Insulation

DuPont™ Styrofoam™ Brand Tongue & Groove XPS Insulation

Lightweight, Easy To Install Type IV XPS Foam Insulation

U.S. HFC Regulation Compliant Formulation

DuPont™ Styrofoam™ Brand Tongue & Groove Extruded Polystyrene (XPS) Insulation features tongue and groove edges on all four sides of 2’ x 8’ boards 1” thick or less and on the long edges of all other boards. The lightweight, moisture-resistant and thermally efficient Type IV extruded polystyrene foam insulation is suited for a wide range of residential and commercial construction applications.

Specifications

Standard Sizes

Thickness	Width	Length	R-Value	Edge Treatment
3/4 in.	2 ft.	8 ft.	3.8	Tongue and Grove Edge
1 1/2 in.	2 ft.	8 ft.	7.5	Tongue and Grove Edge
2 in.	2 ft.	8 ft.	10	Tongue and Grove Edge
3/4 in.	4 ft.	8 ft.	3.8	Tongue and Grove Edge Wide
1 in.	4 ft.	8 ft.	5	Tongue and Grove Edge Wide
1 1/2 in.	4 ft.	8 ft.	7.5	Tongue and Grove Edge Wide
2 in.	4 ft.	8 ft.	10	Tongue and Grove Edge Wide

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

Styrofoam^™ Brand Tongue & Groove XPS Insulation 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
UL 723	Test Method for Surface Burning Characteristics of Building Materials	Surface Burning Characteristics	Flame Spread ≤ 25 Smoke Developed ≤ 450
THERMAL
ASTM C518	Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus	Thermal Resistance per inch @ 75°F mean temp¹	5.0 ft² •h•°F/Btu, R-value, min.
ASTM D696	Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between −30°C and + 30°C with a Vitreous Silica Dilatometer	Coefficient of Linear Thermal Expansion	3.5 x 10-5 in/in•°F
ASTM D2126	Standard Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging	Change in Dimensions	2.0% change, max.
STRENGTH
ASTM D1621	Standard Test Method for Compressive Properties of Rigid Cellular Plastics	Compressive Strength²	25 psi, min.
ASTM C203	Standard Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation	Flexural Strength	50 psi, min.
WATER
ASTM C272	Standard Test Method for Water Absorption of Core Materials for Sandwich Construction	Water Absorption	0.1% by volume, max.
ASTM E96	Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials	Water Vapor Permeance³	1.5 perm, max.

¹Values are consistent with the criteria of ASTM C578 and the requirements of the FTC R-value rule (16 CFR Part 460). R means resistance to heat flow. The higher the R-value, the greater the insulating power.

²Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first. Since Styrofoam^™ Brand Extruded Polystyrene Foam Insulations are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep and fatigue deformation.

³Based on 1” thickness.

Code Compliance

Styrofoam^™ Brand Tongue & Groove XPS Insulation complies with the following codes:

Code	Description
US Product Listings & Verifications	International Residential Code (IRC) and International Building Code (IBC); see ICC-ES ESR-4755 Underwriters Laboratories, Inc. (UL) Classified, see Classification Certificate D-369 DrJ TER 1303-01 DrJ TER 1506-03 DrJ TER 2105-01
Regional Code Listings & Reports	California Std. Reg. #CA T1535