PreTak

PreTak

PreTak is a pre-applied HDPE sheet waterproofing membrane combined with a pressure sensitive adhesive backing that mechanically bonds to cast in place concrete and shotcrete. Applied in both blindside shoring and underslab applications, PreTak’s highly durable, fully adhered membrane is ideal for applications requiring superior protection from both water intrusion, chemical ground contaminants and methane gas.

PreTak can be applied directly to a wide variety of substrates and utilizes a high-density polyethylene (HDPE) sheet that, once installed, provides a tough and durable waterproofing membrane. Combined with a Pressure Sensitive Adhesive (PSA), PreTak becomes fully adhered when freshly placed concrete or shotcrete is applied directly to it, eliminating the potential for lateral water migration.

PreTak (46 mil/1.2mm) is a fully adhered waterproofing sheet membrane consisting of a long fiber HDPE film coated with a PSA gel and protected by a plastic release liner. The edges of PreTak are treated with a 3-inch (70mm) wide pre-adhered seam (selvedge).

Installation is efficient and reliable with a manufacturer-marked adhesive selvedge allowing for a watertight bond at seam overlaps. PreTak delivers superior performance in harsh conditions without the need for specialized equipment, heat or power.

PreTak is City of Los Angeles approved as a gas and methane barrier (LARR #26164) and for shotcrete. 

PreTak has several benefits:

