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Refer to the general section 1232 INTERPRETATION & DEFINITIONS for abbreviations and definitions used throughout the specification.

The following abbreviations apply specifically to this section:

Refer to the general section 1233 REFERENCED DOCUMENTS. The following documents are specifically referred to in this section:

Manufacturer and supplier documents relating to this part of the work:

Waterproofing Systems NZ Ltd Gripset Product Manual (2020 edition)

Standard detailed drawings

Gripset Product Data Sheets
BRANZ Appraisal 469 - Gripset® 38 and Gripset® 2P External Waterproofing Membranes
BRANZ Appraisal 470 - Gripset® 38 and Gripset® 2P Wet Area Membranes

BRANZ Appraisal 1191 - Gripset® 38FC and Gripset® 2P External Waterproofing Membranes

BRANZ Appraisal 1192 - Gripset® 38FC and Gripset® 2P External Waterproofing Membranes

Supplier contact details

Provide a material manufacturer/supplier warranty:

• Provide this warranty on the manufacturer/supplier standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT)
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for additional requirements.

Provide an installer/applicator warranty:

• Provide this warranty on the installer/applicator standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT)
• Commence the warranty from the date of practical completion of the contract works.
• Substrate Readiness Checksheets have been completed
• Supply completed QC Checksheets on completion
• Provide a PS3 on completion to the main contractor

Refer to the general section 1237 WARRANTIES for additional requirements.

Liquid waterproofing work to be carried out by experienced and fully qualified applicators approved by Waterproofing Systems NZ Ltd to install the Gripset® 2P & Gripset® 38FC membrane system who hold a current Licensed Building Practitioner's licence for external membrane applications.

The applicator must complete the Quality Control Checksheets as the job progresses for presentation with the warranty application.

Substitutions are not permitted to any specified Gripset® Waterproofing System or associated components and products.

Provide a priced proposed maintenance contract for the ~

Provide the following compliance documentation: -

• Current WPS Applicators approval certificate
• Applicators current LBP certification
• Manufacturer / supplier warranty
• Installer / applicator warranty
• Producer Statement - Construction from the applicator / installer
• Producer Statement - Construction Review from an acceptable suitably qualified person
• Other information required by the BCA in the Building Consent Approval documents.

Accept responsibility for the watertight performance of the completed membrane system including all penetrations.

Main contractor to convene a meeting between the applicator and all associated consultants.  Ensure all parties have reviewed the plans and detailed drawings, specification and fully understand and know what is required for effective performance of the system.

Where a standard WPS detail does not exist, or if a standard detail cannot be applied, an approved alternative must be obtained from Waterproofing Systems NZ Ltd before proceeding with the installation and submitted to the contract administrator for approval.

Dam up at the rainwater droppers, wet area water outlets to a depth of 40mm and flood test for 8 hours.  Make good any lack of water tightness when the surface is completely dry.  Flood testing can only be done 48 hours after the installation of the membrane.

Maintain quality necessary to assure that work is performed in accordance with this specification, the Waterproofing Systems Gripset SBR Liquid Waterproofing Product Manual recommendations, plans and detailed drawings for the project.

Ensure that the applicator's QC Checksheets are completed fully and faithfully for each installation area.

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WPS C Screed, a polymer enhanced water-resistant high bonding screed.  Screeds can be formed from 2mm to 80mm.  Supplied in 20kg bags.

Gripset® DM premium grade mortar producing a fine feather finish to zero which can be used with the WPS C Screed to create a zero finish to outlets.  Supplied in 20kg bags.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for Tile & Slate underlay sheets.

Gripset® GP Primer, a water based fast drying single part primer and bonding agent for adhesion to porous surfaces.  Coverage 6-8m² per litre, supplied in 15 litre pails.

Gripset® OP primer, a single part smooth surface primer used for priming Sycon Secura boards, aluminium, plastic, stainless steel and RAB board finishes.  Supplied in 5 and 15 litre pails.

