What are the Australian Standard requirements for waterproofing vertical termination details?
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. There must be at least a 75 mm overlap and the bottom of the flashing must be at least 10 mm from finished floor level.
2. Use a pressure seal and sealant (sheet membranes. There must be at least a 15 mm overlap and 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). There must be a 75 mm overlap and the bottom of the cavity flashing must be at least 10 mm from finished floor level.
In situations with a solid parapet wall, the membrane is required to be applied up, over and down the other side of the parapet wall with an additional capping over the top.
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