CPD Solutions 2016

References from AS 3740 2010 Amended 2012and AS 4654.2 2012

Presentation by Robert Rath

We t - s e a l

New Parliament House Construction 1983

Robert Rath was supervisor over road construction and waterproofingfor 5 ½ years

Internal Waterproofing to AS:3740 2010 Amended 2012

Design Consideration

Type of Substrate Concrete Screed Structural Flooring (Particle board) Plywood Compressed Fibre Cement Scyon Hebel Others (e.g. Screed Super, Strand board, Modak board

Eternit system floor)

Basic overview 70% water based

15% resin (petroleum base)

15% other-bitumen, polyurethanes, epoxies

Names given; Ardex, Davco, Mapei, Bostik,

Crommelin (Termidry)

Main Domestic Products used in AustralianWaterproofing

ProductsWaterbasedresin

other

AS 3740 2010 amdt 2012

Internal waterproofing

AS 3740 2010 amdt 2012

AS 3740 2010 amdt 2012

Actual floor presented to be waterproofed from SA builder

AS 3740 2010 amdt 2012

Actual floor waterproofed by a waterproofing contractor Non–compliant to the NCC

AS 3740 2010 amdt 2012

AS 3740 2010 amdt 2012

Substrate that meets the requirements with bond break tape

AS 3740 2010 amdt 2012

Fall to waste outlets

AS 3740 2010 amdt 2012

AS 3740 2010 amdt 2012

Bond breaker required on structural floor substrates and all floor to wall junctions

AS 3740 2010 amdt 2012

In general water based membranes require a minimum of 48 hours prior to tiling (there are exceptions)

AS 3740 2010 amdt 2012

Drainage flanges are required in all circumstances

AS 3740 2010 amdt 2012

Correct detailing into the underside of channel drains

AS 3740 2010 amdt 2012

Incorrect Drainage

AS 3740 2010 amdt 2012

Membrane under stainless into drainage flanges

AS 3740 2010 amdt 2012

Installed drainage flange

AS 3740 2010 amdt 2012

A water stop is required under bath lips

AS 3740 2010 amdt 2012

Requirements for baths that have showers over them

For baths that do not have an integral edge detail to allow for a vertical termination of thewaterproofing, there shall be full waterproofing at the walls and floor area and waterproofingunder the bath. The enclosed space under the bath shall be ventilated.

NOTE: Ventilation is required to allow evaporation of water leaking around the edge of thebath into the enclosed airspace under the bath.

AS 3740 2010 amdt 2012

HUMDINGER KITS WASTE CONNECTORS - OVERFLOW • Cut 40mm DWV pipe to desired length and

push into Humdinger elbow. • All rubber ring joints, no gluing required. • Drill out nipple to connect overflow. • Overflow connection can be drilled out to

accommodate overflow.

AS 3740 2010 amdt 2012

Humdinger

AS 3740 2010 amdt 2012

Plastec Humdinger

AS 3740 2010 amdt 2012

Water stop angle required under bath lip

AS 3740 2010 amdt 2012

A water stop is required under bath lips

AS 3740 2010 amdt 2012

Water stop angle required on edge of stepdown

AS 3740 2010 amdt 2012

Water stop angle required at door entry or 1500mm from rose outlet (NOTE a minimum of 15mm)

AS 3740 2010 amdt 2012

Hobless shower - water stop angle required(NOTE a minimum of 5mm above final finish)

AS 3740 2010 amdt 2012

Water stop angle required to be installed and waterproof to top of angle

AS 3740 2010 amdt 2012

Enclosed shower screen placement (NOTE SHALL be installed flush with inside edge of hob)

AS 3740 2010 amdt 2012

Hob shower - water stop angle required(NOTE a minimum of 5mm above final finish)

Testing shower area for leaks

Shower screen installed on the external side of hob Non-compliant with NCC (will fail over time)

Testing shower area for leaks

Internal side of hob showing high moisture readings

Testing shower area for leaks

External side of hob high moisture

Testing shower area for leaks

Setting up visual moisture test

Testing shower area for leaks

Test under way (water leaking from behind tile and through grout) (less than 2 minutes)

Testing shower area for leaks

Test under way (water leaking from behind tile and through grout (less than 2 minutes)

Testing shower area for leaks

2nd test shower prior to owner using after 1st test

Testing shower area for leaks

2nd test shower prior to owner using after 1st test

Waterproofing Failures

Incorrect application of waterproofing, lack of knowledge on National Construction Code requirements, Hobs, Penetrations, Incorrect positioning of shower screen, not waterproofing full floors on unenclosed shower areas, laying membranes on high moisture concrete or screed, not having the Waterstop angle installed correctly (e.g. allowing tiler to install incorrectly).

Tradespersons carrying out works on or above unprotected membrane and damaging membrane.

Builders applying pressure to have tiles laid before the manufactures recommended cure time. (Legal requirement, complying to manufacturers specifications data, Newcastle Builder and Telecom case NSW). Tiler screeds above the flashing.

Tilers cutting out water stop angles and re-positioning without complying to the Code.

Grout hard up against membrane (cuts through membrane). Screed hard up against membrane (movement abrasive to the membrane).

