Refer to ~ for ~

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’s and supplier’s documents relating to this part of the work:

Waterproofing Systems NZ Ltd Gripset Product Manual (2016 edition)

Standard detailed drawings

Liquid Membranes Architectural Product Manual

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

Supplier contact details

Provide a material manufacturer/supplier warranty:

• Provide this warranty on the manufacturer/supplier standard form.
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for additional requirements.

Provide a material manufacturer/supplier warranty:

• Provide this warranty on the supplier standard form.
• Commence the warranty from the date of completion of the application.

Refer to the general section 1237 WARRANTIES for additional requirements.

Provide an installer/applicator warranty:

• Provide this warranty on the installer/applicator standard form.
• 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's warranty:

• Provide this warranty on the installer standard form.
• Commence the warranty from the date of completion of the application.
• Supply completed substrate readiness check sheets on completion
• Supply completed QC sheets on completion
• Provide a PS3 on completion to the main contractor

Refer to the general section 1237 WARRANTIES for additional requirements.

Tiling to be carried out by qualified, competent tilers experienced with the materials and installation requirements for tiling Gripset 2P liquid membrane and Schluter 25 systems.

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

The applicator must complete the substrate readiness check and quality control sheets 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.

Refer to the general section 1270 CONSTRUCTION for details of how samples will be reviewed and how instructions to proceed will be given.  Provide the following samples for review:

Check that the floor is rigid enough for the tiling.  Deflection of suspended floors should not exceed 1/360th of the span under dead load and live load.

Provide the following compliance documentation: -

• Manufacturer's, importer's or distributors warranty
• Installer's / applicator's warranty
• Producer Statement - Construction from the applicator / installer
• Other information required by the BCA in the Building Consent Approval documents.

Accept responsibility for the weather-tight 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 followed by a sprinkler test of the membrane and adjoining walls and window joinery.  Make good any lack of water tightness when the surface is completely dry.

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

Ensure that the applicator's Quality Control sheets are completed fully and faithfully for each installation area.

Wet area membranes under tiled areas to AS 3740, NZBC E2/AS1, NZBC E3/AS1 and to BRANZ Good Tiling Practice.

Walking surfaces comply with NZBC D1/AS1, Table 2 for slip resistance requirements and are exempt from testing.

The following walking surfaces have previously been tested for slip resistance, and comply with NZBC D1/AS1 requirements for testing.

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Test walking surfaces for slip resistance, refer to SELECTIONS for test condition.

Refer to SELECTIONS for options.

Waterproofing Systems WPS C- Screed, a polymer enhanced water resistant high bonding screed, providing controlled screed beds which do not require an additive.  Screeds formed from 80mm to 2mm.  Supplied in 20kg bags.

Gripset DM a premium grade mortar for a fine feather finish to zero which can be used with the WPS C- Screed to create a zero finish to outlets.  Gripset DM mixed with Gripset 11Y can be formed into a protection slurry priming for application over Gripset 2P® SBR waterproofing membrane systems.  Supplied in 20kg bags.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for floor levelling compounds.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for  fibre cement underlay sheets.

Gripset GP Primer , a water based fast drying single part primer and bonding agent for optimum adhesion to porous surfaces.  Coverage 6 to 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 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 parts A & B in 5 litre packs with a coverage of 3m² per litre.

Gripset 11Y, a specialized additive primer and bonding agent which is used for 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.  Complies with AS/NZS 4858, as a Class II membrane.

Supplied in 15 kg bags and 2P liquid in 10 litre pails.

WPS rubberized bond breaker jointing band, for 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®.

WPS rubberized bond breaker jointing band, for 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®.

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

WPS 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® membranes.  Supplied in 80mm wide x 10m long rolls.

WPS rubberized collar seal, 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® membrane.  Supplied in 3 sizes - small 120mm x 120mm, medium 250mm x 250mm and large 300mm x 300mm.

WPS 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.  Not for use in wet areas or external deck liquid SBR waterproofing.  Supplied in 100mm wide x 100m long rolls.

Schluter 25, a 3mm thick, high quality, (HDPE) fleece-backed, uncoupling mat specially designed for direct tiling over Gripset 2P® membrane systems.  Supplied in 1m wide x 30m rolls.

Schluter water based, PSA (pressure sensitive adhesive) to be used in conjuction with Schluter 25, uncoupling mat.  Supplied in 4 litre pails.

Schluter self stick joint band is a 0.6mm thick, black butyl joint finishing tape to be used in conjuction with Schluter 25, uncoupling mat.  Supplied in 80mm wide x 20m long rolls.

30mm wide x 2mm thick x 3.0m long aluminium termination bars with 8mm pre-punched diameter holes at 105mm centres providing good mechanical fixing options.

Construction Chemicals Monoflex ceramic tile single pack adhesive for tiling over Gripset 2P® membrane and Schluter 25, uncoupling mat.  Supplied in 20kg bags.

Construction Chemicals Epegrout epoxy tile grout systems for joints up to 10mm.  Available in supplier kits.

Cement based, compressible and to suit particular location/use.  To AS ISO 13007.3.

