Sure Cavity

Sure Cavity™

Rainscreen Drainage Plane

SC5016, SC5032

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Sure Cavity
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Sure Cavity Highlights

Sure Cavity rainscreen drainage plane (drainage mat) works because it maintains a separation between the materials used for the veneer and the structural back-up wall.  Sure Cavity’s channels are better than fiber-based mesh because they enable moisture that enters the building envelope to travel quickly down and out the bottom of the wall.



  • Compartmentalized channels promote pressure equalization
  • High impact polystyrene ensures durability and prevents compression, waviness, and nail drive-through experienced with fiber-based mesh drainage mat products
  • Saves installation time (half the time of furring strips and backer board)
  • Provides LEED credit value with its 96% post-consumer recycled content.
  • The adhered fabric blocks mortar or stucco from filling the drainage channels and acts as a bug screen at the bottom

Sure Cavity Installation

  • Roll out Sure Cavity rainscreen drainage plane/drainage mat over the WRB on the backup wall with spunbond fabric facing the weather. Back wrap 4’’ fabric on bottom course to act as bug screen.
  • Temporarily attach Sure Cavity rainscreen drainage plane/drainage mat with hammer stapler on wood backup walls or dabs of adhesive on masonry. 
  • Roll out second and succeeding courses of Sure Cavity rainscreen drainage plane/drainage mat.  Overlap only the fabric.  Plastic butts directly to top of course beneath it.
  • Install veneer – attachment of veneer material will sandwich the Sure Cavity rainscreen drainage mat permanently in place in thin veneer applications.  (See installation animations below for your specific application.)

Sure Cavity Ordering/Shipping

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

Sure Cavity Specifications

SC5016 and SC5032 are 0.024" (0.6 mm) thick high impact polystyrene sheets. They are formed with corrugations and a spunbond polypropylene fabric on one side with a 4" (102 mm) skirt on one edge.

Product Number SC 5016 SC 5032
Square Feet per Roll 66 132
Roll Length (Feet) 50 50
Roll Width (Inches) 15.75 31.5
Channel Depth 3/16" / 5mm 3/16" / 5mm
Rolls per Box 4 N/A
Boxes per Pallet 16 N/A
Rolls per Pallet 64 32
Square Feet per Pallet 4224 4224
Pallet Size 50" x 50" x 88" 48" x 48" x 77"