Specification

footing. Otherwise, use appropriate inside
corner detail where the wall and footing
meet. Seal all laps within 12" (300 mm) of all
corners with a troweling of mastic. Apply a
troweled bead of Bituthene Mastic or
Bituthene Liquid Membrane to all vertical and
horizontal terminations at the end of each
workday.
Protrusions and Penetrations
Apply membrane to within 1" (25 mm) of the
base of the protrusion. Apply Liquid Membrane
0.090" (2.3 mm) thick around the protrusion.
Extend
Bituthene Liquid Membrane over the
sheet membrane at least 3" (75 mm) and up
the protrusion to just below the finished height
of the wearing course (for horizontal applica-
tions) or for a minimum of 6" (150 mm) for ver-
tical applications.
FLOOD TESTING
Flood test all horizontal applications with a
minimum 2" (50 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 1 day after com-
pleting the application of Bituthene water-
proofing 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 REPAIR
Patch tears and inadequately lapped seams
with membrane. Slit fishmouths and repair with
a patch extending 6" (150 mm) in all directions
from the slit and seal edges of the patch with
Bituthene Mastic. Inspect the membrane thor-
oughly before covering and make any repairs.
PROTECTION
Protection of Membrane
Protect Bituthene membranes to avoid dam-
age from other trades’ construction materials
or backfill. Place protection immediately in tem-
peratures above 77 degrees F (25 degrees C) to
reduce potential for blistering.
On horizontal applications, use Hydroduct
660 Drainage Composite for protection.
Adhere as necessary to membrane with
Hydroduct Tape.
Alternate methods are to use 1/8" or 1/4"
(3 or 6 mm) asphaltic hardboard. When rein-
forced concrete slabs are placed over the
membrane, use Hydroduct 660 Drainage
Composite or 1/4" (6 mm) hardboard or 2 lay-
ers of 1/8" (3 mm) hardboard.
On vertical applications, use Hydroduct 220
Drainage Composite. Adhere Hydroduct 220 to
membrane with Hydroduct Tape. Alternative
protection methods are to use 1" (25 mm)
expanded polystyrene or 1/4" (6 mm)
extruded polystyrene that has a minimum
compressive strength of 10 lb/in
2
(69 kN/m
2
).
If 1/4" (6 mm) extruded polystyrene protec-
tion board is used, backfill should not contain
sharp rock or aggregate over 2" (50 mm) in
diameter. Adhere polystyrene protection
board with Hydroduct Tape or compatible
adhesive.
Cover any exposed Bituthene membrane
with weather resistant flashing such as cop-
per, aluminum or neoprene. Install Hydroduct
660 Drainage Composite or alternate protec-
tion the same day the membrane is applied
or immediately after a 24 hour flood test. No
waiting before backfill or application of wear-
ing course is necessary.
Placement of Backfill
Use care during backfill operation to avoid
damage to waterproofing and drainage sys-
tem. Follow generally accepted practice for
backfill and compaction. Backfill should be
added in 6" - 12" (150 - 300 mm) lifts. For
bermed areas that cannot be fully com-
pacted, a termination bar is recommended
across the top termination of the membrane.
In general, backfill or the final wearing
course should be placed as soon as possible
after installation of the membrane.
Placement of Reinforcing Steel
When placing reinforcing steel over properly
protected membrane, use concrete bar sup-
ports (dobies) or chairs with plastic tips or
rolled feet to prevent damage from sharp
edges. Use special care when using wire
mesh, especially if the mesh is curled.
6. Availability & Cost
AVAILABILITY
A network of distributors carries Bituthene water-
proofing systems and Hydroduct drainage com-
posite products for delivery to project sites.
COST
Bituthene waterproofing systems and
Hydroduct drainage composites are compet-
itively priced. For specific information, contact
a local distributor or a Grace Construction
Products representative.
7. Warranty
Five year material warranties covering
Bituthene and Hydroduct products are avail-
able upon request. Contact the manufactur-
er for further information.
8. Maintenance
None required, if installed in accordance with
manufacturer’s recommendations.
9. Technical Services
Support is provided by full-time, technically
trained Grace representatives and technical
service personnel, backed by a central
research and development staff.
10. Filing Systems
• Reed First Source
• Additional product information is available
from the manufacturer.
SHEET WATERPROOFING 07 13 00
Grace Construction Products
®
SPEC-DATA
ª
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are registered trademarks of Reed Elsevier Inc. The ten part SPEC-DATA format conforms to the editorial style
of The Construction Specifications Institute and is used with their permission. The manufacturer is responsible for technical accuracy. ©2007 Reed Construction Data. All Rights Reserved.