DuPont™ Thermax™ White Finish NH Insulation

Non-Halogenated (NH), Embossed White Acrylic Coated, Glass-Fiber Reinforced Polyiso Foam Insulation

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DuPont™ Thermax™ White Finish NH Insulation

Non-Halogenated (NH), Embossed White Acrylic Coated, Glass-Fiber Reinforced Polyiso Foam Insulation

<br /><b>DuPont™ Thermax™ White Finish NH Polyisocyanurate Insulation</b> is designed for use as both an insulation and interior finish system. It is suitable for interior masonry or concrete walls, as well as walls and ceilings in metal, wood post frame, and concrete or masonry buildings, adhering to building code requirements. <br /><br /> <b>Thermax™ White Finish NH Insulation</b> features a glass-fiber-reinforced polyisocyanurate foam core, with one side faced with 1.25 mil embossed white acrylic-coated aluminum and the other with 0.9 mil smooth aluminum. The white embossed surface is aesthetically pleasing and easy to clean, capable of withstanding pressure washing up to 1,000 psi. It also meets USDA requirements for incidental food contact when used on surfaces like floors, walls, and ceilings. <br /><br /> Thermax™ Brand Insulations are manufactured using an exclusive free-rise process, resulting in a closed-cell foam with enhanced fire performance. This foam core, combined with durable facers, provides high R-value, excellent dimensional stability, and moisture resistance. When paired with the appropriate joint closure system, <b>Thermax™ White Finish NH Insulation's</b> low perm rating effectively prevents moisture condensation within and behind the insulation.
 
 
 
 
 
 

Features & Benefits 

 
 
 
 
 
 

Specifications

 
 
 

Standard Sizes

Thickness Width Length R-Value Edge Treatment
0.5 in. 4 ft. 8 ft. 3.6 Square Edge
0.75 in. 4 ft. 8 ft. 5.1 Square Edge
1.0 in. 4 ft. 8 ft. 6.6 Square Edge
1.55 in. 4 ft. 8 ft. 10.0 Square Edge, Shiplap
2.0 in. 4 ft. 8 ft. 13.0 Square Edge, Shiplap
2.5 in. 4 ft. 8 ft. 16.0 Square Edge
3.0 in. 4 ft. 8 ft. 18.5 Square Edge, Shiplap
3.25 in. 4 ft. 8 ft. 20.0 Square Edge, Shiplap

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™ White Finish NH 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.

TEST METHOD TEST TITLE PROPERTY RESULTS
FIRE
ASTM E84 Standard Test Method for Surface Burning Characteristics of Building Materials Surface Burning Characteristics1 Flame Spread ≤ 25
Smoke Developed ≤ 450
Core and Finished Product
UL 1715 Standard for Safety Fire Test of Interior Finish Material Fire Progagation - Interior Pass
NFPA 285 Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Wall Assemblies Containing Combustible Components Fire Progagation - Exterior2 Pass
NFPA 286 Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth Fire Progagation - Interior Pass
NFPA 268 Standard Test Method for Determining Ignitability of Exterior Wall Assemblies Using a Radiant Heat Energy Source Ignitabiilty - Exterior Pass
THERMAL
ASTM C518 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus Thermal Resistance 1 inch @ 75°F mean temp3 6.6 ft2
•h•°F/Btu, R-value, min.
ASTM D2126 Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging Dimensional Stability 0.2% linear (length & width)
STRENGTH
ASTM D1621 Standard Test Method for Compressive Properties of Rigid Cellular Plastics Compressive Strength4 20 psi
ASTM C203 Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation Flexural Strength 50 psi
ASTM D1623 Standard Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics Tensile Strength 500 psf, min.
AIR
ASTM E2178 Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials Leakage rates less than 0.0001 L/s/m2
at a test pressure of 75 Pa.
Pass
ASTM E2357 Standard Test Method for Determining Air Leakage Rate of Air Barrier Assemblies Air Leakage No Leakage
WATER
ASTM E96 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials Water Vapor Permeance. 0.01 perm
ASTM C209 Standard Test Methods for Cellulosic Fiber Insulating Board Water Absorption 0.1% volume, max.
ASTM E331 Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference Water Penetration Pass

