Duro-Last HD ISO Plus EPS - Manual (Page 2)

Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 11/4/2013
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DURO-GUARD ® HD ISO + EPS
Installation:
• Duro-Guard HD ISO + EPS may be used
directly under the Duro-Last membrane.
Care should be taken to ensure that “bare”
EPS is never in direct contact with the
membrane. Refer to the appropriate Duro-
Last specification for slip sheet and cover
board requirements.
• 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.
• Butt 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 or insulation adhesive. 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 and plates 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 also be attached with
insulation adhesive.
• Maximum panel dimensions are 4ft. x 4ft.
TABLE 3. TYPICAL PHYSICAL PROPERTIES
(Foam Core)
Property Test Method Type VIII
Density (nominal) ASTM C 303 1.25 pcf
R-Value
(per inch)
@25°F
@40°F
@75°F
ASTM C 518
or
C 177
4.55
4.25
3.92
Compressive Strength
(10% deformation)
ASTM D 1621 13 – 18 psi
Flexural Strength ASTM C 203 ≥ 30 psi
Dimensional Stability ASTM D 2126 ≤ 2.0%
Water Vapor Permeance ASTM E 96 ≤ 3.5 perm
Water Absorption ASTM C 272 ≤ 3.0%
Flame Spread ASTM E 84 20
Smoke Developed ASTM E 84 150 - 300
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”) and completely
covered with a weatherproof covering such as
a tarpaulin.
• Do not use panels which are wet or damaged.
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 THERMAL VALUES
THICKNESS R-Value*
(inches) (mm) TYPE VIII
1.50 38 8.8
2.00 51 10.9
2.50 64 13.0
3.00 76 15.1
3.50 89 17.2
4.00 102 19.3
4.50 114 21.4
5.00 127 23.5
5.50 140 25.6
6.00 152 27.7
* R-Value is calculated by adding the R-value of the cover
board and the R-value of Duro-Guard EPS Type VIII
together.