With its unique fiberglass reinforced foam core, Thermax™ (ci) Exterior Insulation delivers one of the highest R-values available for immediate insulation and weather protection on the job site.
DuPont™ Thermax™ (ci) Exterior Foam Insulation is a rigid board insulation consisting of a glass-fiber-reinforced polyisocyanurate foam core faced with nominal 1.25 mil embossed BLUE™ thermoset-coated aluminum on one side and 0.9 mil smooth, reflective aluminum on the other. Designed for continuous insulation, Thermax™ (ci)’s foam core is homogenous – featuring finer cell size and better cell orientation, reducing wormholes and knit lines – resulting in one of the highest R-values available (R-6.5 at 1”) for immediate insulation and weather protection on the job site, as well as long-term thermal performance.
|Easy to cut, handle, and install||
|Thermal Resistance1||ASTM C518||R-value, min||6.5|
|Compressive Strength2||ASTM D1621||psi, min.||25|
|Water Absorption||ASTM C209||% by volume, max.||0.1|
|Water Vapor Permeance3||ASTM E96||perm, max||<0.04|
|Maximum Use Temperature||-||°F||250|
|Flexural Strength||ASTM C203||psi, min.||55|
|Flame Spread||ASTM E84||-||25|
|Smoke Developed||ASTM E84||-||<450|
1 Aged R-value at 1” of cured foam @ 75°F mean temperature. R-value expressed in ft2 •h•°F/Btu. R-value determined by ASTM C518 using the aging process in ASTM C1289 (90 days @ 140°F).
2 Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first.
3 Calculated flammability values for this or any other material are not intended to represent hazards that may be present under actual fire conditions.
|Thickness (in.)||R-Value||Board Size (ft.)||Edge Treatment|
|0.625||4.1||4 x 8, 4 x 12||Square Edge|
|1.0||6.5||4 x 8, 4 x 12||Square Edge|
|1.55||10.1||4 x 8, 4 x 12||Shiplap|
|2.0||13.0||4 x 8, 4 x 12||Shiplap|