Specification

FUL
LY-
ADHERED
UND
E
R
L
AY
M
EN
T
Features & Benefits
E
asy to handle and apply—The self-adhesive
membrane bonds firmly to the substrate without heat
or special adhesives. Water cannot seep under the
membrane. Watertight seams are easily formed.
Ripcord is a unique, patented feature that makes Grace
Roof Detail Membrane easy to apply by giving the
applicator a split release on demand. The split release
makes positioning in detail areas easy by minimizing
the amount of adhesive exposed during installation.
Both the 9 in. and 18 in. rolls contain Ripcords placed
at the center and near the edges to simplify application
of the membrane at angled transitions, allowing the
applicator to select the amount of adhesive to be
exposed during installation.
Seals around nails—The rubberized asphalt layer in
Grace Roof Detail Membrane seals around roofing
nails, resisting leakage caused by water back-up
behind ice dams, or from wind-driven rain.
Membrane will not crack, dry out or rot—Grace Roof
Detail Membrane resists attacks from fungus and bacteria;
maintains its integrity for long lasting protection.
Protects under all standard sloped roof coverings—
Grace Roof Detail Membrane protects under slate, tile,
cedar shakes or metal, as well as under conventional
asphalt shingles.
Slip resistant surface—Grace Roof Detail Membrane
has a slip resistant embossed surface to maximize trac-
tion and safety for applicators.
Proven track record—Grace Roof Detail Membrane
is based on Grace Ice & Water Shield, the name brand
in roofing underlayments with over 30 years of
protecting roofs from ice dams and wind-driven rain.
Reroofable—Unlike some granular-surfaced
membranes, Grace Roof Detail Membrane will not
adhere to the underside of the exposed roof covering.
Grace Roof Detail Membrane can be applied over the
old Grace underlayment (except over Grace Basik
®
) in
retrofit applications, making reroofing easier, less
costly—since there is no need for removing the exist-
ing underlayment—more durable and environmentally
friendly—as the substrate remains intact, avoiding the
need to purchase additional wood substrate.
Inhibits corrosion—Grace Roof Detail Membrane
isolates metal roof components from new corrosive
wood preservatives.
Grace technical support—Grace Roof Detail Membrane
is backed by a team of technical support personnel that
help ensure every application goes smoothly.
Guidelines for Use
R
oof Details—Grace Roof Detail Membrane is used
as a flashing to provide resistance against water infil-
tration at trouble-prone roof detail areas such as
valleys, drip edges, rake edges, chimneys, ridges,
skylights, dormer walls and roof-to-wall transitions.
Local building codes should be consulted for specific
requirements.
Installation Procedure
Surface Preparation
Install Grace Roof Detail Membrane directly on a
clean, dry, continuous structural substrate. Some suit-
able substrates are plywood, wood composition, metal,
concrete or gypsum sheathing. For all other substrates,
contact your Grace representative. Remove dust, dirt,
loose nails and old roofing materials. Protrusions from
the substrate area must be removed. Substrates shall
have no damaged or unsupported areas, or voids.
Repair substrate before installing the membrane.
Priming
Prime concrete, masonry, DensGlass Gold
®
and Dens-
Deck
®
surfaces with Perm-A-Barrier
®
WB Primer.
Prime wood composition and gypsum sheathing with
Perm-A-Barrier WB Primer if adhesion is found to be
marginal (refer to Technical Letter 12, Use on
Oriented Strand Board (OSB) Roof Sheathing). Apply
Perm-A-Barrier WB Primer at a rate of 250–350 ft
2
/gal
(6–8 m
2
/L). Priming is not required for other suitable
surfaces provided that they are clean and dry.
■ Grace Roof Detail Membrane
Use Grace Roof Detail Membrane on all
critical areas