  • Surpasses other fully adhered HDPE membrane systems by achieving the ideal blend between value and performance.
  • More than 25 years of a successful track record of performance on projects around the world.
  • Suitable for a variety of critical building envelope applications, challenging site conditions and contaminated soils.
  • Not affected by rain or ponding water.
  • Prevents lateral water migration by forming a continuous adhesive bond to poured-in-place concrete and shotcrete.
  • Versatile seam options for hydrostatic, non-hydrostatic, durable HDPE withstands puncture and tearing.
  • Double width rolls reduce seams and labor.
  • Can be applied to blindside/permanent formwork, which allows maximum use of confined and zero-lot-line sites.
  • Self-protecting so it can be trafficked immediately after application for follow-on trade work.
  • Heat weld capable for unsurpassed watertight seam performance and ground contaminant site protection.
Thickness: 46 mil.
City of Los Angeles Methane Approval
SPECIFICATION 2020 PreTak Guide Specification
E.Series
PDS e.drain 6000
PDS PreTak
PDS PreTape
PDS PreTape D
SDS PreTak
SDS PreTak HW
SDS PreTape & PreTape D
System Information Sheet PreTak
System Overview PreTak
51.100.1 UNDERSLAB ASSEMBLY
51.100.2 UNDERSLAB ASSEMBLY - WITH PROTECTION SLAB
51.100.3 UNDERSLAB ASSEMBLY - WITH BASE AND PROTECTION SLAB
51.100.4 UNDERSLAB ASSEMBLY - WITH BASE SLAB
51.100.6 UNDERSLAB ASSEMBLY - WITH INSULATION
51.110.7.1 SEAM OPTIONS - FACTORY PRE-APPLIED ADHESIVE
51.110.7.2 SEAM OPTIONS - TAPED
51.120.1 UNDERSLAB PENETRATION - PIPE
51.122.3 UNDERSLAB PENETRATION - AUGER CAST PILE WITH BASE & PROTECTION SLAB
51.128.2 Underslab Penetration - Multi-Conduit/Pipe Bundle With Limited Annular Space (Option 1)
51.133.1.1 Underslab Assembly - Pile Cap (Non-Hydrostatic)
51.133.1.2 Underslab Assembly - Pile Cap (Hydrostatic)
51.140.1 UNDERSLAB ASSEMBLY - VERTICAL TRANSITION - WOOD LAGGING
51.140.2 Underslab Assembly - Vertical Transition - Shotcrete Shoring
51.142.1 Underslab Assembly - Grade Beam
51.144.1.55 UNDERSLAB ASSEMBLY - OFFSET SLAB TRANSITION - PRIMETAK POST-APPLIED SYSTEM
51.170.1 Underslab Assembly - Repair - Puncture & Tears Under 1"
51.170.2.1 Underslab Assembly - Repair - Punctures & Tears 1" Or Greater (Positive Lap Seam)
51.170.2.2 Underslab Assembly - Repair - Punctures & Tears 1" Or Greater (Sandwich Seam)
51.170.2.3 Underslab Assembly - Repair - Punctures & Tears 1" Or Greater (Reinforced Seam)
51.300.1 BLINDSIDE VERTICAL ASSEMBLY - WOOD LAGGING
51.300.1.1 Blindside Vertical Assembly - Wood Lagging with Insulation
51.300.1.2 Blindside Vertical Assembly - Wood Lagging with Asphalt Board
51.300.2 Blindside Vertical Assembly - Shotcrete Shoring
51.300.3 Blindside Vertical Assembly - Soil Mix Shoring
51.302.1 Blindside Vertical Assembly - Back Lagging At Soldier Pile
51.302.3 Blindside Vertical Assembly - Back Lagging At Soldier Pile - Canted Flange Fill
51.302.4 Blindside Vertical Assembly - Back Lagging At Soldier Pile - Square Flange Fill
51.303.1 Blindside Vertical Assembly - Sheet Pile - With Drainage Course
51.303.2 Blindside Vertical Assembly - Sheet Pile - Backfilled With Plywood - With Drainage Course
51.303.3 Blindside Vertical Assembly - Sheet Pile - Backfilled With Plywood - No Drainage Course
51.303.4 Blindside Vertical Assembly - Sheet Pile - No Drainage Course
51.313.1 Blindside Vertical Assembly - Repair - Fasteners (Hydrostatic & Non-Hydrostatic)
51.314.1 Blindside Vertical Assembly - No Puncture HDPE Fixing Disc Fasteners
51.320.1 BLINDSIDE VERTICAL PENETRATION - SOE WOOD LAGGING
51.320.2 Blindside Vertical Penetration - SOE Shotcrete
51.321.3 Blindside Vertical Penetration - Wood Lagging - Dowel & Rebar (Non-Hydrostatic)
51.321.3.1 Blindside Vertical Penetration - Shotcrete Shoring - Dowel & Rebar (Non-Hydrostatic)
51.321.5.1 Blindside Vertical Penetration - Eye Lag Screw (Non-Hydrostatic)
51.321.5.2 Blindside Vertical Penetration - Eye Lag Screw (Hydrostatic)
51.323.2 Blindside Vertical Tieback - Detensioned - 24" Sonotube Or Framed Blockout (Min. 18")
51.323.3 Blindside Vertical Tieback - Detensioned - 24" Sonotube Or Framed Blockout (Min. 18") With Cut-Off Head (Option 1)
51.323.4 Blindside Vertical Tieback - Detensioned - 24" Sonotube Or Framed Blockout (Min. 18") With Cut-Off Head (Option 2)
51.324.1 Blindside Vertical Tieback - Non-Detensioned - No Blockout
51.324.1 NON-DETENTIONED TIEBACK WITH NO BLOCKOUT
51.325.1 Blindside Vertical Penetration - Raker & Waler
51.326.3 Blindside Vertical Penetration - Nelson Stud
51.328.3 Blindside Vertical Penetration - Multi-Conduit/Pipe Bundle With Limited Annular Space - SOE/Wood Lagging
51.328.4 Blindside Vertical Penetration - Multi-Conduit/Pipe Bundle With Limited Annular Space - Shotcrete
51.330.1 Underslab Assembly- Vertical Transition - Footing Discharge Pipe With Base Slab
51.330.2 Underslab Assembly- Vertical Transition - Footing Discharge Pipe
51.331.1 Blindside Vertical Assembly - Grade Termination - Reinforcement Flashing With E.Roll
51.331.1.1 Blindside Vertical Assembly - Grade Termination - Reinforcement Flashing With Primetak
51.331.2 Blindside Vertical Assembly - Grade Termination - Reinforcement Flashing With E.Roll With Cement Board
51.331.2.1 Blindside Vertical Assembly - Grade Termination - Reinforcement Flashing With PrimeTak With Cement Board
51.331.3 Blindside Vertical Assembly - Grade Termination - Limited Access
51.370.3 Blindside Vertical Assembly - Plan View - Expansion Joint
51.381.2 OUTSIDE CORNER
51.381.3 CORNER - INSIDE - FIELD FORMED
51.381.4 Corner - Topside - Inside - Field Formed
51.381.5 Corner - Topside - Outside - Field Formed
51.390.1 Pretak Assembly - Isometric - Underslab To Blindside Wall
52.100.1 UNDERSLAB ASSEMBLY
52.110.7.3 PRETAK HW HEAT WELDED SEAMS
52.110.7.4 PRETAK-HW HEAT WELDED SEAMS - EXTRUDED WELDS
52.120.1 UNDERSLAB PIPE PENETRATION
52.122.1 UNDERSLAB AUGER CAST PILE PENETRATION
52.127.1 THRU-FLOOR DEWATERING PIPE CAPPED PENETRATION FIELD MANUFACTURED PIPE COLLAR
52.140.1 UNDERSLAB ASSEMBLY TRANSITION TO SHORING ASSEMBLY
52.140.2 UNDERSLAB ASSEMBLY TRANSITION TO SHOTCRETE SHORING ASSEMBLY
52.300.1 SHORING ASSEMBLY
52.320.1 VERTICAL PIPE PENETRATION - FIELD MANUFACTURED PIPE COLLAR
52.323.4 DETENSIONED TIEBACK CUT-OFF HEAD BLOCKOUT METHOD USING 24 SONOTUBE
52.324.1 NON-DETENTIONED TIEBACK WITH NO BLOCKOUT
52.380.1 INSTALLATION OVER WOOD LAGGING AND STEEL PILES
52.381.2 OUTSIDE CORNER
52.381.3 INSIDE CORNER