STURDY-R
Existing Walls -Installing STYROFOAM™ Residing Board, Residential Sheathing, Tongue & Groove, DURAMATE™ Plus, TUFF-R™, Super TUFF-R or STURDY-R™
Foam Over OSB-Installing STYROFOAM Residential Sheathing, Tongue & Groove, DURAMATE Plus, TUFF-R, Super TUFF-R, THERMAX™ or STURDY-R
Foam Over Studs -Installing STYROFOAM Residential Sheathing, Tongue & Groove, DURAMATE Plus, TUFF-R, Super TUFF-R, THERMAX or STURDY-R
STURDY-R Product Information (69KB PDF)
STURDY-R™ polyisocyanurate insulation is a patented high-performance foam core with proprietary fiber glass facers. It is recommended for wall sheathing in residential applications. STURDY-R is very tough and durable, reducing damage to the insulation boards on the job site.
| Nominal Board Thickness** |
R-Value†,1 |
Board Size |
Edge Treatment |
Min Compressive Strength††† |
| 0.5" |
2.5 |
4' x 8'/4' x 9' |
Square Edge |
25 psi |
| 0.59" |
3 |
4' x 8'/4' x 9' |
Square Edge |
25 psi |
| 0.75" |
4.0 |
4' x 8'/4' x 9' |
Square Edge |
25 psi |
| 1.0" |
5 |
4' x 8'/4' x 9' |
Square Edge |
25 psi |
Building Code Compliance
Complies with ASTM C1289 Type II, Class 2. Meets IBC/IRC requirements for foam plastic insulation. NES NER 540.
**Not all product sizes are available in all regions.
†R means resistance to heat flow. The higher the R-value, the greater the insulating power. R-values are expressed in ft2•h•°F/Btu.
†††Vertical compressive strength is measured at 10% deformation or at yield, whichever occurs first.
1 R-value determine by ASTM C518
Not available in all areas. Available in the East and in Colorado and New Mexico.
