STYROFOAM SIS™ Brand Structural Insulated Sheathing
STYROFOAM™ SIS™ Installation Recommendations
STYROFOAM SIS Sell Sheet (280KB PDF)
STYROFOAM SIS Product Information Sheet (81KB PDF)
STYROFOAM SIS Installation Information Sheet (252KB PDF)
STYROFOAM SIS 15-Year Limited Thermal Warranty (69KB PDF)
STYROFOAM SIS Brand Structural Insulated Sheathing combines structural shear bracing, insulation and water-resistive barrier properties in one solution. This sheathing can be used as braced wall panels integrated with other rigid insulated sheathing. It can also serve as continuous structural insulated sheathing on the entire braced wall line. STYROFOAM™ SIS™ Brand sheathing provides high R-value and eliminates the need for OSB, wood let-in bracing or metal T-bracing. It also helps lower the installed cost because it allows the builder to install structural support, insulation and water-resistive barrier in "one trip around the house".
| Nominal Board Thickness** |
R-Value† |
Board Size |
Edge Treatment |
Min Compressive Strength†† |
| .5" |
3.0 |
4' x 8',
4' x 9',
4' x 10' |
Butt Edge |
20 psi |
| 1.0" |
5.5 |
4' x 8',
4' x 9',
4' x 10' |
Butt Edge |
20 psi |
†Stabilized R-values of core foam @ 75°F mean temperature determined in accordance with ASTM C518. R-values expressed in ft2•h•°F/Btu.
††Vertical compressive strength is measured at 10 percent deformation or yield, whichever occurs first.
