TAM‑SHIELD® SYNTHETIC UNDErLAYMENT
THESE LOCA
ADDITIONAL
APPLICATIONS
APPLICATION INSTrUCTIONS
THESE ARE THE APPLICATION INSTRUCTIONS FOR TAM‑SHIELD SYNTHETIC UNDERLAYMENT. TAMKO BUILDING
PRODUCTS, INC. SHALL NOT BE RESPONSIBLE FOR LEAKS OR OTHER ROOFING PROBLEMS RESULTING FROM
IMPROPER APPLICATION. FAILURE TO PROPERLY APPLY THIS PRODUCT ACCORDING TO THESE INSTRUCTIONS
COULD RESULT IN UNSAFE CONDITIONS AND COULD ADVERSLY AFFECT COVERAGE OF THE LIMITED WARRANTY.
SAFETY PRECAUTION
Personal fall protection devices, safety glasses and
hearing protection should always be used when applying
TAM-SHIELD SYNTHETIC UNDERLAYMENT. Moisture,
frost or debris may decrease the traction while walking on
TAM-SHIELD SYNTHETIC UNDERLAYMENT. PLEASE
EXERCISE CAUTION DURING INSTALLATION.
USES
TAM-SHIELD SYNTHETIC UNDERLAYMENT is intended
to perform the functions of an underlayment when installed
between the roof deck and the shingles or other final roof
covering. TAM-SHIELD SYNTHETIC UNDERLAYMENT will
not prevent wind driven rain from entering the building nor
should it be used as the primary roof covering. The final roof
covering must be installed before the structure is exposed to
adverse weather conditions, such as wind driven rain, high
wind, hail, ice storms, etc. Failure to apply TAM-SHIELD
SYNTHETIC UNDERLAYMENT properly and according to
TAMKO’s Application Instructions could adversely affect
coverage under the applicable Limited Warranty. TAM-SHIELD
SYNTHETIC UNDERLAYMENT is not adversely affected by
UV rays for up to 180 days.
SURFACE PREPARATION
Apply TAM-SHIELD SYNTHETIC UNDERLAYMENT when
the deck is dry. To begin, remove any dust, dirt, loose nails
or other protrusions from the deck of new roofs. Remove all
shingles, roofing felt, nails, or other existing roofing materials
and debris from the deck of existing roofs.
Before walking on the underlayment surface, the TAM-SHIELD
SYNTHETIC UNDERLAYMENT must be securely fastened to
the roof deck using corrosion-resistant nails or staples with 1
in. round plastic caps. Fall protection
devices should be utilized.
Moisture, frost or debris may
decrease the traction while walking
on TAM-SHIELD SYNTHETIC
UNDERLAYMENT.
FOR ROOF DECKS
Apply TAM-SHIELD SYNTHETIC
UNDERLAYMENT from low to high
in shingle fashion so that laps will
shed water. Overlap edge seams
3 in. as marked on the underlayment. End seams must be
overlapped 6 in. and staggered. The underlayment must be
laid out flat with printed side up without wrinkles and fastened
to a smooth dry surface. Care must be taken not to damage
the surface of the underlayment. DO NOT stretch during
installation.
For questions about TAM‑SHIELD SYNTHETIC UNDERLAYMENT or its application,
contact TAMKO’s Technical Services Department at 800‑641‑4691.
This product data sheet and application instructions were current at time of printing. To obtain a copy of the most current version
of this product data sheet and application instructions, visit us online at tamko.com or call us at 800-641-4691.
This product is covered by a 25-year limited warranty. For information regarding or a copy of TAMKO's limited warranty, contact
©2013 TAMKO Building Products, Inc. TAMKO is a registered trademark of TAMKO Building Products, Inc.
your local TAMKO representative, visit us online at tamko.com, or call us at 800-641-4691.
FASTENING
Do not use nails or staples without round plastic caps.
Fasteners must be long enough to penetrate at least
3/4 in. into the roof deck. Use only corrosion resistant nails
or staples with 1 in. round plastic caps. Fasteners must be
flush and at approximately a
90 degree angle to the roof
deck. Follow the nail pattern as
marked on the underlayment.
See illustration for details.
Fasteners on vertical and
horizontal laps must be spaced
FASTEN AT
TIONS
FOR ALL
APPLICATIONS
FASTEN AT
THESE
LOCATIONS
FOR HIGH-WIND
8 in. on center.
For High Wind Application requirements: Fasten the
underlayment at the additional nail locations that are marked
as dotted circles on the underlayment. Fasteners on vertical
and horizontal laps must be spaced 4 in. on center.
