Specification

Code Compliances
TUFF-R™ and Super TUFF-R™
insulation products comply with the
following codes and standards:
• InternationalResidentialCode
(IRC) and International Building
Code (IBC); see ICC-ES ESR-
3089
• ASTMC1289TypeI
• Calif.Std.Reg.#CA-T383
Contact your Dow sales representa-
tive or local authorities for state and
local building code requirements
and related acceptances.
Installation
Boards of TUFF-R™ and Super
TUFF-R™ insulation are easy
to handle, cut and install. The
lightweight boards can be cut
with a knife or any sharp blade.
Contact a local Dow representative
or visit the literature library at
www.insulateyourhome.com for
more specific instructions.
Availability
TUFF-R™ and Super TUFF-R™
Polyisocyanurate Insulations are
available through an extensive
network of distributors and dealers.
For more information, call
1-800-232-2436.
Technical Services
Dow can provide technical
information to help address
questions when using TUFF-R™
and Super TUFF-R™ insulations.
Technical personnel are available at
1-866-583-BLUE (2583).
NOTICE: No freedom from any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for
determining whether products and the information in this document are appropriate for Customer's use and for ensuring that Customer's workplace and disposal practices are in compliance with applicable laws and other
government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made may not have been approved for use in all countries or
regions. Dow assumes no obligation or liability for the information in this document. References to “Dow” or the “Company” mean The Dow Chemical Company and its consolidated subsidiaries unless otherwise expressly noted.
NOWARRANTIESAREGIVEN;ALLIMPLIEDWARRANTIESOFMERCHANTABILITYORFITNESSFORAPARTICULARPURPOSEAREEXPRESSLYEXCLUDED.
NOTICE: Changes to the International Residential Code require the installation of a water-resistive barrier (WRB) within most exterior wall assemblies in residential construction. The following Dow insulated sheathing products
qualifyasaWRBwheninstalledaccordingtotheinstallationinstructionsdevelopedfor"installationoffoamsheathingasaweather-resistivebarrier":STYROFOAM™DURAMATE™Plus,STYROFOAM™ResidentialSheathing,
STYROFOAM™TongueandGroove,STYROFOAMSIS™,STYROFOAM™SquareEdge,STYROFOAM™ResidingBoard,DOW™HighPerformanceUnderlayment,THERMAX™Sheathing,TUFF-R™andSuperTUFF-R™and
therefore do not require the use of a building paper or a housewrap as a WRB. When a WRB is not needed, these Dow foam sheathings may be installed according to standard installation instructions for foam sheathing from
Dow. Be sure products and installation instructions meet code requirements for your particular location. Note: WEATHERMATE™ and WEATHERMATE™ Plus Housewraps have already qualified as water-resistive alternatives to
the prescribed felt (see Evaluation Reports NER-593 and NER-640 for approved alternative).
CAUTION: This product is combustible and shall only be used as specified by the local building code with respect to flame spread classification and to the use of a suitable thermal barrier. For more information, consult MSDS,
call Dow at 1-866-583-BLUE (2583) or contact your local building inspector. In an emergency, call 1-989-636-4400.
Building and/or construction practices unrelated to building materials could greatly affect moisture and the potential for mold formation. No material supplier including Dow can give assurance that mold will not develop in any
specific system.
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
Habitat for Humanity is a registered service mark owned by Habitat for Humanity International
Printed in U.S.A. Form No. 179-07932-1011MCK
www.insulateyourhome.com
FOR TECHNICAL INFORMATION: 1-866-583-BLUE (2583)
FOR SALES INFORMATION: 1-800-232-2436
THEDOWCHEMICALCOMPANY
DowBuildingSolutions•200Larkin•Midland,MI48674
a proud partner of
McKAY211339
Table 3: R-Values for TUFF-R
™
and Super TUFF-R
™
Polyisocyanurate Insulation
Nominal Foam Thickness, in. ProductR-Value
(1)(2)
3/8 2.0
1/2 3.3
5/8 4.1
3/4 5.0
1 6.5
(1) Product R-values @ 75°F mean temperature determined in accordance with ASTM C1289 and ASTM C236/C518 on
full-sized product.
(2) An additional R-2.77 (2.8) may be added to the system R-value when a minimum 3/4" ideal airspace and horizontal
heat flow are present in accordance with the ASHRAE Fundamentals Handbook and FTC, 16 CFR port 460.