Full Product Manual

39
Grace Construction Products
GRACE ICE & WATER SHIELD
®
HT
Self-adhered roong underlayment for
high temperature applications
Product Description
Grace Ice & Water Shield
®
HT high temperature self-adhered
roong underlayment is a premier membrane designed to deliver
premium in-place performance for high temperature applications.
It is composed of two waterproong materials—an innovative
and proprietary rubberized asphalt adhesive combined with a
high performance polymeric lm with UV barrier properties. The
rubberized asphalt surface is backed with a foldless release paper
that protects its adhesive quality. During application, the release
paper is easily removed, allowing the rubberized asphalt to bond
tightly to the roof deck. In addition, embedded in the membrane
is a split release on demand feature called Ripcord
®
.
Features & Benets
Today’s sloped roof designs utilize more insulation, incorporate
long-lasting roof coverings and tend to have lengthy construction
cycles. The many variables that contribute to roof top tempera-
tures; insulation, facing, pitch, color, etc., make it difcult to
predict what kind of heat prole the roof top will experience.
Choosing an underlayment that will perform under all of these
demanding conditions is essential to a successful roof design.
Grace Ice & Water Shield
®
HT underlayment was specically
designed to meet the challenge of these high-temperature applica-
tions. It is an environmentally conscious solution that provides
both condence and design exibility.
High temperature resistance—Rubberized asphalt will not ow,
even at temperatures as high as 260°F (127°C).
Extended exposure—Can be left exposed for up to 120 days.
Superior adhesion—The self-adhered membrane bonds rmly to
the roof deck without heat or special adhesives.
Ripcord is a unique, patented feature that makes Grace Ice &
Water Shield
®
HT underlayment easier to apply by giving the
applicator a split release on demand. Faster application of the
membrane in the straight-aways, as well as ease of membrane
positioning in detailed areas (valleys, around dormers, etc.), are
just some of the benets.
Foldless release paper—The foldless release paper provides
multiple performance enhancements: fewer edge catches, 180°
pull-back, ease of membrane cutting (single cuts) and membrane
positioning, quicker “one-man installs” resulting in an easier,
more productive release.
Seals around fasteners—The rubberized asphalt layer in Grace
Ice & Water Shield
®
HT membrane seals around roong nails and
other fasteners, resisting leakage caused by water back-up behind
ice dams or wind-driven rain.
Dual barrier protection—Rubberized asphalt is combined with
polymeric lm to form two waterproong barriers providing
maximum protection.
Membrane will not crack, dry out or rot—Grace Ice & Water
Shield
®
HT membrane resists attacks from fungus and bacteria;
maintains its integrity for long lasting protection.
Protects under all standard sloped roof
coverings—Grace Ice & Water Shield
®
HT underlayment
protects under slate, tile, cedar shakes, metal and conventional
asphalt shingles.
Slip resistant surface—Grace Ice & Water Shield
®
HT underlay-
ment has a slip resistant embossed surface to maximize traction
and improve safety.
Reroofable—Unlike some granular surfaced membranes, Grace
Ice & Water Shield
®
HT roong underlayment will
not adhere to the underside of the exposed roof covering. It can
be applied over the old Grace underlayment (except over Grace
Basik
®
, Grace Tri-Flex
®
and Grace SYN 15
™
) in retrot appli-
cations, making reroong easier, less costly, more durable and
environmentally friendly (as the
structural deck remains intact avoiding the need
to purchase additional wood decking).