WATERPROOFING OF DOMESTIC WET AREAS AS 3740 – 2010 Compliance & Inspections ½ Day Course BCA Requirements Building Code of Australia ( BCA ) reference AS 3740 – 2010 and Amendment 1 – 2012 as the technical Deemed to Satisfy building solution. BCA and AS3740 are minimum mandatory requirements. BCA Table 22.214.171.124 and AS 3740 Table C1 provide waterproof and water resistant requirements for designated wet areas. BCA Requirements Waterproof Material − A material that is impervious to moisture Water Resistant Material − A material that will not deteriorate when exposed to moisture The 2 Things Performance requirements by BCA Vol 1 FP 1.6 and Vol 2 P 2.4.1 Class 1 to 10 “To protect the structure of the building and to maintain the amenity of the occupants, water must be prevented from penetrating a) behind fittings and linings; or b) into concealed spaces of sanitary facilities, bathrooms, laundries and the like” Class 2 to 9 “Overflow…must be prevented from penetrating to – another sole occupancy unit… - public areas…in a storey below in the same building.” KEEP WATER CONTAINED WITHIN THE DESIGNATED WET AREA ! . BCA Compliance Designated Wet Areas ( Table C1 ) − Shower – High Risk − Bathroom, Ensuite – Medium Risk − Laundry, Laundrette, W/C – Low Risk THE 2 THINGS AS 3740 – 2010 Section 2 lists − Waterproof & Water Resistant Substrates − Waterproof & Water Resistant Linings Compliant substrate and surface lining materials must be used in combination. USE ONLY COMPLIANT WATERPROOF & WATER RESISTANT MATERIALS IN WET AREAS !! Materials in Combination Lamipanel on non-compliant W/R Board installation WR Board exposed AS 3740 – 2.4 Compliant Materials Compliant Materials Substrate o o o o o o Concrete Compressed F/C sheeting Render ( with WP additive) Masonry WR plasterboard (W Proofed) Structural timber floor ( W Proofed) Lining o o o o Thermoset laminated sheeting & pre-decorated f/c sheeting Tiles ( ceramic, stone, composite) Welded sheet vinyl Sanitary grade acrylic wall linings Non-Compliant Materials Non – compliant materials Plaster setting/topping − − − no setting or joint fixing in high risk areas waterproof horizontal joints/external corners. seal all mechanical fixings. Timber door/window reveals & mouldings − − waterproof window reveals/remove architraves. seal against adjacent door trims. Untreated masonry/render − “Render to be waterproofed to prevent moisture movement by capillary action or wicking” − Fully waterproof rendered shower walls to 1800mm from FL Incompatible materials − − − − primer/membrane/adhesives/sealants. suitability of materials according to design test tiles for shadowing the right sealant for the job. Non-Compliant Materials Plaster set nib wall Timber adj shower Extent of Application Extent of Application Extent of Application Extent of Application Extent of Application Critical Reference Points Reference points for extent of application − Finished Floor Level (FFL) Height − Shower Rose Connection Lateral & Height − Shower Screen Designates high risk area Class Exercise 1 Extent of Application Does this comply with extent of application? ______________________________ ______________________________ Why / Why not ? ______________________________ ______________________________ What materials should be used in the designated risk area? ______________________________ ______________________________ ______________________________ Compliance Inspections Builder is responsible to supervise trades and ensure building is compliant with BCA Visual inspections should be conducted throughout construction stages Substrate (pre-waterproofing) Membrane application Completion Compliance Inspections Substrate Taps, mixers, rose toilet penetrations sealed Water mark compliant drainage flanges fitted Wall/floor sheeting fixed to manf. Specs and no damage (9mm f/c for large format tiles) Baths/trays supported and no damage Substrate Penetrations 3.10 &Table C1 Where a penetration passes through a waterproof or water resistant construction, the penetration shall be waterproof. Penetrations include: - Substrate fixings - Taps, rose and mixers - Screens and fixtures - Toilets, shelves and fittings. Substrate Penetrations 