Waterproofing Systems MS40, high strength sealant used for termination flashings, expansion joints and adhesion of fixtures to Gripset 2P® membrane and also used in conjunction with Schluter 25, uncoupling mat.  Supplied in 600ml sausages.

Construction Chemicals, Sealflex multi purpose sealant.  Supplied in a range of colours.

To BRANZ Good practice guide: Tiling, section 5.0

• Neutral cured sealant for areas where waterproof membranes are used or where used against aluminium.
• Acid cured sealant except for areas where waterproof membranes are used or where used against aluminium.

Note:Check compatibility of membrane and sealant, use bond breaking tape to separate them if required.

Either, proprietary aluminium/brass with rubber or foam and compound infill, or rigid stabilised PVC sides with flexible central section.Refer to SELECTIONS for product selection

Refer to SELECTIONS for product selection.

Proprietary electric under tile heating system complete with thermostat/controller.  Refer to 7553 UNDERFLOOR HEATING MAT SYSTEM for under tile heating.

Allproof Vinylrite ring clamp droppers with a PVC base, brass screw fixed ring clamp and leaf guard fitting.  Supplied in 80mm, 100mm and 150mm diameter outlet sizes.

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

Type 316 Stainless steel or aluminium scupper outlets (E2 compliant) designed to be recessed into substrates flush with the substrate surface.  Available in 200mm wide x 75mm high with 400mm long outlet throat.

Type 316 Stainless steel or aluminium scupper overflows (E2 compliant) 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 integral overflow and designed to be recessed into concrete or plywood substrate surfaces flush. The sumps come with a riser fitting for the overflow outlet.  Outlet sizes are 80mm, 100mm and 150mm diameter.

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

Take delivery of pails of liquid membrane and accessories undamaged.  Include for site handling facilities where required.  Store in dry areas out of weather on a level surface, off concrete floors, out of direct sunlight or freezing conditions and with the required accessories under conditions that ensure no deterioration or damage.

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.

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

Prepare surface and complete tiling work in accordance with AS 3958.1, as modified by BRANZ Good practice guide: Tiling.

Ensure that all services and accessories are in place and located to suit the tile layout, and that the substrate, background and adjoining surfaces (with the preparation called for in this section) are of the quality necessary to allow tiling of the required standard, meets relevant standards and the specified product manufacturer's instructions.

Inspect background and substrate materials for any conditions unsuitable for tiling over.Substrate material must be even and true with a maximum variation in plane of no greater than ±4mm in every 2m, in accordance with AS 3958.1, section 4.

Do not commence work until the affected area is rectified.  Commencement of installation constitutes acceptance of site conditions.

Ensure the floor is dry and if in doubt check for moisture content by hygrometer.  Do not proceed with the installation of screeding, waterproofing and tiling work until readings for the whole area show 75% relative humidity or less.

Do not carry out tiling where the substrate temperature is below 5ºC or above 40ºC.

Check tiles to ensure that they are as specified, from the same batch, of a consistent colour and pattern and sufficient to complete the work.  Reject tiles that vary widely in colour or pattern.  Reject tiles that are damaged.

Before commencing work confirm the proposed layout of tiles and expansion joints and other visual considerations of the finished work.

Before commencing the setting out confirm the number and location of cut tiles.  Minimise in number with no cut tiles less than half size and only at the perimeter of the work.

Do not start laying tiles until concrete floors are cured, moisture content of floors is such that shrinkage is complete, thermal movement has been accommodated and the levels and surface finish will allow for tile laying of the required standard.

Prepare backgrounds as described in AS 3958.1, Section 4. Suitably prepare backgrounds and substrates in accordance with the manufacturer's instructions to receive the bedded finish. Remove all dirt, dust, grease, oil, loose particles and any other form of contamination or deleterious material. Ensure that substrates are sound and dry.

Installation to be in accordance with AS 3958.1, Section 5, including setting out, fitting, movement joints, sealants, tile finish and joints, and grouting.

Prepare backgrounds in accordance with AS 3958.1, section 4 and in accordance with Gripset and other selected tiling installation products manufacturer's instructions for the selected substrate.

Ensure that the substrate is in a suitable condition to allow work of the required standard and will comply with the requirements of the NZBC E2/AS1 for the relevant substrate and Waterproofing Systems NZ Ltd 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 grid 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 there are no concrete additions or release agents that could affect the adhesion of membrane.

Vacuum when preparation is complete to remove all dust.

Ensure contaminated substrates are prepared in accordance with the manufacturer's instructions of the tiling installation products.  Completely remove existing surface contaminates or surface finishes oil that may affect bonding or adhesion.  Surface to finish clean and dry with a texture giving a complete key.

Generally concrete surfaces are prepared via mechanical abrasion such as scabbling, grinding or shot blasting to a clean, sound surface.  The surface requires preparation so as 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.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for  fibre cement underlay sheets.

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 old existing or remediation use Gripset 11Y slurry primer.
• for damp substrates use Gripset E60
• for metal and smooth surfaces use Gripset OP primer.

Refer to 6192 FLOORING SUBSTRATE PREPARATION  for the installation of levelling compounds.

