Pavers on Pedestal Supports Building Codes & Rules

Sub-sill

Waterstop Angle

≥ 2mm thick aluminium mill finished angle (or equivalent)

Waterstop Angle

NCC 2022 V1

Protect during construction (from physical damage)
Refer to Supplementary Installation diagrams – Waterstop angle critical dimensions (page 2)
Waterproofing Subcontractor must confirm Membrane compatibility with Waterstop Angle & all Substrates
For situations where the termination height of the membrane is less than the slab setdown, the waterstop angle can be installed (sequentially) after the membrane and windows. This includes designs with semi-flush windows and doors
Refer to the Waterstop angle placement (page 13) explanation in Supplementary information

≥ 2mm thick aluminium mill finished angle (or equivalent)

Finished Floor

Substrate

Fillet

Water Holding Surface

Waterstop Angle

Reveal

Chamfer or radius

Floor System

Fillet

Fall

AS 4654.2:2012, 2.8.3

Waterstop^{AS 4654.2:2012, 2.8.3}

Rebate, or
Waterstop angle

AS 4654.2:2012, 2.5.2

≥ 1:100^{AS 4654.2:2012, 2.5.2}

Turn & seal Waterstop Angle to prevent water ingress into cavity

Extent of Waterstop - Mirvac Requirement

The waterstop angle applies to the full extent of the balcony rebate under doors and fixed windows

Waterstop Angle - Mirvac Requirement

Horizontal leg must not clash with Sub-sill Anchors
Vertical leg must be sized to meet the project membrane vertical termination requirements

Membrane Height

Height sufficient to prevent wind-driven water entry^[1]

Membrane Height INTERPRETATION

NCC 2022 V1

NCC 2022 Vol 1, F1D5

AS 4654.2:2012, 2.8.1.1

AS 4654.2:2012, 2.8.3 (b)

The following Tools™ interpretation should be confirmed as DtS or Performance Solution

A roof, balcony, podium or similar horizontal surface part of a building must be provided with a waterproofing membrane to AS 4654.1 & 2^{NCC 2022 Vol 1, F1D5}
AS 4654.2-2012, 2.8.1.1 states Membrane height above finished surface is sufficient to prevent wind-driven water entering the building^{AS 4654.2:2012, 2.8.1.1}
Termination heights are given in the Standard as a guide only, so
The heights given are not mandatory
The "finished surface level" is implied as a solid non-draining surface
AS 4654.2-2012, 2.8.3 (b) states where the floor finishes do not allow an upturn, the membrane must terminate into the stormwater system, this is backed up by a Zero Threshold diagram^{AS 4654.2:2012, 2.8.3 (b)}
Pavers on pedestals are a similar solution
The free draining pavers are the grate
The membraned balcony with falls is the drain to stormwater
The membrane termination height is provided above the "water holding surface" which is also protected from wind driven rain by the pavers

Membrane Vertical Termination CERTIFICATION

NCC 2022 V1

Confirm with Waterproofing Consultant to confirm installation is considered DtS or Performance Solution
Mirvac's current position is considered DtS with Vertical Termination measured from Overflow Level
If horizontally discharged, taken vertically from the invert of the Overflow, or
If vertically discharged, taken vertically from the top of the Overflow

Membrane Height RULES

NCC 2022 V1

All Building Classes

NCC 2022 F1D5 [2019 Table F1.4]

May 2023

NCC 2022 Vol 1, F1D5

AS 4654.2:2012, 2.8.1.1

AS 4654.2:2012, A

A roof, balcony, podium or similar horizontal surface part of a building must be provided with a waterproofing membrane^{NCC 2022 Vol 1, F1D5}
To AS 4654.1 & AS 4654.2
Unless is a deck or perforated or directly above ground
Measured from top of surface finish to height of membrane^{AS 4654.2:2012, 2.8.1.1}
Height sufficient to prevent wind-driven water entry
Varies depending on wind class & level of protection
Termination heights to AS 4654.2 2012, Table A1 are minimum & informative only^{AS 4654.2:2012, A}
Must be specified based on individual project wind classification

AS 4654.2:2012, 2.8.1.1

Height sufficient to prevent wind-driven water entry^{AS 4654.2:2012, 2.8.1.1}