3.10 Taps sealed at substrate to combination Penetrations for taps, shower nozzles, recessed soap holders and similar fixtures shall be waterproofed by sealing with a proprietary flange system or sealant. When sealing the tap body to the wall, allowance shall be made for servicing of tap washers or ceramic discs without damaging the seal. Substrate Baths and Spas 3.8 Island Bath - Unsupported Baths and spas shall be supported to prevent distortion and cracking. When recessed into the wall: water resistant surface materials to pass down inside the rim of bath When installing baths the integrity of the structure shall be maintained Hob Construction Hob construction shall be of masonry, concrete, corrosion resistant metal or similar material. Autoclaved aerated concrete (AAC) may be used for internal membrane systems only, and must be primed before membrane application. All gaps, joints and intersections of the hob structure shall be made flush before membrane application. TIMBER MUST NOT BE USED Substrate 3.13.3 Substrate Membrane to Drainage Connection 3.14 Termination to a drainage flange 3.14.1 − A drainage flange shall be installed with the waterproofing membrane terminated at/in the drainage flange to provide a waterproof connection. Where a tile bed or screed is used, the waterproof membrane shall be installed above or below the tile bed or screed. 3.2 Substrate Bond Breakers 3.13.7 Bond Breaker Requirements Bond Breakers are required at all junctions between wall/wall, floor/wall, hob/ wall and movement joints Types of Bond Breakers Class 1 Membrane 0 to 60% −Type 1 Bond Breaker 75mm Class 2 Membrane 60 to 300% −Type 2 Bond Breaker 35mm Class 3 Membrane < 300% −Type 3 Bond Breaker 12mm Take a Break !!! Compliance Inspections Membrane Application Extent of application complies with BCA Table 126.96.36.199 and inspected for defects All penetrations sealed, taps sealed to allow for servicing Dressed to shower, door and hob bath angles All non-compliant materials protected Membrane Application Extent of Waterproofing Appendix C Type 1 & Type 2 Unenclosed Shower Table C1 Floor waterproofed and dressed to barrier stop Floor /Wall junction waterproofed to 150mm above FFL Penetrations waterproofed Sheet junctions waterproofed to 40mm each side of junction Wall substrate water resistant to 1800mm min. from FFL Type 1 – treatment to spray barrier Type 2 – treatment to 1500mm min from rose connection Membrane Application Perimeter Flashings 188.8.131.52 & 184.108.40.206 Perimeter flashing min 25mm above FFL Dressed to door Angle across cavity – continuous flashing Membrane Application Junctions and Flashings 220.127.116.11 All junctions to be sealed Type 1,2,3,4 & 5 Type 1 W/proof to W/proof Type 2 W/proof to W/Resistant Type 3 W/Resistant to W/Resistant Type 4 Non W/Resistant to W/Resistant Type 5 Full flashing 50mm horizontal leg, 25mm above FFL Vessel at wall junction – sealed prior to tiling Membrane Application Vessels abutting a wall Fig C4 & Table C1 Waterproof wall junction where a vessel is fixed to a wall Water resistant to 150mm above vessel Where vessel is within 75mm of a wall, water resistant to 150mm above vessel , for the extent of the vessel − Applies to wall mount vanities, fitted to wall linings Membrane Application Baths and Spas Table C1 Free standing bath > 75mm from wall Waterproof from floor to 150mm above bath Membrane Application Baths and Spas 3.8 Hob mount baths For insert baths a water stop shall be installed around the periphery Membrane to finish 5mm above finished tile level Barrier angle is not always possible Min. 100mm for shelf from bath edge to finish. Membrane Application Baths and Spas Fig 3.2 Foam backing rod as periphery barrier Membrane dressed to 5mm above Finished Tile Level Membrane Application Baths and Spas 3.8 No Barrier Stop Membrane dressed to Type 2 connector sealant Membrane Application Baths and Spas 3.7.3 Where no vertical membrane termination, full waterproofing under the bath and space to be ventilated. 