DuPont™ Thermax™ Sheathing Insulation
Nonstructural, Glass-Fiber-Infused Rigid Polyiso Insulation
DuPont™ Thermax™ Sheathing Insulation
Nonstructural, Glass-Fiber-Infused Rigid Polyiso Insulation
<br><b>DuPont™ Thermax™ Sheathing Polyisocyanurate Insulation</b> is a non-structural, rigid board insulation consisting of a glass-fiber-infused polyisocyanurate foam core laminated between 1 mil smooth, reflective aluminum facers on both sides. The glass-fiber reinforcement contributes to improved fire performance and dimensional stability. <br><br> <b>Thermax™ Sheathing Insulation</b> also offers high, long-term thermal resistance, with facers that help prevent water and water vapor intrusion into the insulation foam allowing it to stabilize at a higher R-value. In the USA, Thermax™ Sheathing can be installed as exterior continuous insulation and also installed exposed to the interior without a thermal barrier. Used in conjunction with the appropriate joint closure system for the application, Thermax™ Sheathing – with its low perm rating – can help to reduce moisture condensation within and behind the insulation.
Resources
Product Information Sheets Installation Guides Brochure Fire Performance Warranty
Features & Benefits
Fire Performance
- Approved for use in NFPA 285 compliant assemblies per CCRR-0435 valid engineering judgement reports.
- Can be installed on walls or ceilings while exposed to the interior without any thermal barrier per NFPA 286.
- FM 4880 approved up to 3” (walls only).
Durability and Thermal Performance
- R-Value of 6.9 at 1" thickness.
- Contains UV-stable technology and can remain uncovered up to three months.
- Reduces the potential for condensation within the wall assembly.
- Enhanced dimensional stability from glass-fiber reinforced core.
- Meets IBC and ASHRAE requirements for continuous insulation.
Air and Water-Resistive Barrier Performance
- Can serve as an air and water-resistive barrier (WRB) when the joints are treated with DuPont™ LiquidArmor™ QS or LiquidArmor™ LT.
Specifications
Standard Sizes
Note: Please be advised that additional sizes may be available. Availability of all sizes varies by region and is subject to change. For further information, please contact your local DuPont Sales Representative or call us at 1-866-338-7668.
Testing
<b>Thermax™ Sheathing Insulation</b> exhibits the properties and characteristics indicated in the table below when tested as represented. Review all instructions and (Material) Safety Data Sheet ((M)SDS) before use. Please contact DuPont at 1-833-338-7668 when additional guidance is required for writing specifications that include this product.
Smoke Developed ≤ 450
Core and Finished Product
1Calculated flammability values for this or any other material are not intended to represent hazards that may be present under actual fire conditions.
2See Jensen Hughes engineering judgement
3R-value of 1.0-inch of foam measured @ 75°F mean temperature, determined in accordance with ASTM C518 after aging for 90 days @ 140°F.
4Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first.
Code Compliance
<b>Thermax™ Sheathing Insulation</b> complies with the following codes:
FAQ
Can DuPont™ Thermax™ Brand Insulation be left exposed to the building interior? Thermax™ Brand Insulation products can be left exposed to the building interior (i.e., without a thermal barrier such as 1/2 inch gypsum wallboard) in specific non-rated ceiling assemblies or non-rated construction in commercial, industrial and agricultural buildings. Thermax™ Brand Insulation products cannot be left exposed to exterior conditions.
The use of Thermax™ Brand Insulation exposed to the building interior is documented with a Code Compliance Research Report (CCRR-0440).
NOTE: Thermax™ cannot be used as a duct work or plenum insulation- it does not meet the IBC /IMC for flame spread of 25 or less and smoke developed of 50 or less
How much does DuPont™ Thermax™ Sheathing Insulation weigh? 0.15 lb/ft2
To get weight of 1 inch x 4 feet x 8 feet board multiple the value by 32
Example: Thermax™ Sheathing Insulation 1in x 4ft x 8ft weighs (0.15 x 32) = 4.8 lbs What are the ASTM C1289 classifications for DuPont polyisocyanurate products ? The ASTM C1289 classifications for DuPontpolyisocyanurate products are as shown below:
Type1 - Faced with aluminum foil on both major surfaces of the core foam. Class 1 - Non-reinforced core foam. Class 2 - Glass fiber reinforced core foam. Dimensional stability will be greater than Class 1 when fastened properly. ASTM C1289 Class 2 exceeds Class 1 requirements.
What are the fastening requirements to secure DuPont™ Thermax™ Sheathing Insulation in a standing seam metal roof application? To meet the appropriate wind uplift criteria, please contact the Standing Seam Roof Manufacturer for proper fastener type and fastening pattern. With Thermax™ insulation boards, a general guideline is to use a minimum of 5-8 fasteners with roof plates (to offset loading) penetrating 3/4' into framing or substrate. If the Thermax™ insulation is exposed to the interior of the building and is FM insured, consult with DuPont Building Knowledge Center (BKC) for latest FM approval.