Gripset® P10 a single part penetrating primer and vapour barrier against rising damp and active moisture. Supplied in 10 litre cans.

Gripset® E60, a two-component water-based epoxy system suitable for use as both primer and prevention of moisture penetration and rising damp.  Gripset® E60 provides both positive and negative hydrostatic pressure resistance.  Supplied in 10 and 20 litre kits (2-part system) with an approximate coverage of 3m² per litre.

Gripset® 11Y, a specialized additive primer and bonding agent which is used for a slurry primer and membrane protection coatings.  It is also used in WPS C Screed to enhance screed strength and provide flexible and waterproofing resistance within the screed.  Supplied in 15 litre pails.

Gripset® 2P, a two-part water based flexible waterproofing SBR membrane system comprising of Gripset® 2P liquid component plus 2P dry powder.  Quick curing in cooler conditions.  Complies with AS/NZS 4858, as a Class II membrane.  Supplied in 15 kg bags and 2P liquid in 10 litre pails.

Gripset® 38FC a single pack water based flexible waterproofing SBR membrane system which is quick curing.  Complies with AS/NZS 4858, as a Class III membrane.  Supplied in 15 litre pails.

Gripset® rubberised bond breaker prefabricated 90º internal corners, size 200mm x 200mm x 120mm.  Provides an elastic rupture resistant seal at internal corner junctions.  Performs as part of the bond breaker in the application of Gripset® 38 and Gripset® 2P.

Gripset® rubberised bond breaker prefabricated 270º external corners, size 200mm x 200mm x 120mm.  Provides an elastic rupture resistant seal at external corner junctions.  Performs as part of the bond breaker in the application of Gripset® 2P and 38FC.

Gripset® rubberised B50 jointing band for sealing wet area wall/floor and wall/wall junctions, in conjunction with internal and external corners.  Rupture resistant and waterproof.  Performs as part of the bond breaker in the application of Gripset® 2P and 38FC membranes.  Supplied in 120mm wide x 50m long rolls.

Self-adhesive butyl rubber-based reinforcement tape with an external fleece finish used over non-porous surfaces, used for substrate joints, abutments, junctions, before the application of Gripset® 2P and 38FC membranes.  Supplied in 80mm wide x 10m long rolls.

Gripset rubberised pipe collar, an elastic, waterproof, rupture and vibration proof seal, for sealing of pipes and penetrations on vertical and horizontal surfaces.  Applied prior to application of Gripset® 2P and 38FC membrane.
Supplied in 3 sizes;

• small 120mm x 120mm
• medium 250mm x 250mm
• large 300mm x 300mm

RF Tape, a non-woven polypropylene fabric embedded in liquid membranes for areas where reinforcement is required against minor shrinkage cracks or where enhanced tensile strength is needed.  Supplied in 100mm wide x 100m long rolls.

WPS MS40, high strength sealant used for termination flashings, expansion joints and adhesion of fixtures to Gripset® 2P and 38FC membrane.  Supplied in 600ml sausages.

Allproof Vinylrite or Aquaknight ring clamp droppers with a PVC base, brass screw fixed ring clamp and leaf guard combination or a tiled finish grate.  Supplied in 80mm, 100mm and 150mm diameter outlet sizes.

Allproof Vinylrite or Aquaknight ring clamp dropper overflows with a PVC base, brass ring clamp and brass overflow leaf guard combination or a tiled finish grate.  Supplied in 80mm, 100mm and 150mm diameter outlet sizes.

Vision shower channel series stainless steel channel and grate system with selection of finishes.  Stock lengths 800mm, 900mm and 1200mm.

Waterproofing Systems Type 316 Stainless steel or aluminium scupper outlets (to NZBC E2/AS1) designed to be recessed into substrates flush with the substrate surface.  Available in 200mm wide x 75mm high with 300mm long outlet throat.

Waterproofing Systems scupper overflows designed to be recessed into substrates flush with the substrate surface.  Available in 100mm x 100mm with 400mm long outlet throat.

