Installation Guide

Grace Construction Products
GRACE SELECT
™
Self-adhered roofing underlayment
Product Description
Grace Select
™
roong underlayment is composed of
two waterproong materials—a rubberized asphalt
adhesive, backed by a layer of high density cross lami-
nated polyethylene.
The product is 25 mils (0.64 mm) thick making it
lightweight and easy to handle and apply. The unique,
advanced rubberized asphalt formulation allows the
membrane to meet industry standards for fastener
sealability equivalent to products that are often signi-
cantly thicker and heavier.
The rubberized asphalt is backed by a paper release
liner that protects its adhesive quality. The release liner
is easily removed allowing the rubberized asphalt to be
bonded to the roof deck.
The membrane comes in a 195 ft
2
(18.1 m
2
) roll, and
measures 36 in. (914 mm) wide.
Features & Benets
Easy to handle and apply—The membrane is easy to
reposition, easy to install, bonds to the roof deck and
forms high quality laps.
Grace Ripcord
®
Split Release on Demand—The
Grace Ripcord
®
is a nylon string that is embedded
between the underlayment material and the release
liner. The Ripcord
®
feature gives the installer the option
of either splitting the release sheet for easy positioning
and installation, or removing the release sheet in one
piece.
Self sealing—The membrane meets key building code
standards for nail sealability of self-adhered roong
underlayments.
Lightweight—The 195 ft
2
roll weighs only a fraction
of what competitive materials weigh making transport
and handling easier.
Slip resistant surface—The slip resistant surface
maximizes traction for safety without compromising
the water integrity of the laps. The surface lm is resis-
tant to scufng and tracking oil in hot weather
Reroofable—Unlike some granular surfaced
membranes, Grace Select
™
membrane will not adhere
to the underside of the exposed roof covering making
reroong easier and less costly.
Grace expertise—Grace is the recognized leader in
self-adhered roong underlayments and is the manufac-
turer of Grace Ice & Water Shield
®
.
Guidelines for Use
Grace Select
™
membrane can be used as a sloped roof
underlayment to resist water penetration due to wind-
driven rain and ice dams. The membrane is designed to
meet code based minimum standards of performance in
severe climates.
Wind-Driven Rain
Sloped roofs protect structures by shedding rain water
but they are not waterproof. Storm-driven winds can
cause sloped roof coverings to lift. Rain can be easily
driven under the roof covering directly to the unpro-
tected deck where it causes leaks and damage to the
interior of the structure. Grace Select
™
membrane that
is applied beneath the sloped roof covering prevents