Duro-Last ISO NB - Manual (Page 2)

Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 10/31/2013
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DURO-GUARD ® ISO NB
Installation:
 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.
 Precautions must be taken to ensure that new
concrete decks have fully hydrated and do not
continue to release moisture.
Panel Attachment:
 Panels may be attached to the roof deck using
mechanical fasteners, insulation adhesive or
hot bitumen. It is acceptable to use these
products in combination.
Mechanical Attachment
 When installing multiple layers (which may
include insulation, cover boards and thermal
barriers) it is acceptable to mechanically secure
through all layers.
 Use fasteners intended for use with this
product and that are supplied by or approved
by Duro-Last, Inc.
Adhesive Attachment
 Insulation adhesive must be supplied by Duro-
Last, Inc. Refer to the adhesive’s product data
sheet for application guidelines. Acceptable
products:
o Duro-Grip
® Insta-Stik™.
o Duro-Grip Olybond
® .
o Duro-Grip Millenium Weather-Tite
® .
o Duro-Grip CR-20.
 Subsequent layers of insulation and approved
cover boards may be attached with insulation
adhesive.
 Maximum panel dimensions are 4 ft. x 4 ft.
Hot Bitumen Attachment
 When using hot bitumen on concrete decks,
priming is necessary.
 Temperature of the bitumen shall be
approximately 50° F below the inter-ply hand
mopping EVT.
 The deck shall be dry and care must be taken
to apply the bitumen in sufficient quantity to
totally cover the available deck surface.
 To ensure embedment, the board shall also be
“stepped in” at several points while the bitumen
is still hot enough to allow positive attachment.
 Maximum panel dimensions are 4 ft. x 4 ft.
 Any roof membrane contaminated with bitumen
must be replaced.
Storage:
 Insulation must be protected from open flame
and kept dry at all times.
 Factory applied packaging is intended only for
protection during transit. Slit or remove the
packaging to prevent accumulation of
condensation.
 Store elevated (at least 3 inches) and
completely covered with a weatherproof
covering such as a tarpaulin.
 Do not use panels which are wet or damaged.
 Refer to PIMA Technical Bulletin No. 109:
Storage and Handling Recommendations for
Polyiso Roof Insulation for additional guidelines
(www.pima.org).
Limitations:
 Duro-Last, Inc. will not be responsible or liable
for any defects or problems related to building
or roof design by others, to deficiencies in
construction, to dangerous conditions on the
job site, or to improper storage, handling or
installation by others.
TABLE 2. TYPICAL PHYSICAL PROPERTIES (FOAM CORE)
Compressive
Strength
ASTM D 1621
ASTM C 1289
Grade 2
20 psi
(138 kPa)
Grade 3
25 psi
(172 kPa)
Dimensional
Stability
ASTM D 2126
2% linear change
(7 days)
Moisture Vapor
Transmission
ASTM E 96
< 1 perm
(57.5 ng/Pa·s·m 2 )
Water
Absorption
ASTM C 209 < 1% volume
Service
Temperature
-100° to 250° F
(-73° to 122° C)