TAMKO TW-60 - Manual (Page 2)

Tamko ® Tw-60
Self-adhering Sheet waterproofing membrane
applicaTion inSTrucTionS
(CONTINUED)
PROTECTION COURSE fOR USE WITH TamkO TW-60 WaTERPROOfINg mEmbRaNE
Horizontal application Protection Course
For horizontal applications where membrane protection is required in TAMKO's application instructions, another manufacturer's protec-
tion course that is designed for horizontal installations may be used in conjunction with TAMKO's TW-60 waterproofing membrane,
provided the minimum requirements shown below are satisfied.
vertical application Protection Course
For vertical applications where membrane protection is required in TAMKO's application instructions, another manufacturer's protec-
tion course that is designed for vertical installations may be used in conjunction with TAMKO's TW-60 waterproofing membrane,
provided the minimum requirements shown below are satisfied.
Protection Course minimum Requirements
asphalt composition boards used as protection course shall comply with ASTM D6506 Standard Specification for Asphalt Based
Protection Board for Below-Grade Waterproofing.
Cellular polystyrene insulation used as protection course shall comply with ASTM C578 Specification for Rigid, Cellular Polystyrene
Insulation, Types IV, V, VI, VII, X, or XII.
Fan-folded extruded polystyrene insulation used as protection course shall have compressive strength exceeding 15 psi when tested
in accordance with ASTM D1621 Test Method for Compressive Properties of Rigid Cellular Plastics and maximum water absorption
of 0.4% when tested in accordance with ASTM C272 Test Method for Water Absorption of Core Materials for Structural Sandwich
Constructions.
Plastic drainage panels used as protection course shall have puncture strength exceeding 50 lbs when tested in accordance with ASTM
D4833 Test Method for Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products.
baCk fILL
Back fill must be clean fill with no rocks, pails or wood. After back fill is in place, it must be tamped with a tamper to compress the fill.
REPaIRINg mINOR DamagE TO THE TW-60 mEmbRaNE
Patch Repair:
Minor damaged areas of TAMKO TW-60 Membrane that are no larger than 4" by 4" in size (e.g. tears, holes, fishmouths, and delamina-
tions) can be repaired by installing a patch of TW-60 extending a minimum of 12" beyond the damaged area on all sides.
End Lap Repair:
Loose end laps no wider than 4" can be repaired by cutting and removing the loose material and applying a patch that extends 12"
beyond the area on all sides.
A patch Repair or an End Lap Repair must begin with removal of dust, dirt, and other materials that may interfere with adhesion from
the area receiving the patch. Remove or cut non-adhered, torn, or otherwise damaged membrane as necessary, creating a fully-adhered
surface to receive the patch. The underlying substrate must not be damaged while performing a Patch Repair or an End Lap Repair.
Install the TW -60, applying sufficient pressure by hand or with a roofing seam roller to promote adhesion to the underlying material.
Seal the edges of the patch by applying a 1/4" to 3/8" bead of TWM-1 mastic; smooth the bead with a trowel.
INSTaLLaTION Of TW-60 OvER PREvIOUSLY INSTaLLED LaYER Of TW-60
A second layer of TAMKO TW-60 Self-Adhering Sheet Waterproofing Membrane may be applied over an existing layer of TW-60
provided that appropriate surface preparation of the existing material is successfully accomplished.
As required for direct installation to a substrate, the surface of the existing layer must be free of dust, dirt and other materials or
conditions that could interfere with adhesion of the second layer. Irregularities in the installed TW-60 must be corrected prior to
installation of the second layer; this includes removing or cutting non-adhered, torn , or otherwise damaged membrane or surface film.
Take care to prevent damage to underlying substrates, such as insulated concrete forms, with these types of corrections. Side and end
laps of the second layer must not coincide with side and end laps of the first layer.
The decision for surface suitability of the first layer is subjective and rests with the applicator; TAMKO assumes no responsibility for
improper application (refer to TAMKO Waterproofing Limited Warranty) of the first or second layer, including improper application
due to poor adhesion from an improper surface.
Upon installation of the second layer of TW-60, the first layer of TW-60 is recognized as part of the assembly substrate and considered
"sold AS IS" and without warranty of any kind.
Failure to properly apply TAMKO TW-60 Self-Adhering Sheet Waterproofing Membrane according to the Application Instructions may
affect coverage under the applicable 5-year limited warranty.
PRODUCT DATA