3.7.4 For freestanding baths with shower over, the extent of waterproofing shall be as for a Type 2 unenclosed shower, ignoring the bath… Membrane Application Drainage Channels 3.14.3 Membrane dressed to puddle flange at lowest point Waterproof drainage shall be continuous for the membrane into the drainage outlet Where the channel does not have an integral 50mm flange for termination of the membrane, the membrane shall be terminated to a drainage flange beneath the channel Class Exercise 2 Compliance Inspections Polished Concrete/ Tiled Walls Does this floor comply with Table C1 & Materials 2.4? Why/Why Not? 1)Floor _______________________ ______________________________ 2)Wall connection ______________ ______________________________ 3)Floor waste __________________ ______________________________ How can we make this wet area compliant with AS 3740-2010? ______________________________________ ______________________________________ ______________________________________ ______________________________________ ______________________________________ Compliance Inspections Practical Completion Inspections Identify all wet areas Extent of application Installation details Practical functionality Practical Completion Inspections Identify all wet areas All wet areas to be waterproofed as per AS 3740 − − − Bathroom, ensuite W/C, powder room Laundry, laundrette, wash cabinet Extent of Application Assess shower category Identify critical reference points Assess material coverage compliant with Table C1 Practical Completion Inspections Installation Details Barrier angles in place − − − − angle present at all showers and wet area doorways Angle visible to top of FFL, 5mm above for Type 1 Periphery barrier at hob mount baths Cavity slider bridged, door angles connected to membrane Penetrations sealed − − − taps, mixer and rose penetrations sealed Waste puddle flanges installed Toilet pan, screen, shelf, grab rail fixings sealed Practical Completion Inspections Waterstop Angle at Shower − Angle across shower entry − Flush with FFL − Capped with ‘D ‘section NO Waterstop Angle to Shower − Tiles not cut beneath screen − Probe test reveals no obstruction : NO ANGLE Practical Completion Inspections Screen penetration sealed with neutral cure silicone Rose connection penetration UN-SEALED Practical Completion Inspections Shower Grate – NO Drainage Flange Connection Shower Screen – Fitted to NON-COMPLIANT materials Practical Completion Inspections Ineffective Falls Water exits shower area • 3.4(b) Falls in shower floors shall be sufficient to prevent… water from discharging outside the shower area Overflow waste required for Class 2 to 9 buildings BCA Vol. 1 FP 1.6 Overflow from a bathroom, laundry facility or the like must be prevented from penetrating to… in a storey below in the same building: (a) Another sole occupancy unit used for sleeping accommodation (b) A public space • Practical Completion Inspections Practical Functions Design − − Design compliant with approved plans and variations Design suitable for intended use: disabled access; slips and falls; grab rail positions Falls − − − 1:100 for main floors and enclosed showers 1: 80 for open-unenclosed showers Falls to waste, no ponding, not exit shower under normal use Tiling Compliance − − Lippage: 1mm rectified stone, 1.5mm rect tiles, 2mm cushioned edge tiles Joint alignment + 2mm over 2m Maintenance − Run water : no blockage to wastes Waterproofing Certificates Waterproofing Application Certificates Certificate to be issued upon request from surveyor To certify compliance with BCA and AS 3740-2010 To include: − − − − Extent of application Product used with classifications Material info such as curing, compatible adhesives etc.. Declaration of compliance with AS 3740 - 2010 To be issued by competent person with either trade licence or formal trade qualification Class Exercise 3 Practical Completion Inspections Shower / Bath 700mm screen Classify the wet area, nominate extent of application & Identify 5 indicators of compliance in the photo ? Classification of wet areas -----------------------------------------------------Extent of application -----------------------------------------------------Application details/ defects? Floor______________________ Shower____________________ Bath_______________________ Doorways__________________ Vanity_____________________ QUESTIONS?