TAMKO TW-60 - Manual

Tamko ® Tw-60
Self-adhering Sheet waterproofing membrane
applicaTion inSTrucTionS
SURfaCE PREPaRaTION
Concrete-
The surface must be dry and have a smooth (not broomed) finish and be free of form release agents, voids and sharp protrusions. Forms should
be removed as quickly as possible. On a horizontal deck do not apply membrane when forms are in place, unless the forms are vented. Concrete
should be allowed to cure for a minimum of 7 days. Curing agents containing wax, oil, or pigment should not be used. Any holes or voids must
be repaired with non-shrink grout. Cracks greater than 1/16" in width shall be cut out to a minimum of 1/4" with a minimum depth of 1/4" and
sealed using a sealant suitable for use with rubberized asphalt per sealant manufacturer, prior to the installation of the sheet membrane. Note:
On masonry surfaces mortar joints must be flush to the face of the concrete block or brick and have a thorough parge coat.
Expanded / Extruded Polystyrene (EXP/XPS) or Insulated Concrete forms (ICf)-
Ultraviolet radiation in sunlight causes a rapid deterioration of the EPS surface which can create a chalky or dusty layer which could interfere
with the membrane adhesion. If this occurs, or if the surface of the EPS is dirty, brush off the excess dirt and dust to provide a clean dry surface
for the application of the membrane. Joints and voids in the surface over 1/4" should be filled with non-shrink grout, expandable foam or
compatible crack filler.
Priming-
Priming is required on concrete and masonry surfaces, but may not be necessary on EPS/XPS and ICF surfaces that are clean and
dry and have not developed a dusty layer due to sun exposure. Select either TWP-1*** Primer or TWP-2 Water-Based Primer, as
appropriate, for the surface to be primed. DO NOT USE products containing solvents on EPS/XPS or ICF surfaces. Thoroughly mix the
primer. Apply at recommended coverage rates with a sprayer or long nap roller and allow to dry as specified in the primer's application
instructions. Drying times may vary according to weather conditions.
flashing-
All penetrations and drains must be flashed with TW-60 membrane, extending the membrane a minimum of 6" on all sides. All cracks and
joints must be sealed with a sealant suitable for use with rubberized asphalt per sealant manufacturer, and flashed with a 12" wide strip of TW-
60 membrane centered on the axis of the corners.
HORIzONTaL aPPLICaTION
Starting at the low point of the surface and working to the high point, install TW-60 membrane by simultaneously rolling the sheet
into place while removing the release film. Side laps should be 2 1/2", and end laps should be 5". Stagger all end laps. All terminating
edges should be sealed with TWM-1 Mastic. Roll the entire membrane as soon as possible with a minimum 75 lb. garden roller
wrapped with indoor/outdoor carpet.
If a flood test is required by the design professional, it should be conducted before the application of a protection layer. Check for leaks
and make repairs immediately. Before flood testing be sure the structure is capable of withstanding the dead load of the water. Re-test
after repairs have been made.
When TAMKO TW-60 is utilized as a waterproofing membrane in accordance with TAMKO Waterproofing Construction Detail TW-10
"Typical Balcony / Entry / Breezeway Outside Edge Detail" flood testing of the installation is considered good practice. The decision
regarding necessity of a flood test is the responsibility of a design professional. When utilizing TW-60 as a waterproofing membrane on
horizontal applications for balconies - the balcony must have a built-in positive slope away from the wall.
vERTICaL aPPLICaTION
Install TW-60 Sheet Membrane in lengths of 8' or less. Overlap edge seams 2 1/2". On walls above 8', apply in 8' sections, starting
at the lowest point with the higher section overlapping the lower section 5". Use heavy hand pressure or a suitable roller to press
membrane firmly against wall.
Terminations when applying to a concrete surface:
TW-60 sheet should be installed over the top of a wall or over the edge of a slab. If the membrane must terminate on a vertical surface,
use a reglet or counter flashing. Press terminating edge firmly with a hammer handle or similar tool. Apply TWM-1 Mastic to all
terminating edges.
TW-60 Sheet Membrane shall be installed on the base of the foundation wall, over the edge of the footing and the terminating edge
pressed firmly against the vertical surface of the footing. Apply TWM-1 Mastic to all terminating edges including both vertical and
horizontal.
Note: Failure to use adequate pressure at terminating edges will result in poor seal, potential leak and may affect coverage under the
limited warranty. The use of mastic is not a substitute for a good seal.
Terminations when applying to EPS / XPS and ICf:
Apply a thick (min 3/8") bead of sealant suitable for use with rubberized asphalt and EPS / XPS and/or ICF per sealant manufacturer, at
the termination of the waterproofing membrane and smooth with a putty knife to seal the termination. A non-deteriorating termination
bar is required at the head of the waterproofing membrane.
mEmbRaNE PROTECTION
Vertical surfaces must be protected immediately following installation of the membrane. Horizontal surfaces should be protected immediately.
If a flood test is required the horizontal surface shall be protected immediately following the flood test. If the flood test is delayed, a temporary
protection layer must be installed to protect the membrane from future operations and other trades. When TW-60 is utilized as a waterproofing
membrane in accordance with TAMKO Waterproofing Construction Detail TW-10 "Typical Balcony / Entry / Breezeway Outside Edge Detail"
flood testing of the installation is considered good practice. The decision regarding necessity of a flood test is the responsibility of a design
professional.
***
WarNiNgs aNd Hazards
TWP-1 contains combustible solvents. Avoid exposure to sparks, open flame, heat, and other forms of ignition. Use in well-
ventilated areas. Avoid breathing vapors. Refer to MSDS for detailed product information and warnings.