Causes

Waterproofing of Decks and Balconies to

AS: 4654.2 2012 requirements

Suitable Substrates

• Comply with AS: 3600• Type of finish prior to membrane application (e.g. Wood float finish) • Minimum 1:100 Fall• Drip line

Concrete

• Comply with AS 1684 (all parts)• Minimum 1:100 Fall• AS/NZS 2269 (Staggered sheets required)

Timberplywood

• AS/NZS 2908.2 • or ISO 8336• Minimum 1:100 fall

Cellulose – cement products

Waterproofing of Decks and Balconies to AS:4654 Requirements

Design Consideration

Type of Substrate Concrete Plywood Compressed Fibre Cement Scyon Hebel Others (e.g. Screed Super, Strand board, Modak board,

Eternit system floor) Note: Particle Board or Tile and Slate Underlay is not

acceptable.

Waterproofing of Decks and Balconies to AS:4654 requirements

Class of Membrane

Class 1 membrane: Normally strong and rigid, elongation at break less than 60%. Class 2 membrane: More flexible with elongation at break less than 300%. Class 3 membrane: Highly flexible, elongation at break greater than 300%.

Waterproofing of Decks and Balconies to AS:4654 requirements

Service Conditions

Ultra violet light can damage some membranes and protection is required (e.g. Tiles over the membrane or roof garden over the membrane).

Local environment conditions can effect membranes and the range of temperatures vary from -150C to +850C.

Low temperatures may reduce elongation and high temperature can cause softening of the membrane.

Water immersion for long periods may result in degradation of the membrane (what is the water absorption in membrane?).

Chemicals may effect some membranes (e.g. fertilizers, orange/citrus).

Waterproofing of Decks and Balconies to AS:4654 Amended 2012

AS:4654 Membrane for above ground usage AS:4654.1 Materials AS:4654 .2 Design and installation

Waterproofing of Decks and Balconies to AS:4654 requirements

Types of Membrane Systems

A membrane system that is weighted down by ballast or other finishes (ballasted membranes).

Liquid membranes or systems with full bonding to the substrate (fully bonded membranes).

Membrane system that uses ballast insulation over them (IRMA) (e.g. Australia’s New Parliament House roof area).

Membranes that are fastened to the substrate (mechanically fixed) (e.g. high wind roofs).

Membranes that are only partly bonded to the substrate (partially bonded) (e.g. may be used in areas where extra movement is required).

Considerations

Applicator competent. Knowledge of the Australian Standard and NCC. The Builders knowledge of substrate requirements. The Builders knowledge of weather conditions and the effects on membranes. The cost of getting it wrong (e.g. if a deck cost $1200 to waterproof, then you can expect a minimum of

$9,500 as a starting point, and if a person lost their life due to a catastrophic failure that was instigated by the membrane failing, then no cost can replace the persons life).

Builder reputation!!! The disturbance to your clients home and lifestyle. Scaffolding. Work hours lost by all parties.

Type of Membrane?

Torch on Membrane Bituminous MembraneLiquid Membrane

ConsiderationsAS:4654.2 2012

Termination Heights

Type of Membrane?

Wet-seal Enviro-coat DS 411 Liquid Applied Completely reinforced with fabric

throughout the entire system

Thermoplastic Example: Sarnafil Hot Weld

Wet-seal Enviro-coat DS 411 Membrane turn up and under door

frame sill detailing All movement joints detailed

ConsiderationsFinishes and UV Protection

Level entry and Preparation

Level Entry Detail referenced from AS 4654.2

Post Penetration Correct detailing is a MUST

Protection Correct planning to limit damage

to membrane

Correct Drainage

Correct Drainage

Waterproofing Failures

Bituminous Membrane Reason: Workmanship Incorrect detailing

Sheet Membrane Reason: Workmanship Incorrect detailing

Torch on Membrane Reason: incorrect acceptance of

substrate Incorrect levels (ponding water)

and poor workmanship

Waterproofing Failures

Water migration behind the membrane through grout.

Waterproofing Failures

Water Migration from Door Sill

Reported as Membrane Failure Incorrect report

Internal Flooring Timber not affected

Damage to Membrane

Supervisor Brain Failure

Supervisor advised contractor ready to go!

Supervisor Brain Failure

Advised contractor job ready to have membrane applied Advised contractor job

ready to have membrane applied

Supervisor Brain Failure

Presented to Contractor

Common Issues that Lead to Waterproofing Failures

Penetrations, post, railings and service units fitted after the membrane has been laid without notifying the installer!

Tradespersons carrying out works on or above unprotected membrane.

Builders applying pressure to have the job done when adverse weather conditions will or are likely to be present.

Capillary (e.g. drip angle hard up against the external fascia (min. of 6mm offset required), wall sheeting down into screed bed).

Tiler screeds above the flashing.

Tiler installs tiles without movement joints or expansion joints (interferes with floor to wall membrane movement details).

Grout hard up against membrane (cuts through membrane).

Screed hard up against membrane (movement abrasive to the membrane).

Causes

Good Design To Accommodate Aesthetics

Membrane flashed up over 120mm behind cedar cladding. Powder coated 50mm angle on internal side of external doors.With waterproofing to top of angle, weep hole/drainage at base of door sill.

Good Design and Project Management

Be aware of new products and testing of compatibility

Protection Scyon Code

Australian Standard

Internal or External

Testing

Scyon is becoming one of the main movers

Membrane to Substrate Testing

Actural Testing of Membrane to Substrate

Good Practice

Steps

To meet Building Code and AS 4654

ProtectionArchitectural design for client

For Code

Australian Standard

Membrane fit for purpose

Consideration

Manufacturer specificationand Builder/Supervision

Finish product protection

Duty of Care