Allproof overflow sump with an integral overflow outlet, designed to be recessed into concrete or plywood substrate surfaces flush.  The sumps are supplied with a riser fitting for the overflow outlet.  Outlet sizes are 80mm, 100mm and 150mm diameter.

The underfloor tile heating system once installed onto the substrate must be overlaid with Gripset DM & 11Y mix covering the entire heating system before the Gripset® 2P or 38FC membrane system is installed.

With slope correction designed for structural tiles or timber raft systems.

Construction Chemicals Monoflex tile adhesive and grout system or alternatively an approved polymer modified cement based adhesive classification C2S2TE.

Refer to 1270 CONSTRUCTION for requirements relating to delivery, storage and handling of products.

Refer to 1250 TEMPORARY WORKS & SERVICES for protection requirements.
Refer to 1270 CONSTRUCTION for requirements relating to defective or damaged work, removal of protection and cleaning.

Check work previously carried out and confirm it is of the required standard for this part of the work.

Comply with the requirements and instructions of Waterproofing Systems Gripset Product manual, detailed drawings, data sheets, method statements and specifications.

If damaged or not satisfactory, do not commence work until the affected area is rectified.  Commencement of installation constitutes acceptance of site conditions.

Refer to the general section 1270 CONSTRUCTION for general requirements.

Prepare backgrounds to AS 3958.1, 4 and in accordance with Waterproofing Systems Gripset Product manual installation, and the product manufacturers instructions for the selected substrate.

Ensure that the substrate is in a suitable condition to allow work of the required standard and will comply to NZBC E2/AS1 for the relevant substrate and Waterproofing Systems NZ Ltd Gripset Product manual requirements.

Ensure that the substrate construction is well braced against movement and deflection and structurally sound.  Ensure that the substrate falls to the rainwater/water outlets and water must not pond.  Ensure all surfaces are clean, dry and free from dust and dirt, oils or grease with no projections of sharp materials.

Acid etch and/or diamond grind concrete surfaces as required to achieve a suitable surface.

Remove projections and all debris, leaving the surface dust-free, laitance free, oil-free and clean, with nothing that could diminish the adhesion of primers.  Grind off steps or sharp protrusions caused by formwork joints.  Ensure that the substrates are sound and dry, and there are no concrete additives or release agents that could affect the adhesion of membrane.

Refer to the Waterproofing Systems Substrate Readiness Checksheet for guidance, refer www.waterproofing.co.nz.

Vacuum when preparation is complete to remove all dust.

Generally concrete surfaces are prepared via mechanical abrasion such as scabbling, grinding or shot blasting to a clean, sound surface.  The surface requires preparation to expose the aggregate to enable a good mechanical key for subsequent applications.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for preparation and repair of floor substrates.

Ensure fibre cement sheeting is wet area grade and is suitable for installing the membrane (refer to Sheet manufacturers details for correct fixing, thicknesses and sheet layout).  Minimum Type B, Category 3.With primed/sealed face and edges.

Requirements if used for:

Prime the substrate with the selected primer in accordance with the manufacturer's requirements.  Allow primers to fully dry in accordance with relevant Gripset® product installation requirements.

• for dry porous substrate use Gripset® GP primer
• for light moisture substrates use Gripset® P10
• for damp substrates use Gripset® E60
• for metal and smooth surfaces use Gripset® OP primer
• for old existing or remediation use Gripset® 11Y slurry primer

Install WPS C Screed and/or Gripset® DM screed in accordance with manufacturer's installation requirements.  Form screeds with a deviation from plane of not more than 5mm over 3 metres.

Form screeds in areas where water is used in significant amounts with a deviation from plane of not more than 5mm over 3 metres.  Unless otherwise specified form screeds with the following minimum fall gradients to BRANZ Good Practice Guide: Tiling, 6.5 Falls in floors.

