Instructions / Assembly

carpet to allow the membrane to fully contact
t
he primed substrate. Seal all T-joints and
membrane terminations with Bituthene
L
iquid Membrane at the end of the day.
Protrusions and Drains
Apply membrane to within 1 in. (25 mm) of
the base of the protrusion. Apply Bituthene
Liquid Membrane 0.1 in. (2.5 mm) thick
around protrusion. Bituthene Liquid
Membrane should extend over the membrane
a minimum of 2
1
⁄2 in. (65 mm) and up the
penetration to just below the finished height
of the wearing course.
Flood Testing
Flood test all horizontal applications with a
minimum 2 in. (51 mm) head of water for
24 hours. Mark any leaks and repair when the
membrane is dry. Before flood testing, be sure
the structure will withstand the dead load of
the water. For well-sloped decks, segment the
flood test to avoid deep water near drains.
Conduct the flood test 24 hours after complet-
ing the application of Bituthene waterproofing
system. Immediately after flood test is
completed, and all necessary repairs made,
install Hydroduct
®
660 Drainage Composite
to protect the Bituthene membrane from
traffic and other trades.
Membrane Repairs
Patch tears and inadequately lapped seams
with membrane. Clean membrane with a
damp cloth and dry. Slit fishmouths and repair
with a patch extending 6 in. (150 mm) in all
directions from the slit and seal edges of the
patch with Bituthene Liquid Membrane.
Inspect the membrane thoroughly before
covering and make any repairs.
Drainage
Hydroduct drainage composites are recom-
mended for both active drainage and
protection of the membrane. See Hydroduct
product information sheets.
Protection of Membrane
Protect Bituthene membranes to avoid
damage from other trades, construction mate-
rials or finishes. Place protection immediately
in temperatures above 77°F (25°C) to avoid
potential for blisters.
• On horizontal applications, exposed to
construction traffic, use Hydroduct 660
Drainage Composite. Adhere as necessary
to membrane with Hydroduct Tape. Alter-
nate methods of protection are to use
1
⁄8 in.
(3 mm) or
1
⁄4 in. (6 mm) asphalt hardboard.
In mud slab waterproofing, or other appli-
cations where positive drainage is not
desired, and where reinforced concrete
s
labs are placed over the membrane, the use
of
1
⁄4 in. (6 mm) hardboard or 2 layers of
1
⁄8 i
n. (3 mm) hardboard is recommended.
• Cover any exposed Bituthene membranes
with weather resistant flashing such as
copper, aluminum or neoprene. Install
protection the same day the membrane is
applied or immediately after 24 hour flood
testing. No waiting before backfill or appli-
cation of wearing course is necessary.
Insulation
Always apply Bituthene membrane directly to
primed or conditioned structural substrates.
Insulation, if used, must be applied over the
membrane. Do not apply Bituthene membranes
over lightweight insulating concrete.
Approvals
• City of Los Angeles Research Report
RR 24386
• U.S. Department of Housing and Urban
Development (HUD) HUD Materials
Release 628E
• Bituthene System 4000 Membrane carries
an Underwriters’ Laboratory Class A Fire
Rating (Building Materials Directory, File
#R7910) when used in either of the follow-
ing constructions:
—Limited to noncombustible decks at
inclines not exceeding
1
⁄4 in. (6 mm) to
the horizontal 1 ft (0.3 m). One layer of
Bituthene waterproofing membrane,
followed by one layer of
1
⁄8 in. (3 mm)
protection board, encased in 2 in. (50 mm)
minimum concrete monolithic pour.
—Limited to noncombustible decks at
inclines not exceeding
1
⁄4 in. (6 mm) to
the horizontal 1 ft (0.3 m). One layer of
Bituthene waterproofing membrane,
followed by one layer of DOW Styro-
foam PD Insulation Board [2 in. (50 mm)
thick]. This is covered with one layer of
2 ft x 2 ft x 2 in. (0.6 m x 0.6 m x 50 mm)
concrete paver topping.
Warranty
Five year material warranties covering
Bituthene and Hydroduct products are avail-
able upon request. Contact your Grace sales
representative for details.
Technical Services
Support is provided by full time, technically
trained Grace representatives and technical
service personnel, backed by a central
research and development staff.