External Waterproofing (Benchmark) Building Codes & Rules

- External Waterproofing Benchmark: Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.

Fall

Sealant Joint

Fall

Waterproofing materials to AS 4654.1

AS 4654.2:2012, 2.5.2

≥ 1 : 100^{AS 4654.2:2012, 2.5.2}

AS 4654.2:2012, 2.5.2

≥ 1 : 100^{AS 4654.2:2012, 2.5.2}

AS 4654.2:2012, 2.5.2

≥ 1 : 100^{AS 4654.2:2012, 2.5.2}

AS 4654.2:2012, 2.5.2

≥ 1 : 100^{AS 4654.2:2012, 2.5.2}

Film Thickness Test

Threshold

Post Support

Screed

Floor Finish

≥ 1 : 100 Fall to drainage^[1]
≥ P3 or R10 Slip Rating^[2]
≤ 4.5m CTS Movement Joints^[3]

Slip RATING

NCC 2022 V2

All Building Classes

NCC 2022 D1P2

May 2023

Surface FINISHES

NCC 2022 V3

All Building Classes

NCC 2022 F2D2, S26C3, HP10.2.11 to 13 [2019 F1.7]

May 2023

AS 4654.2:2012, 2.15.2

NCC 2022 Vol 1, F2D2

Building elements in Wet Areas to be Waterproof or Water Resistant to the NCC^{AS 4654.2:2012, 2.15.2}
Overlaying system not to harm & be suitable with the membrane
Membrane bonded to topping or bedding^{AS 4654.2:2012, 2.15.2}
≥ 10mm movement joint width at ≤ 4.5m CTS
Structural topping^{NCC 2022 Vol 1, F2D2}
≥ 50mm thick with light mesh reinforcement
Install double slip sheet on top of membrane
Align movement joints in finishes over all building construction, control or movement joints

AS 4654.2:2012, 2.15.2

AS 4654.2:2012, 2.5.2

HB 198:2014, 5.1

≥ 1 : 100 Fall to drainage^{AS 4654.2:2012, 2.15.2}
≥ P3 or R10 Slip Rating^{AS 4654.2:2012, 2.5.2}
≤ 4.5m CTS Movement Joints^{HB 198:2014, 5.1}

Movement Joint

Flashing

Overflow

End Cap

Fully seal to sub-sill
≥ 6mm gap to reveal with backing rod & sealant

End Cap WATERPROOFING

NCC 2022 V1

null

Fully seal to sub-sill
≥ 6mm gap to reveal with backing rod & sealant

Planter Box

Site Tools

Parapet

Floor Waste

Fillets

40 x 40mm^[1] Sheet Membrane
15 x 15mm^[2] Liquid Membrane

Fillet RULES

NCC 2022 V3

All Building Classes

NCC 2022 F2D2, S26C6, & 10.2.6 [2019 F1.7, 3.8.1.3]

May 2023

AS 4654.2:2012, 2.7

Building elements in Wet Areas to be Waterproof or Water-resistant to NCC Specification 26, Part 10.2 & AS 4654.2
Membrane transitions from horizontal to vertical, or vertical to vertical planes, require the implementation of a Fillet, Cove, or Bond Breaker^{AS 4654.2:2012, 2.7}
40x40mm Fillet or cove for Sheet Membrane
15x15mm Fillet or Bond Breaker for Liquid Membrane

Membrane RULES

NCC 2022 V3

All Building Classes

NCC 2022 F2D2, S26C3, HP10.2.6 [2019 Table F1.7, 3.8.1.3]

May 2023

AS 4654.2:2012, 2.5.2

Building elements in Wet Areas to be Waterproof or Water Resistant to the NCC
≥ 1 : 100 fall in Membrane to Drainage Outlet^{AS 4654.2:2012, 2.5.2}
Structural Substrate or Screed to form the required Falls
Design & installation in accordance with AS 4654.1
Membrane movement Class I, II, or III
To suit intended service conditions
Substrate to be smooth, clean, dry & dust-free
Fillets & Bond Breakers installed on all corners
Lay & allow to cure as per Manufacturer's Recommendations

AS 4654.2:2012, 2.7

40 x 40mm^{AS 4654.2:2012, 2.7} Sheet Membrane
15 x 15mm^{AS 4654.2:2012, 2.7} Liquid Membrane

Fixings

≤ 600mm CTS^[1]
Seal to prevent water ingress^[2]

Fixing BEST PRACTICE

NCC 2022 V1

Fixing RULES

NCC 2022 V1

All Building Classes

NCC 2022 J5D5, H6V3, & 13.4.4

[2019 J3.4, V2.6.2.3, 3.12.3.3]

May 2023

AS 4654.2:2012, 2.8.3

NCC 2022 HP, 13.4.4

NCC 2022 Vol 1, J5D5 (1)

Building envelope sealing in compliance to NCC J5D5^{AS 4654.2:2012, 2.8.3}, H6, Part 13.4^{NCC 2022 HP, 13.4.4} & AS 4654.2^{NCC 2022 Vol 1, J5D5 (1)}
Seal between sill, packer & Membrane
Seal over fixing head

Manufacturer's System Requirement

AS 4654.2:2012, 2.8.3

≤ 600mm CTS^{Manufacturer's System Requirement}
Seal to prevent water ingress^{AS 4654.2:2012, 2.8.3}

Roof Deck

Balustrade

Film Thickness Test Points

Waterproofing Verification

Falls Verification & Record

NCC 2022 V1

null

Moisture Content Verification & Record

NCC 2022 V1

null

Penetrations