Preparing a Defense
For new construction where
there is a possibility of ice
forming along the eaves or in
the valleys, TAMKO TW Metal
and Tile Underlayment should
be used as the first layer of
It should extend from the
eave’s edge to a point at least
twenty-four inches beyond
the exterior wall line of the
building, and along the entire
length of the valley nineteen
inches on each side of the
Applying the Underlayment
To help assure protection from the elements,
the entire roof must be covered prior to shingle
TAMKO number thirty asphalt saturated
organic felt is the recommended underlayment
for this process.
This applies to new roof or reroof applications.
New Roof Construction
However, for new
with slopes of three
inches per foot to
four inches per
foot, TAMKO Self-
adhering TW Metal
be applied over the
Applying the Felt
Apply the felt parallel to the eaves starting with
the lowest course, lapping each course two
Where the ends join, lap four inches.
When covering hips and valleys, always
overlap felt by extending twenty-four inches
beyond the center line of the hip or valley.
For Further Information…
For roof application requiring an underrider’s
laboratory’s class A system, refer to the
Metalworks installation guide or contact
TAMKO’s technical services department.
Using these simple guidelines, your project
can be completed with minimal effrot. With
TAMKO, roofing complains such as complexity
and confusion can become a thing of the past.