Duro-Last ISO HD - Manual

Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 10/31/2013
DURO-GUARD
®
ISO HD
1 of 2 www.duro-last.com 800-248-0280
Figure 1. Duro-Guard ISO HD (Shown as Recover Board)
Description:
Duro-Guard ® ISO HD is a ½ inch thick high density
polyisocyanurate insulation panel specifically
designed for use as a cover/recover board. It is
manufactured on-line using premium performance
coated glass facers.
 R-value of 2.5 is significantly higher than roof
cover boards made of wood fiber or gypsum.
 Lightweight (11 lbs. per 4 ft. x 8 ft. panel).
 Easy to cut, handle and install.
 Manufactured with a blowing agent that has
zero ozone depletion potential (ODP) and
virtually no global warming potential (GWP).
 Recycled content > 8%.
 Compressive Strength > 90 psi.
 4 pcf density provides enhanced physical
properties.
 Passes ASTM Resistance to Mold Test.
 Refer to Table 1 for physical properties.
Recommended Uses:
 Mechanically attached Duro-Last ® roof
systems.
 Adhered/Fully Bonded Duro-Last roof systems.
 Duro-Bond
® roof systems.
 Metal retrofit roof systems.
Underwriters Laboratories, Inc. Classifications:
 Refer to Duro-Last’s UL Listings
(TGFU.R10128) for assembly details.
Factory Mutual Approvals:
 FM 4450, FM 4470.
 Refer to FM Approval’s RoofNav for details on
FM Approved systems (www.roofnav.com).
Flat Panels:
 Available size:
o 4 ft. x 8 ft.
o 4 ft. x 4 ft.
o Thicknesses: ½ inch.
Installation:
 In steel deck applications, Duro-Guard ISO HD
can only be used as a cover board over
insulation or as recover board over an existing
roof. It may be placed directly on flute filler in a
metal roof retrofit application assuming the
flutes are completely filled.
 Panels must be kept dry before, during and
after installation. Install only as much insulation
as can be covered the same day with
completed roofing.
 The use of multiple layers of insulation with
joints staggered a minimum of 6 inches
between layers is recommended to eliminate
thermal bridging.
 Abut panel edges together and stagger joints of
adjacent panels.
 Boards must be neatly fitted to roof deck and
around penetrations with no gaps greater than
¼ inch.
 Refer to the appropriate Duro-Last roof system
specification and detail drawings for deck
preparation and attachment requirements.
TABLE 1. PHYSICAL PROPERTIES – COVER BOARD
Compressive
Strength
ASTM D 1621 > 90 PSI
Dimensional
Stability
ASTM D 2126
< .5 % linear change
(7 days)
Water
Absorption
ASTM C 209 < 1% volume
Resistance to
Mold
ASTM D 3273 Passed
Service
Temperature
260° F (126° C) or less