How to Guide

STYROFOAM Brand DURAMATE Plus
Extruded Polystyrene Foam Insulation
UNITED STATES . PRODUCT INFORMATION . RESIDENTIAL
* To qualify as a water-resistive barrier, must be installed according to the installation instructions developed for installation of foam sheathing as a water-resistive barrier on www.dowbuildingsolutions.com
®
™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
Product Name
STYROFOAM™ Brand
DURAMATE™ Plus Extruded
Polystyrene Foam Insulation
Manufacturer
The Dow Chemical Company
Dow Building Solutions
200 Larkin
Midland, MI 48674
1-866-583-BLUE (2583)
Fax 1-989-832-1465
www.dowbuildingsolutions.com
Product
Description
STYROFOAM™ Brand
DURAMATE™ Plus Extruded
Polystyrene Foam Insulation is
a tough extruded polystyrene
insulation board designed for
residential home construction. This
extra-strong, rigid and moisture-
resistant product is designed to
meet the performance requirements
of the industry.
Applications
STYROFOAM™ Brand
DURAMATE™ Plus Extruded
Polystyrene Foam Insulation is
particularly suitable for applications
where the foam sheathing is
fastened to frame walls.
Some key features and benefits
of STYROFOAM™ Brand
DURAMATE™ Plus Insulation
include:
• Durability:technologyforstiffness
plus extra-strong film facers to
resist damage and thereby reduce
waste on the job site
• MoistureResistance:closed-cell
foam core with plastic facers
• Lightweight:easytohandle
• StudFinders:fast,accurate
installation
• Attachment:canbeattached
using industry-accepted fasteners
• STYROFOAM™Brand
DURAMATE™ Plus Insulation can
be installed as a water-resistive
barrier*
SIZES
Square-edge boards of
STYROFOAM™ Brand
DURAMATE™ Plus Insulation are
available in nominal 1/2" thickness
in both 4' x 8' and 4' x 9' board
sizes.
PHYSICAL PROPERTIES
STYROFOAM™ Brand
DURAMATE™ Plus Insulation
features the exceptional water
resistance properties of all
STYROFOAM™ Brand Insulation
products. The unique closed cell
structure of STYROFOAM™ Brand
Insulation helps resist moisture.
Table 1: Features and Benefits of STYROFOAM
Brand
DURAMATE
Plus Extruded Polystyrene Foam Insulation
FEATURE BENEFIT
High, long-term R-value** Enhances thermal efficiency, reducing energy cost
High compressive strength,
extra-strong facers Resist damage, reducing job site waste
Closed-cell foam Resists moisture in all forms, including water vapor
Printed stud finders Enable fast, accurate installation
Table 2: Physical Properties of STYROFOAM
Brand
DURAMATE
Plus Extruded Polystyrene Foam Insulation
PROPERTY AND TEST METHOD VALUE
Thermal Resistance
(1)
at nominal 1/2", ASTM C518 @ 75°F mean
temp., ft
2
•h•°F/Btu,min.,R-value** 3.0
Compressive Strength
(2)
, ASTM D1621, psi, min. 15
Water Absorption, ASTM C272, % by volume, max. 0.3
Dimensional Stability
(3)
, ASTM D2126, % linear change, max. 2.0
(1)
R-values are consistent with criteria of ASTM C578 and requirements of FTC R-value rule (16 CFR Part 460).
(2)
Vertical compressive strength is measured at 10 percent deformation or yield, whichever occurs first.
(3)
Based on 1" thickness.
**R means resistance to heat flow. The higher the R-value the greater the insulating power.
Wood Studs
Drywall
Insulation in Stud Cavity
STYROFOAM™ Brand
DURAMATE™ Plus Insulation
(Installed as a water-resistive
barrier)
Vinyl Siding

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