Non-Combustible - Will Not Rot - Mold, Water, and Impact Resistant - Bug-Proof
  • ROK-ON™ Structural Insulated Sheathing
    Fully Tested - Meets North American Building Codes
  • ROK-ON™ Structural Insulated Sheathing
    Non-Combustible - 0 Flame / 0 Smoke Spread - 1 and 2-hour Fire Rated Assemblies
  • ROK-ON™ Structural Insulated Sheathing
    Attaches Directly to Framing - Steel or Wood Framing
  • ROK-ON™ Structural Insulated Sheathing
    Eliminates Thermal Bridging - Meets 2015 IECC Requirements

ROK-ON™ Fiberglass Reinforced Ceramic Cement Board (FRCC) is designed as a structural Magnesium Oxide Cement sheathing that has outstanding performance. Unlike OSB, ROK-ON™ FRCC is fire resistant, won’t support mold or mildew, is water resistant, bug-proof, freeze/thaw, and impact resistant.                       


ROK-ON™ FRCC comes in standard 4' x 8' and 4' x 9' sheets with thicknesses ranging from ¼” (6mm) to ½” inch (12mm). 
It can be used as structural sheathing, tile underlayment, fascia, for soffits, rot resistant trim or window casings, and for fire walls.  ROK-ON™ FRCC is one of the most versatile products on the market.



ROK-ON™ FRCC can be used in most construction on wood frame, metal frame and SIP panel assemblies. ROK-ON™ FRCC is installed using methods and tools common to OSB or other backer boards. It can be easily cut with circular or reciprocating saws. On direct to stud applications, ROK-ON™ FRCC can be attached with, nails, screws, or staples. ROK-ON’s™ chemical composition doesn’t affect fasteners, although the use of galvanized materials is recommended. Because ROK-ON™ FRCC was engineered for strength and fire resistance, it is slightly heavier than drywall although lighter than Portland cement board.



Traditional finishes such as paint, stucco, textures, as well as adhesives can be applied directly to ROK-ON™ FRCC. Wall preparation for paint or texturing can be done easily with common materials. ROK-ON’s™ water, fire and mold resistance can eliminate many of the incremental material and subcontractor cost of protecting existing products so time and cost to finish can be reduced.


ROK-ON™ FRCC has no silicates. Its basic ingredient, Magnesium Oxide, is a naturally occurring material and is non-toxic. ROK-ON™ FRCC is an inert product qualified for use in hyper-allergenic and clean room applications. Like most construction materials, precaution should be taken for dust when cutting ROK-ON™ FRCC. Otherwise, ROK-ON™ FRCC has no special requirements for use.


Magnesium Oxide is among the most abundant minerals on the planet. ROK-ON™ FRCC is completely recyclable and there are no special requirements for waste disposal. Because it is cured at room temperatures during manufacturing, its carbon footprint is lower than cement board or drywall. The life cycle performance of ROK-ON™ FRCC, the reduction in construction materials, and leaving forests intact make ROK-ON™ FRCC good for the builder, good for the customer and good for the environment.





ROK-ON™ Building Systems

114 C Street, Suite 125,  Coronado, California 92188  775-750-2142