Product Brochure

Precautions & Limitations
Code Compliance
Grace Ice & Water Shield roofing underlayment meets the following
standards:
Performance Properties
PROPERTYPROPERTY VALUEVALUE TEST METHODTEST METHOD
Color Gray-black
Thickness, membrane 40 mil (1.02 mm)
ASTM D3767
method A
Tensile strength,
membrane
250 psi (1720
kN/m )
ASTM D412 (Die C
modified)
Elongation, membrane 250%
ASTM D412 (Die C
modified)
Low temperature
flexibility
Unaffected @ -20°F
(-29°C)
ASTM D1970
Adhesion to plywood
3.0 lbs/in. width
(525 N/m)
ASTM D903
Permeance (max)
0.05 Perms (2.9
ng/m s Pa)
ASTM E96
Material weight
installed (max)
0.3 lb/ (1.3
kg/m )
ASTM D461
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We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration,
investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in
conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that
would infringe any patent, copyright, or other third party right.
Grace Ultra, Ice & Water Shield, Perm-a-Barrier, and Ripcord are trademarks, which may be registered in the United States and/or other countries, of GCP
Applied Technologies, Inc. COR-TEN® is a trademark registered in the United States and/or other countries, of United States Steel Corporation. DensGlass
Gold is a registered trademark of Georgia-Pacific Corporation. This trademark list has been compiled using available published information as of the
publication date and may not accurately reflect current trademark ownership or status.
© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.
GCP Applied Technologies, Inc., 62 Whittemore Avenue, Cambridge, MA 02140.
In Canada, GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6. Printed in U.S.A.
Printed materials intended for use in the United States only.
Slippery when wet or covered by frost.
Consistent with good roofing practice, always wear fall protection
when working on a roof deck.
Release liners are slippery. Remove from work area immediately aer
membrane application.
Do not leave permanently exposed to sunlight. Cover within 90 days.
Place metal drip edges or wood starter shingles over the membrane.
Do not fold over the roof edge unless the edge is protected by a drip
edge, gutter or other flashing material.
Do not install on the chamfered edges of wood plank.
Do not install directly on old roof coverings.
Certain product applications are prohibited in hot desert areas in the
southwestern United States. Contact your GCP Applied Technologies
sales representative for assistance choosing the best product for your
application.
Check with the manufacturer of the metal roofing system for any
special requirements when used under metal roofing.
Do not install under copper, Cor-Ten , or zinc metal roofing in high
altitudes. These roofs can reach extremely high temperatures due to
the low reflectivity, high absorption, and high conductivity of the
metals. Use Grace Ultra™ underlayment for these roof types. Contact
your GCP Applied Technologies sales representative for assistance
choosing the best product for your application.
®
Provide proper roof insulation and ventilation to help reduce ice dams
and to minimize condensation. Grace Ice & Water Shield membrane is
an air and vapor barrier.
®
Repair holes, fishmouths, tears, and damage to membrane with a
round patch of membrane extending past the damaged area 6 in.
(150 mm) in all directions. If fasteners are removed leaving holes in
the membrane, they must be patched. The membrane may not self-
seal open fastener penetrations.
Do not install fasteners through the membrane over unsupported
areas of the structural deck, such as over the joints between adjacent
structural panels.
Due to its slight asphaltic odor, do not apply where the membrane is
exposed to interior living space. Refer to product literature for more
complete information.
Not compatible with EPDM or TPO; use Grace Ultra™ underlayment
for tie-ins (refer to Technical Letter 5, Chemical Compatibility ).
Not compatible with polysulfides, flexible PVC, or high concentrations
of resin (pitch) found in some wood plank decks. For more information,
refer to Technical Letter 5.
®
ICC ESR-1677 approval according to AC-48 Acceptance Criteria for
Self-Adhered underlayments used as Ice Barriers
Miami-Dade County Product Control Approved. Report NOA 12-
1115.02
Florida State Approval Report No. FL289-R3
Underwriters Laboratories Inc. Classified Sheathing Material Fire
Resistance Classification with Roof Designs: P225, P227, P230, P237,
P259, P508, P510, P512, P514, P701, P711, P717, P722, P723,
P732, P734, P736, P742, P803, P814, P818, P824
Underwriters Laboratories Inc. Class A fire classification under fiber-
glass shingles and Class C under organic felt shingles (per ASTM
E108/UL 790)
CCMC Approval No. 13670-L
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Product Data Sheets