Pavers on Pedestal Supports Building Codes & Rules

- Pavers on Pedestal Supports: Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.

External Waterproofing Overview

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}

Facade Building Interfaces

Façade Engineers to be engaged to review ALL building envelope interfaces

Facade Interface REQUIREMENTS

NCC 2022 V1

Façade Engineers are to be engaged to review ALL interfaces within a building envelope
Some interfaces within a residential façade (e.g. curtain wall/window wall/cladding) will be the ultimate responsibility of the sub contractor, but
the Façade engineer is still required to peer review the interface details within each system
Façade Engineer is to highlight unique interfaces of a building enclosure in their FP1.4 Report and either
regulate the design themselves (e.g. NSW D&BP approach), or
determine a pathway on who will document or certify the weatherproofing of the unique interface

Façade Engineers to be engaged to review ALL building envelope interfaces

Door or Window Sill

Fillet

Floor System

Pedestal

Support

Acoustic / Underlay

Fall

Angle

Membrane

Substrate

AS 4654.2:2012, 2.8.3

Waterstop^{AS 4654.2:2012, 2.8.3}

Rebate, or
Waterstop angle

Gasket to

protect

Membrane

Fillet

Internal Floor Level

Floor Finish

Pedestal

Support

Water Holding Surface

AS 4654.2:2012, 2.5.2

≥ 1:100^{AS 4654.2:2012, 2.5.2}

Sub-sill

Waterstop Angle