Roof Slab Penetrations Building Codes & Rules
- Roof Slab Penetrations Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
≥ 100
Anchor Point
- Fully waterproofed & fully sealed
- Chemical anchor
Anchor Point
NCC 2022 V1
- Fully waterproofed & fully sealed
- Chemical anchor
M
Drainage Cell
Fillet
M
M
M
M
Ballast
Pipe
Install Fire Stopping / Collar if required
≥ 75mm embedment
to Chemical Anchor
or as Engineer requires
M
M
M
M
≥ 100
≥ 50
Geo-Filter Fabric
Reinforcement
- copyDrainage Cell
≥ 100
Conduit
Slip Sheet
Fillet Around
Pipe
Fillet Around
Reinforcement
M
Fillet Around
Conduit
Stainless
Steel Anchor
Baseplate over neoprene Gasket
M
Fillet
Fillet Around
Reinforcement
Reinforcement
- Avoid clashes with Services or Starter Bars
- Locate Post Tensioned Tendons if applicable
M
M
M
M
M
M
M
Pipe Penetration
- Space between pipes to facilitate installation of membrane ≥ 100mm
- Membrane turn up pipe at plinth base ≥ 50mm
- ≥ 75mm spacing from plinth edges
Pipe Penetration
NCC 2022 V1
- Space between pipes to facilitate installation of membrane ≥ 100mm
- Membrane turn up pipe at plinth base ≥ 50mm
- ≥ 75mm spacing from plinth edges
Pipe Penetrations
- ≥ 100mm clearance between pipes to assist membrane installation
- ≥ 50mm Membrane turn up pipe at plinth base
- ≥ 75mm from plinth edges for larger penetrations
Pipe Penetration
NCC 2022 V1
- ≥ 50mm Waterproofing membrane and U.V. stable elastomeric coating returned up pipe
- 316 grade stainless steel jubilee clip
- Falls to top of Plinth to shed water
- ≥ 100mm clearance between pipes to assist membrane installation
- ≥ 50mm Membrane turn up pipe at plinth base
- ≥ 75mm from plinth edges for larger penetrations
150
≥ 50
≥ 100
≥ 50
Conduit Penetrations
- ≥ 100mm spacing between conduits
- Membrane turn-up to Conduit
- ≥ 25mm for Primed & Liquid Applied Membrane, or
- ≥ 50mm for Stainless Steel clamped collar over either Liquid or Sheet type Membranes
- ≥ 50mm from plinth edges
Conduit Penetrations
NCC 2022 V1
- Plastic conduits cast into hob and turned down 180°
- After cables are pulled through seal the end
- ≥ 100mm spacing between conduits to assist installation of membrane
- ≥ 25mm waterproofing membrane up conduit
- Seal base of conduits
- ≥ 50mm from plinth edges to prevent cracking
- The base of conduit to be fully sealed
- U.V. stable elastomeric coating to protect membrane
- ≥ 100mm spacing between conduits
- Membrane turn-up to Conduit
- ≥ 25mm for Primed & Liquid Applied Membrane, or
- ≥ 50mm for Stainless Steel clamped collar over either Liquid or Sheet type Membranes
- ≥ 50mm from plinth edges
Anchor Point
- Fully waterproofed & fully sealed
- Chemical anchor
Anchor Point
NCC 2022 V1
- Fully waterproofed & fully sealed
- Chemical anchor
Anchor Point
- Fully waterproofed & fully sealed
- Chemical anchor
Anchor Point
NCC 2022 V1
- Chemical anchor as specified by structural engineer
- First membrane, installed before anchor point
- Primary membrane, applied after installation of anchor point
- Fully waterproofed & fully sealed
- Chemical anchor
≥ 25
≥ 25
Ballast
Reinforcement
M
Fall
M
Slip Sheet
Post Supports
- Hot dip gal corrosion protection
- Membrane turn up post at plinth base ≥ 100mm
- Dry pack under base plate
M
Concrete Plinth
≥ 50
Tools™ Best Practice
Membrane TerminationTools™ Best Practice
- ≥ 50mm Membrane Upturn
- Stainless Steel Clamped Collar
Conduit Penetration
- ≥ 100mm spacing between conduits
- Membrane turn up conduit at plinth base ≥ 25mm
- ≥ 50mm spacing from plinth edges
Conduit Penetration
NCC 2022 V1
- ≥ 100mm spacing between conduits
- Membrane turn up conduit at plinth base ≥ 25mm
- ≥ 50mm spacing from plinth edges
Tools™ Best Practice
Membrane TerminationTools™ Best Practice
- ≥ 50mm Membrane Upturn
- Stainless Steel Clamped Collar
Industry Recommendation, -
Industry Recommendation, -
150
≥ 50
Industry Recommendation, -
≥ 100
Conduit Penetration
- ≥ 100mm spacing between conduits
- Membrane turn up conduit at plinth base ≥ 25mm
- ≥ 50mm spacing from plinth edges
Conduit Penetration
NCC 2022 V1
- ≥ 100mm spacing between conduits
- Membrane turn up conduit at plinth base ≥ 25mm
- ≥ 50mm spacing from plinth edges
Industry Recommendation, -
Industry Recommendation, -
Industry Recommendation, -
Industry Recommendation, -
Industry Recommendation, -
Fixing
≥ 50
Pipe Penetration
- Space between pipes to facilitate installation of membrane ≥ 100mm
- Membrane turn up pipe at plinth base ≥ 50mm
- ≥ 75mm spacing from plinth edges
Pipe Penetration
NCC 2022 V1
- Space between pipes to facilitate installation of membrane ≥ 100mm
- Membrane turn up pipe at plinth base ≥ 50mm
- ≥ 75mm spacing from plinth edges
Post Base
- Prime cut end & allow drainage gap under Post[1]
- Upturn Membrane to prevent water penetration[2]
- Clamped seal to Sheet Membrane
- Chemical seal Liquid Membrane
Post INSTALLATION
NCC 2022 V1
Fixings
NCC 2022 V2
Post INSTALLATION
NCC 2022 V1
All Building Classes
NCC 2022 H2D8 [2019 3.8.1.3]
May 2023
NCC 2022 Vol 2, H2D8
AS 4654.2:2012, 2.8.4
- A Roof, Balcony, Podium or similar horizontal surface must be waterproofed to the NCCNCC 2022 Vol 2, H2D8
- Post Base InstallationAS 4654.2:2012, 2.8.4
- Install Post Base before Membrane placement
- If placed onto a completed Membrane, repair any damage
- Durable timber or metal Post
- Isolate Membrane from Vibration or Movement to prevent damage
AS 4654.2:2012, 2.8.4
AS 4654.2:2012, 2.8.4
- Prime cut end & allow drainage gap under PostAS 4654.2:2012, 2.8.4
- Upturn Membrane to prevent water penetrationAS 4654.2:2012, 2.8.4
- Clamped seal to Sheet Membrane
- Chemical seal Liquid Membrane
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