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.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

FAQ

Is there a paint color formulation to match DuPont™ Thermax™ Brand Insulation white acrylic-embossed insulation boards (DuPont™ Thermax™ White Finish NH Insulation, DuPont™ Thermax™ Light Duty NH Insulation and DuPont™ Thermax™ Heavy Duty Insulation)?
Yes. Customers from anywhere in the United States can obtain the paint color match for Thermax™ white acrylic-embossed insulation boards at any Sherwin-Williams paint store nationwide. No primer is required, and usually one coat will be sufficient; however, two coats also appear satisfactory. Apply the paint with brush, roller or spray.

Ask for: 1. Sherwin-Williams DTM Acrylic Coating B66 W1151 Semi Gloss Extra White 650827181 2. PPG High Performance Coatings: PITT-TECH® PLUS SG 4216 HP White Base

How much weight in terms of fiberglass or blown-in cellulose can a 4' x 8' x 1' DuPont™ Thermax™ White Finish NH Insulation Insulation board support when fastened at:

4' roof purlins? 5' roof purlins? 8' roof purlins?

The weight of fiberglass or blown-in cellulose that Thermax™ White Finish Polyisocyanurate Insulation can support is:

• Fastened at 4' roof purlins: 3.5 lbs/sq ft @ 1' and 6.5 lbs/sq ft @ 2' thick • Fastened at 5' roof purlins: 2.1 lbs/sq ft @ 1' and 4.8 lbs/sq ft @ 2' thick • Fastened at 8' roof purlins: 0.2 lbs/sq ft @ 1' and 1.1 lbs/sq ft @ 2' thick

All boards were tested with 5 fasteners across the width at each purlin spacing, typically using a fastener long enough to penetrate the rafter or truss 3/4' and having a plastic 1.25' diameter washer on the fastener.

All testing was done at Center for Applied Engineering as Uniform Load Testing.

The weight for Thermax™ White Finish Polyisocyanurate Insulation is: •1/2' board weighs 3.6 lbs •1' board weighs 6.0 lbs •2' board weighs 11.0 lbs

Can DuPont™ Thermax™ White Finish NH Insulation be left exposed in walls and roofs in US?
Yes. Thermax™ White Finish NH Insulation has successfully passed the Factory Mutual Standard 4880 (Class 1 Insulated Wall or Wall & Roof/Ceiling Panels; Plastic Interior Finish Materials; Plastic Exterior Building Panels; Wall/Ceiling Coating Systems; Interior or Exterior Finish Systems) Class 1 Fire-Rated to maximum 30' high, 4.25” thick, 4’ width when installed as described in the current edition of FMRC approval guide. It is also considered a Class 1 foam plastic per ASTM E84 with a Flame Spread Index of 25 or less and a Smoke Developed Index of 450 or less.
How much does DuPont™ Thermax™ White Finish NH Insulation weigh?
0.187 lb/ft2
To get weight of 1 inch x 4 feet x 8 feet board multiple the value by 32
Example: Thermax™ White Finish NH Insulation 1in x 4ft x 8ft weighs (0.187 x 32) = 5.98 lbs
Is DuPont™ Thermax™ White Finish NH Insulation insect resistant?
No. Thermax™ White Finish NH Insulation does not have any additives in it to make it insect-resistant. However, covering the exposed edges of the foam with aluminum foil tape, along with regular pest control around the perimeter of the building, can reduce insect infestation.
Can DuPont™ Thermax™ Brand Insulation be used in an air plenum?
DuPont™ Thermax™ Sheathing Insulation and DuPont™ Thermax™ White Finish NH Insulation may be able to be installed in an air plenum application covered with an appropriate thermal barrier.

