Duro-Last EPS Fiberglass Facer - 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 ® EPS FIBERGLASS FACER
Installation:
• Duro-Guard EPS Fiberglass Facer 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 between layers a minimum of
6 inches 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:
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.
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
1.00 25 4.2
1.50 38 6.3
2.00 51 8.4
2.50 64 10.5
3.00 76 12.6
3.50 89 14.7
4.00 102 16.8
4.50 114 18.9
5.00 127 21
5.50 140 23.1
6.00 152 25.2
* Contact Duro-Last for additional thickness options.
TABLE 3. TYPICAL PHYSICAL PROPERTIES
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