Steel Shingle Installation Guide
and 50-Year Limited Warranty
Page 1
• METALWORKS shingles are for application to roof decks with
slopes of at least 3 inches per foot and up to vertical application.
For slopes between 3 and 4 inches per foot, TW Metal & Tile
Underlayment or TW Underlayment must be used over entire
deck area for new roof construction. Refer to page 5 “UL Class A
Fire Rated Roof” for more information.
• Fasteners are to be 11 or 12 gauge galvanized steel with 3/8”
(1cm) heads. Stainless Steel nails and other stainless steel
fasteners should not
be used with this product. The minimum
length of fastener is 1 1/2” (3.8cm). Fasteners must
penetrate the deck by at least 1/2” (1.3cm). Check Local
Building Codes for maximum allowable roof layers.
• TAMKO recommends all field formed flashing be formed
from METALWORKS Trim Coil.
• Sealant shall be one part urethane contractor grade sealant.
THESE ARE THE MANUFACTURER’S APPLICATION
INSTRUCTIONS FOR THE ROOFING CONDITIONS
DESCRIBED. TAMKO BUILDING PRODUCTS, INC. ASSUMES
NO RESPONSIBILITY FOR LEAKS OR OTHER ROOFING
DEFECTS RESULTING FROM FAILURE TO FOLLOW THE
MANUFACTURER’S INSTRUCTIONS. THIS PRODUCT IS
COVERED BY A 50 YEAR LIMITED WARRANTY. TO OBTAIN
A COPY OF THE WARRANTY CALL 800-641-4691 OR VISIT
OUR WEBSITE AT metalworksroof.com or tamko.com. WE
RECOMMEND YOU CONSULT A PROFESSIONAL ROOFING
CONTRACTOR FOR INSTALLATION OF YOUR TAMKO
METALWORKS ROOF.
Ventilation (continued)
• Products which are acceptable for use as underlayment are:
TAMKO No. 30 Asphalt Saturated Organic Felt
A non-perforated asphalt saturated organic felt
which meets ASTM: D226, Type II, TAMKO
TW Metal & Tile Underlayment, TW Underlayment or
Tam-Shield
®
Synthetic Underlayment.
• The entire roof must be covered (prior to shingle application)
with underlayment (double layer at eaves and valleys). This
applies to new roof or re-roof applications.
• For roof slopes of 3 inches per foot to 4 inches per foot,
TAMKO’s self-adhering TW Metal and Tile Underlayment or
TW Underlayment must be applied over the entire deck for
new roof construction.
• Apply the underlayment parallel to the eaves, starting with the
lowest course, lapping each course 2” (5.1cm). Where ends
join, lap 4” (10.2cm).
• When covering hips and valleys, always overlap felt by
extending 24” beyond the center line of the hip or valley.
• Ice and Rain Protection: For new construction where
there is a possibility of ice forming along eaves or in valleys
causing a backup of water, TAMKO TW Metal and Tile
Underlayment or TW Underlayment should be used in lieu of
the bottom layer of underlayment. Extend from the eave’s
edge to a point at least 24” (61cm) beyond the exterior wall
line of the building and along the entire length of the valley,
19” (48cm) on each side of the centerline.
Underlayment and Ice/Rain Protection Underlayment
• Boxes should be kept in a dry place and under opaque tarps
while on the site.
• Use care when stacking boxes, For shingle boxes the
maximum stacking level is three high. Do not stack pallets
over two high.
• Boxes should be stacked on their sides. Do not lay boxes flat.
Boxes are marked with arrows indicating the proper stacking
direction.
• Avoid having loose materials on the roof.
Care for the Material
• Walk only on the top portion of the
shingles and avoid walking on the
locks/seams.
• Wear soft-soled shoes.
Traffic
Important
NEW ROOF DECK CONSTRUCTION: Roof deck must be
smooth, dry and free from warped surfaces.
REROOFING: Before reroofing it is recommended that old
metal drip edges be removed at eaves and rakes.
PLYWOOD: All plywood shall be exterior grade as defined by
the Engineered Wood Association. Plywood shall be a minimum
of 3/8” thickness and applied in accordance with the
recommendations of the Engineered Wood Association.
Sheathing
PREPARATION & BASIC REQUIREMENTS FOR THE
METAL SHINGLE ROOFING SYSTEM
Important: All detail work demands careful
consideration. It is important to consider water
flow and overlap materials in proper sequence!
APPROPRIATE FALL PROTECTION
METHODS SHOULD BE USED
WHENEVER WORKING ON ROOFS.
Use caution, product may be slippery.
Ventilation
VENTILATION: Inadequate ventilation of attic spaces can
cause accumulation of moisture in winter months and a build up
of heat in the summer. These conditions can lead to:
(i) Vapor Condensation
(ii) Deterioration of insulation, wood and other construction
materials
(iii) Mold and mildew
(iv) Ice damming on the roof
To help ensure adequate ventilation and circulation of air, place
louvers of sufficient size high in the gable ends and install an
adequate number of roof vents and soffit vents. FHA minimum
standards require one square foot of net free ventilation area
for each 150 square feet of attic floor area, or one square foot
per 300 square feet if a vapor barrier is installed on the warm
side of the ceiling or if at least one half of the ventilation is
provided near the ridge. If the ventilation openings are
screened, the total area should be doubled. For further
information on proper ventilation contact your architect, building
contractor, building materials supplier, or TAMKO’s Technical
Services Department.
PROPER VENTILATION IS ESSENTIAL
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