Core Cavity Weep

Core Cavity Weep™

Weeps for CMU Veneers

CCV 5020

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Core Cavity Weep
  • Core Cavity Weep
  • Core Cavity Weep
  • Core Cavity Weep
  • Core Cavity Weep

Core Cavity Weep Highlights

Core Cavity WeepTM is designed for use with CMU or Jumbo Brick used as a veneer.  It is superior to other weep hole or weep vent products because is creates multiple tunnels allowing water to exit the cavity by running on the top surface of the flashing.  It puts the weep holes at the lowest point of the wall, beneath the bed joint of mortar!


  • It forms the bottom side of the bed joint of mortar at the exterior and interior shell of a CMU or Jumbo Brick
  • It weeps both the core and cavity when CMU or Jumbo Brick is used as a veneer (cells must be a minimum of 3”)
  • It provides multiple weep holes frequently placed at the lowest point of the wall
  • It’s easy to install (12” wide – 25’ rolls)
  • Translucent in color to blend with mortar

Core Cavity Weep Installation


  • Core Cavity WeepTM should be positioned on flashings with material centered on wall.  Allow intermittent legs to extend into the wall cavity and to the exterior
  • Place bed joint of mortar on Core Cavity WeepTM and lay masonry units following normal installation procedures
  • Tool joints and lightly score legs at face of wall; crack off by pushing downward while mortar is still plastic
  • Finish tool joint and brush

Core Cavity Weep Ordering/Shipping

Contact MTI at 1-800-879-3348 for specific cost to your destination.

Core Cavity Weep Specifications

The 2.5" (64 mm) wide weep legs offset on each side of continuous belt, at 9.5" (241 mm) on center; continuous belt 2" (51 mm) wide; and total width 1'-0" (305 mm). 

Product CCV 5020
Roll Length (Feet) 25
Rolls per Box 8
Linear Feet per Box 200
Boxes per Pallet 16
Linear Feet per Pallet 3200
Pallet Size 48" x 40" x 64"