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®
DURO-GUARD EPS FAN FOLD

Description:
®
Duro-Guard EPS Fan Fold is manufactured with a
rigid expanded polystyrene (EPS) core and wrapped
with tough facers which create a durable water-
resistant board. EPS is a closed cell foam which is
highly resistant to heat flow and moisture penetration.
The film facers are compatible with all roof
®
membranes offered by Duro-Last , Inc.
 Use as a recover board over:
o Granulated or smooth cap sheets.
o Smooth built-up roof systems.
o Aggregate surfaced built-up roofs (3/8 inch
aggregate, max.). Figure 1. Duro-Guard EPS Fan Fold
o Aged coal tar pitch roof systems.
o Single-ply membranes.
 Inert, non-nutritive, and highly stable. TABLE 1. TYPICAL PHYSICAL PROPERTIES
 Contains no CFCs, HCFCs, HFCs or Property Test Method Type VIII
formaldehyde.
 Superior moisture resistance. Density (nominal) ASTM C 303 1.25 pcf
ASTM C 518
 Type VIII, 1.25 pcf, per ASTM C 578. Thermal Resistance, or 2
 Refer to Table 1 for physical properties. R-Value (per Inch) C 177 1.9 °F·ft ·hr/Btu
at 75° F
Uses: Compressive Strength ASTM D 1621 13 psi
(10% deformation)
 Mechanically attached Duro-Last roof systems.
Flexural Strength ASTM C 203 ≥ 30 psi
Underwriters Laboratories Inc.: Water Vapor ASTM E 96 < 1.0 perm
Permeance
 Refer to Duro-Last’s UL Listings Water Absorption ASTM C 272 < 1.0%
(TGFU.R10128) for assembly details
(www.ul.com). Flame Spread ASTM E 84 20
Smoke Developed ASTM E 84 150 - 300

Board Dimensions and Weight:

 1/2 inch thick.
 4 ft. x 50 ft.
 200 square-foot coverage.
 Fan-folded every 2 ft. creating easy to handle
bundles measuring 2 ft. x 4 ft. x 9 inches thick.
 11 pounds per board.

Figure 2. Duro-Guard EPS Fan Fold Dimensions

www.duro-last.com 1 of 2 800-248-0280
Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
Created: 01/17/2012 Revised: 03/19/2013, 11/04/2013, 12/04/2013, 05/04/2015