Rmax Thermasheath®-SI
Structural Insulation for Exterior Walls

Thermasheath®-SI is a composite product made up of energy-efficient insulation and a structural component and is designed to work seamlessly with non-structural Rmax Thermasheath®-3. The insulation component is a closed-cell polyiso foam bonded to reflective, reinforced aluminum facers. The structural component is a board made up of pressure laminated plies of cellulosic fibers specially treated with a water-resistant adhesive.

Thermasheath®-SI is suitable for use in residential wood stud construction. Furthermore, with 1/2” interior gypsum, it is designed to be a one-to-one substitute for wood sheathing in shear wall resistance.

 
Rmax Thermadheath-SI Compliances

CONSTRUCTION APPLICATIONS

  • Wood frame construction
  • Brick veneer
  • Stone  
  • Stucco
  • Wood
  • Vinyl siding
  • Aluminum siding
  • Cement board siding 
                            Brick Veneer or Stone Construction

                            Brick Veneer or Stone Construction


THERMAL PROPERTIES

1Thermal values are for the Polyiso foam portion only and are determined by using ASTM C518 test method at 75°F mean temperature on material conditioned according to PIMA Technical Bulletin No. 101. 

1Thermal values are for the Polyiso foam portion only and are determined by using ASTM C518 test method at 75°F mean temperature on material conditioned according to PIMA Technical Bulletin No. 101. 

TYPICAL PHYSICAL PROPERTIES

1Flame spread numbers are shown for comparison purposes only and are not intended to represent the performance of Thermasheath®-SI and related components under actual fire conditions. 

1Flame spread numbers are shown for comparison purposes only and are not intended to represent the performance of Thermasheath®-SI and related components under actual fire conditions.