With TAMKO Roofing Products
Why Use Underlayment?
Underlayment has been
utilized since the 1980’s
to help reduce sound,
imperfections, and threat
of damage to a roof.
greater resilience, and
generally increased life
of the roof.
underlayment for your
roof is not only
inexpensive, you can do
Get to Know your Underlayment
Failure to add
underlayment can cause
premature failure of the
Not all kinds of
underlayment are created
equal. Know how to best
install yours for the
consisting of asphalt
saturated organic felt, such
as TAMKO Number 15 or
Number 30 felt, should be
applied over the entire
deck before the installation
of Heritage shingles.
Beginning the Application
Apply the felt when the deck is dry.
On roof decks 4” per 1’ and
greater, apply the felt parallel to the
eaves lapping each course of the felt
over the lower course at least 2”.
Where ends join, lap the felt 4”.
If left exposed, the felt underlayment
may be adversely effected by moisture
Laying of the underlayment and the
shingle application must be done
Employing Moisture Guard
In areas where ice builds up along the eaves, or a
backup of water from frozen or clogged gutters is a
potential problem, TAMKO’s Moisture Guard Plus
Waterproofing Underlayment may be used.
Apply to Eaves, Rakes, Ridges, Valleys, around
Chimneys, Skylights, and/or Dormers to help prevent
The best way to ensure a succesful
installation of your underlayment is to
remain informed. Be sure to investigate
any questions you may have regarding
your TAMKO shingles. Lawsuit costs and
effort regarding unexpected damages can
be avoided if all instructions are properly
followed. For more information on ice and
water barriers, contact TAMKO’s technical