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DURO-GUARD ISO HD Composite
Installation:
Panels must be kept dry before, during and TABLE 2. PHYSICAL PROPERTIES – COVER BOARD
after installation. Install only as much insulation Compressive Strength ASTM D 1621 100 PSI
as can be covered the same day with < .5 % linear change (7
completed roofing. Dimensional Stability ASTM D 2126 days)
The use of multiple layers of insulation with Water Absorption ASTM C 209 < 1% volume
joints staggered a minimum of 6 inches
between layers is recommended to eliminate Resistance to Mold ASTM D 3273 Passed (10)
thermal bridging. Service Temperature 260° F (126° C) or less
Abut panel edges together and stagger joints of
adjacent panels.
TABLE 3. PHYSICAL PROPERTIES – DURO-GUARD ISO III
Boards must be neatly fitted to roof deck and
20 psi
around penetrations with no gaps greater than ASTM D 1621 Grade 2 (138 kPa)
¼ inch. Compressive Strength 25 psi
ASTM C 1289 Grade 3
Refer to the appropriate Duro-Last roof system (172 kPa)
specification and detail drawings for deck Dimensional Stability ASTM D 2126 2% linear change
(7 days)
preparation and attachment requirements.
Moisture Vapor ASTM E 96 < 1 perm
2
Precautions must be taken to ensure that new Transmission (85.0 ng/Pa·s·m )
concrete decks have fully hydrated and do not Water Absorption ASTM C 209 < 1% volume
continue to release moisture.
Service Temperature -100° to 250° F
Panel Attachment: (-73° to 122° C)
Panels may be attached to the roof deck using
mechanical fasteners, insulation adhesive or The deck shall be dry and care must be taken
hot bitumen. It is acceptable to use these to apply the bitumen in sufficient quantity to
products in combination. totally cover the available deck surface.
Mechanical Attachment To ensure embedment, the board shall also be
“stepped in” at several points while the bitumen
When installing multiple layers (which may is still hot enough to allow positive attachment.
include insulation, cover boards and thermal
barriers) it is acceptable to mechanically secure Maximum panel dimensions are 4 ft. x 4 ft.
through all layers. Any roof membrane contaminated with bitumen
Use fasteners and plates supplied by or must be replaced.
approved by Duro-Last, Inc. Storage:
Adhesive Attachment
Insulation must be protected from open flame
Insulation adhesive must be supplied by Duro- and kept dry at all times.
Last, Inc. Refer to the adhesive’s product data Factory applied packaging is intended only for
sheet for application guidelines. Acceptable protection during transit. Slit or remove the
products: packaging to prevent accumulation of
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o Duro-Grip Insta-Stik . condensation.
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o Duro-Grip Olybond . Store elevated (at least 3 inches) and
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o Duro-Grip Millenium Weather-Tite . completely covered with a weatherproof
o Duro-Grip CR-20. covering such as a tarpaulin.
Subsequent layers of insulation and approved Do not use panels which are wet or damaged.
cover boards may be attached with insulation Refer to PIMA Technical Bulletin No. 109:
adhesive. Storage and Handling Recommendations for
Maximum panel dimensions are 4 ft. x 4 ft. Polyiso Roof Insulation for additional guidelines
(www.pima.org).
Hot Bitumen Attachment
When using hot bitumen on concrete decks, Limitations:
priming is necessary. Duro-Last, Inc. will not be responsible or liable
Temperature of the bitumen shall be for any defects or problems related to building
approximately 50° F below the inter-ply hand or roof design by others, to deficiencies in
mopping EVT. construction, to dangerous conditions on the
job site, or to improper storage, handling or
installation by others.
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Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 10/31/2013