Air plenums have a strict definition in the International Mechanical Code. For instance, the area above a drop ceiling that is a dead air space, with no intended air flow, would not be considered an air plenum. This would be considered a 'concealed space' and foam would have to meet a flame spread/smoke developed (FS/SD) requirement ≤25/450. There can be air ducts running through this space and it is still not considered an air plenum. Once the space is designed such that air is intended to move through it, it becomes an air plenum. In some cases the HVAC design uses the space above the drop ceiling to move air, frequently in the return mode. This space would then be an air plenum and have to meet all codes for air plenums such as meeting an FS/SD requirement of ≤25/50. Thermax™ Sheathing and white acrylic-coated Thermax™ Insulation/finish boards do not meet this FS/SD requirement.

What are the joint treatment options for installing DuPont™ Thermax™ White Finish NH Insulation?
DuPont offers several board joint treatment options when installing Thermax™ White Finish NH Insulation, including standard white-coated aluminum foil tape, ship lapped edges (board thickness must be greater than 1.5' to achieve proper lip edges), PVC clip strip, PVC J-channel and PVC interlocking system. In roof systems where the temperature of the roof exceeds 150°F, it is recommended to use two layers of Thermax™. First (closest to roof panel) should be Thermax™ Sheathing. Then (exposed to interior) would be Thermax™ White Finish NH Insulation. Board joints should be staggered between the layers. Use of white tape or the Clip Strip will provide the ideal look and finish.

The board joints should be cleaned (via wiping and drying) prior to installing white tape, and a stiff bristle brush should be applied to bond tape to embossed surface of Thermax™ White Finish NH Insulation.

NOTE: if using Thermax™ on concrete wall or Tilt Up wall a good construction practice is to apply 3 beads (3/8 inch bead) of sealant or caulking behind the boards (top - middle - bottom) to prevent moisture migration occurring behind the boards.

What are the ASTM C1289 classifications for DuPont polyisocyanurate products ?
The ASTM C1289 classifications for DuPontpolyisocyanurate products are as shown below:
ASTM C1289 Types Products
Type I, Class I Tuff-R™ Insulation (< 1')
Type I, Class 2 Tuff-R™ Insulation (≥ 1')
Type I, Class 2 Thermax™ Basic NH Insulation
Type I, Class 2 Thermax™ Heavy Duty Insulation
Type I, Class 2 Thermax™ Light Duty NH Insulation
Type I, Class 2 Thermax™ XARMOR™ (ci) Exterior Insulation
Type I, Class 2 Thermax™ Metal Building Board NH Insulation
Type I, Class 2 Thermax™ White Finish NH Insulation

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.

Does DuPont™ Thermax™ White Finish NH Insulation have USDA allowance for the white surface?
The white facer (1.25 mil embossed white acrylic) on both Thermax™ White Finish and DuPont™ Thermax™ Light Duty Insulation meets FDA 21 CFR acceptance..

For more information, please contact the DuPont Contact Center (DCC) by calling 1-833-338-7668.

Can DuPont™ Thermax™ White Finish NH Insulation be washed with a spray/power washer?
Yes. The following table outlines the conditions under which these Thermax™ Brand products can be power washed.

Allowable Spray Pressure, psi (MPa) Thermax™ White Finish Thermax™ Light Duty Thermax™ Heavy Duty
1000 (6.9) Any spray tip greater than 15 degrees, 3 feet minimum distance from the surface Any spray tip greater than 15 degrees, 3 feet minimum distance from the surface Any spray tip15 degrees, 3feetminimum distance from the surface
2000 (13.8) Not Allowed Not Allowed Any spray tip greater than 15 degrees, 3 feet minimum distance from the surface
Caution: Prolonged spray at board joints will cause facer to become disbonded from the insulation board. Always point nozzle perpendicular to board surface no closer than the minimum distance.

 
 
 
 
 
 

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