Fire Resistant Continuous Insulation for Cladding Attachment in Commercial Exterior Walls

Rmax ECOMAXci® FR Ply is a Class A energy-efficient thermal insulation board composed of a closed-cell polyisocyanurate (polyiso) foam core with glass fiber reinforced aluminum facers on both sides bonded to 5/8” or 3/4” fire retardant treated plywood.

ECOMAXci® FR Ply has been tested per NFPA 285 and successfully passed. The NFPA 285 listing/approval is dependent on all components of the assembly. Third party evaluations and listings should also be consulted for specific instructions.


  • Exterior walls (Type I-IV)
  • Masonry walls
  • Steel stud walls
  • Fire-treated wood stud walls