For Low Slope Application: On pitches 2 in. per foot to 4
in. per foot, cover the deck with two layers of TAM-SHIELD
SYNTHETIC UNDERLAYMENT. Begin by applying the
underlayment in a 24 in. wide strip along the eaves and
overhanging the drip edge by 1/4 to 3/4 in. Place a full 48
in. wide sheet over the 24 in. wide starter piece, completely
overlapping it. All succeeding courses will be positioned to
overlap the preceding course by 24 in. If winter temperatures
average 25°F or less, TAMKO’s Moisture Guard Plus®
self-adhering underlayment or any specialty eaves flashing
product should be installed from eaves and rakes to a point to
at least 24 in. inside the interior wall line of the building.
FOR VALLEYS AND RIDGES
Center TAM-SHIELD SYNTHETIC UNDERLAYMENT in the
valley or over the ridge, working from the center of the valley
or ridge outward in each direction. For valleys, apply the
underlayment starting at the lowest point and work upward.
Overlap all sheets in shingle fashion a minimum of 6 in.
PROVIDE VENTILATION WHEN USING
OVER THE ENTIRE ROOF DECK
When using TAM-SHIELD SYNTHETIC UNDERLAYMENT
over the entire roof deck the roof must include a system to
provide adequate ventilation for all space immediately below
the roof deck. Such ventilation system should be designed in
accordance with architectural design standards appropriate
to the size, nature, and location of the structure and must
include both ridge and soffit venting. For further information
on providing adequate ventilation, contact your architect,
building contractor, building materials supplier, or TAMKO.
It is the responsibility of the installer to ensure installation is
completed according to directions, and that all construction
by-laws and codes are met.
TAM‑SHIELD® SYNTHETIC
PRODUCT DATA
UNDErLAYMENT
IMPORTANT: This product features a skid resistant and tear resistant surface. This feature does not serve as
a substitute for following all proper fall protection procedures in accordance with OSHA regulatory requirements - including the use of personal fall protection devices when working on a roof. Applicator safety is of
utmost importance.
DESCRIPTION
TAM-SHIELD SYNTHETIC UNDERLAYMENT is a woven synthetic underlayment which
incorporates high strength, skid resistance and tear resistance with the increased coverage
and lightweight properties of synthetic underlayments.
USES
TAM-SHIELD SYNTHETIC UNDERLAYMENT is well-suited for use as an underlayment to
be applied over the deck prior to the installation of the final roof covering. It also provides
secondary protection for shedding water after installation of the roof system.
ADVANTAGES
• Light grey surface provides a cooler working surface than traditional felt
• Skid-resistant and tear resistant
• 5- or 10-square roll, lightweight, more coverage per roll than traditional felt underlayments.
• Lay lines and cap-nail locations printed on the underlayment for ease of install.
Also includes additional high wind cap nail locations.
• U.L. Prepared Roofing Accessory label
• 25-year Limited Warranty*
• Miami-Dade County Florida NOA 11-0520.04 Expiration Date: 10/04/2015
• ICC-ES ESR-3237
• Florida Building Code Approved FL14864
LIMITATIONS
• Membrane must not be applied to damp, frosty or contaminated surfaces.
• Membrane installation must be limited to use with roof coverings that do not involve hot
asphalt or coal-tar pitch.
PRODUCT DATA** 31001770 31001771
Roll Size
†
10 square 5 square
(1000 sq.ft.) (500 sq.ft.)
Roll Coverage
† †
937.50 sq.ft. 468.75 sq.ft.
(87.10 sq. m.) (43.55 sq. m.)
Roll Dimensions 48" x 250' 48" x 125'
Thickness 6 mil 6 mil
Rolls per 40" × 48" Pallet 30 48
**All values stated as nominal
† The coverage before overlaps as required by the instructions.
†† When applied according to instructions (excluding side lap).
TYPICAL PHYSICAL PROPERTIES
ProPerty test Method tyPical Value
Tear Resistance ASTM D 1970 126 lbf. MD
110 lbf. CD
Liquid Water Transmission ASTM D 4869 Pass
Tensile Strength AC 48 Section 4.1 78 lbf/in. MD
53 lbf/in. CD
Pliability AC 48 Section 4.3 Pass
*See Limited Warranty for details. For information regarding a copy of TAMKO's Limited Warranty,
contact your local TAMKO representative, visit us online at tamko.com, or call us at 800-641-4691.
tamko.com
Corporate 220 West 4th Street, Joplin, Missouri 64801 800-641-4691
Central District 220 West 4th Street, Joplin, Missouri 64801 800-641-4691
Northeast District 4500 Tamko Drive, Frederick, Maryland 21701 800-368-2055
Southeast District 2300 35th Street, Tuscaloosa, Alabama 35401 800-228-2656
Southwest District 7910 South Central Expressway, Dallas, Texas 75216 800-443-1834
Western District 5300 East 43rd Avenue, Denver, Colorado 80216 800-530-8868
JP68023 08/27/13
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