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®
DURO-GUARD XPS FAN FOLD – A

(HYBRID CRUSH/CUT FOLD)

Description:
®
Duro-Guard XPS Fan Fold – A is manufactured with
a rigid extruded polystyrene (XPS) core and wrapped
with tough facers which create a durable water-
resistant board. XPS 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.).
o Aged coal tar pitch roof systems. Figure 1. Duro-Guard XPS Fan Fold – A
o Single-ply membranes.
 Inert, non-nutritive, and highly stable.
 Contains no CFCs, HCFCs, formaldehyde or TABLE 1. TYPICAL PHYSICAL PROPERTIES
VOC ozone depleting gases.
 Superior moisture resistance. Property Test Method Type VIII
 Type VIII, 1.25 pcf, per ASTM C 578. Density (nominal) ASTM C 303 1.25 pcf
 Refer to Table 1 for physical properties. Thermal Resistance, ASTM C 518 1.5 °F·ft ·hr/Btu
2
R-Value (per Inch) at 75° F
Uses: Compressive Strength ASTM D 1621 15 psi
(10% deformation)
 Mechanically attached Duro-Last roof systems. Water Vapor
Permeance ASTM E 96 0.06 perm
Underwriters Laboratories Inc.:
Water Absorption ASTM C 272 0.6%
 Refer to Duro-Last’s UL Listings Flame Spread ASTM E 84 10
(TGFU.R10128) for assembly details
(www.ul.com). Smoke Developed ASTM E 84 200

Board Dimensions and Weight:
 3/8 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.
 15 pounds per board.

Figure 2. Duro-Guard XPS Fan Fold – A 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