What vertical termination detail for a waterproofing membrane is required by Australian Standards?

AS 4654.2 provides 3 options for vertical termination of a membrane:

  1. Chase a 15 mm deep reglet into the wall and turn the membrane inside. Insert an ‘over-flashing’ embedded in silicone to cover the top of the membrane (liquid and fully bonded sheet membranes. The bottom of the flashing must be at least 10 mm from finished floor level.
  2. Use a pressure seal and sealant (sheet membranes. The bottom of the pressure seal must be at least 10 mm from finished floor level.
  3. Terminate under overhang of cavity flashing (any membrane). The bottom of the cavity flashing must be at least 10 mm from finished floor level.

In situations with a parapet wall, the membrane is required to be applied up, over and down the other side of the parapet wall. See also, What is the Australian Standard requirement for vertical termination height of external waterproofing?

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