Waterproof areas to NZBC E3/AS1, AS 3740 and BRANZ Good Practice Guide: Tiling, and Waterproofing Systems NZ Ltd recommendations.

Ensure that the dry film thickness specified in the Waterproofing Systems NZ Ltd Gripset Product manual and specifications is achieved, including additional requirements of the bond breaking detailing.

Apply Gripset® 2P or 38FC liquid membrane only in fair weather with surface temperatures above 6°C and below 25°C.

Co-ordinate and install to suppliers and Waterproofing Systems NZ Ltd requirements.

Where required, install the selected dropper or scupper outlets and overflows at the lowest point of the deck, or internal floor waste, recessed into the substrate just below flush with the substrate surface.  Prime with Gripset® OP primer before the Gripset® 2P or 38FC application commences.

Mix Gripset® 2P in accordance with manufacturers instructions.  Slowly pour Gripset® 2P dry powder into the liquid while mixing with a slow speed electric stirrer.  Mix thoroughly ensuring the solids content is evenly dispersed throughout.

Pour approximately 50% of the Gripset® 38FC into a clean pail and stir before application to ensure the solids content is evenly dispersed through the liquid.

Install Elastoproof rubberised pre-made corners, pipe penetration collars and tapes using the Gripset® 2P ensuring the fleece sections are saturated and bonded to the substrate.

Apply a minimum of 2 coats Gripset® 2P or 38FC, with a total minimum coverage of 1.5 litres/m2 wet film thickness, forming an approximate dry film thickness of 1.2mm/m2.
Calculate accurately the amount of Gripset liquid membrane required for the area to be waterproofed to ensure the correct dry film thickness is reached.

Allow extra Gripset liquid membrane to install the Elastoproof® bond breaker tapes and corners to ensure the general membrane film thickness is not compromised.

Where tileJAK® pedestal system is to be installed over the Gripset® 2P system, apply 2 coats of the Gripset® 11Y slurry in accordance with manufacturers installation instructions, as protection against scuffing and mechanical damage and regular maintenance/cleaning.

Where Gripset® 2P is not covered with trafficable finishes, prime the Gripset® 2P with Gripset® GP primer and apply 2 coats of Gripset® P39 as the UV and protection coating.  Where Gripset® 2P will be directly exposed to traffic, fully sand blind the Gripset® P39 for hard wearing protection.

Apply Gripset® 2P to a DFT of 1.6mm in potable water applications followed by 2 coats of Gripset® 11Y slurry for membrane protection during cleaning.  Allow the new membrane to cure for a minimum of 14 days before filling the tank.

Use WPS MS40 sealant adhesive with Gripset® 2P or 38FC SBR systems.  Ensure the membrane is clean and free from contaminants before applying the WPS MS40 sealant.

Do not leave membrane exposed for prolonged periods to UV light and the possibility of mechanical damage.  Protect the completed membrane system from mechanical damage until tiling begins.  Apply the tiling/overlay once the Gripset® 2P or 38FC membrane is dried and fully cured.  Drying times are variable depending on local climatic conditions, in cold damp conditions allow for longer drying time.

Refer to 7553 UNDERFLOOR HEATING MAT SYSTEM for installation of under tile heating.

Refer to Waterproofing Systems tileJAK system.

Refer to Waterproofing Systems tileJAK system.

Install Construction Chemicals Monoflex tile adhesive system in accordance with manufacturers instructions.

Refer to 1270 CONSTRUCTION for completion requirements and if required commissioning requirements.

Refer to 1270 CONSTRUCTION for general test and certification requirements at completion.
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Ensure INSPECTIONS clause is included to complement this clause.

• Arrange for an inspection of the completed waterproof membrane work.
• Substrate Readiness Checksheets have been completed.
• Supply completed QC Checksheets with the warranty application.
• Protect the membrane until completion of the contract works.

Refer to Waterproofing Systems tileJAK system
Height range for tiles:  14mm to 180mm

Refer to Waterproofing Systems tileJAK system
Height range; 14mm to 180mm plus extensions