Install selected Waterproofing Systems WPS C- Screed &/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, clause 6.5 Falls in floors.

Areas to be waterproofed shall be in accordance with NZBC E3/AS1, AS 3740 and BRANZ Good Practice Guide -Tiling Section 7 and Waterproofing Systems NZ Ltd recommendations.  Waterproofing interior wet areas, as shown on the drawings or stated in 4. SELECTIONS.

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

Apply Gripset 2P® liquid membrane only in fair weather with surface temperatures above 5°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 recessed into the substrate just under flush with the substrate surface.  Prime with Gripset OP primer before the Gripset 2P® application commences.

Mix Gripset 2P® in accordance with manufacturer's instructions.  Gripset 2P® dry powder is slowly poured into the liquid mixing the 2P® powder together with the liquid using a slow speed electric stirrer to mix thoroughly ensuring the solids content is evenly dispersed through the liquid.

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

Apply the first coat of Gripset 2P® using a 13 nap roller fleece ensuring a wet film coverage of 1.0mm including the over coating of the installed Elastoproof detail accessories.  Apply a second coat in the opposite direction a minimum of 4 hours after the first coating ensuring a wet film coverage of 1.0mm and leave to dry and cure.

Where Schluter 25, tileJAK® timber raft system or tileJAK® pedestal system is to be installed over the Gripset 2P® system, apply 2 coats of the Gripset 11Y slurry system in accordance with manufacturer's installation instructions, as protection against scuffing and mechanical damage.

Where Gripset 2P® is not covered with trafficable finishes, prime the Gripset 2P® with GP primer and apply 2 coats of WPS acrylic high build coating as the UV and protection coating.  Where Gripset 2P® will be directly trafficked on fully sand blind the WPS acrylic HiBuild for hard wearing protection.

Gripset 2P® must always be left to cure for 14 days then over coat with Gripset 2P®, 2mm dry film thickness as membrane protection.

Use Waterproofing Systems MS40 sealant adhesive with Gripset 2P® 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® membrane is dried and fully cured.  Drying time in ambient conditions is a minimum of 24 hours, in cold damp conditions allow a longer drying time.

Ensure Gripset 2P® membrane is clean and free from dust, dirt and any other contaminants.  Clean areas where WPS MS40 sealant have been applied.

Apply Schluter 25 uncoupling membrane in accordance with manufacturer's instructions.  Pre-cut Schluter 25 uncoupling membrane prior to applying Schluter PSA adhesive at a rate of 8m² per litre and allow to tack off forming a white to clear colour.

Lay uncoupling membrane sheets leaving 6mm clearance from all abutments and with all sheet edges tightly butted.  Apply hand pressure using a wooden float or steel trowel.

Seal perimeter edges with WPS MS sealant and apply Schluter self-stick flashing tape.  Ensure tape extends 10mm onto waterproof membrane upstand and balance over uncoupling mat.  Pressure roll into place.

Using a flat steel trowel ensure uncoupling mat notched recesses are fulled with selected tile adhesive.  Fully back butter tiles and install tiles.  Ensure tile adhesive is cleaned from 6mm perimeter abutment joint.  Apply Construction Chemicals Sealflex sealant over a backer rod into the 6mm perimeter gap at the junction of the floor tile and the wall upstand.

Install movement joints to go right through the tile and bed to the background, maintaining any waterproofing.  Ensure any slip layer backing (bond breaker) required, is installed.  Joint width minimums:

• 4-6mm interior tiles on concrete (with low moisture content)
• 6-8mm interior tiles on dry timber structure
• 8-10mm exterior tiles on concrete (with low moisture content)
• 10-12mm exterior tiles on dry timber structure
• To match grout width, if equal/larger than above
• Larger to suit joint infill requirements (preformed jointers)

In wall tiling provide joints at; internal vertical corners, as well as joints at, floors, columns/beams, nibs, hobs and similar. Provide joints around sanitary fixtures, around fixtures interrupting the tile surface, at junctions with joinery fixtures, including window and door frames and built in cupboards, and at changes in substrate or background.  In large area wall tiling provide vertical joints at not more than 3.6 metres spacing along the length of a wall and horizontal joints at each storey rise in the height of a wall, and over all existing substrate expansion joints.

In large areas of floor tiling provide joints at not more than 4 metres spacing in both directions and 3.6 metres externally.  Provide expansion joints, at the perimeter of tile floors, at changes of level or slope, around structural features, changes in substrate, around sanitary fixtures and other fixtures interrupting the tile surface, and over all existing substrate expansion joints.

Metal or plastic joints, refer to SELECTIONS.

Accurately locate as detailed and fix joints insitu, with the bedding, or on top of the bedding, to finish flush with the installed tile and to the tile manufacturer's requirements.  Fit and fix rubber/rubber compound inserts to finish flush.

Carefully clean out the joint, insert the backing rod if required and fill with compound/sealant placed by gun.  After the correct interval, finish the surface off smooth, and flush on flat areas or concave in corners, to the compound/sealant manufacturer's requirements.

Setting out, cutting and fitting of tiles to be as described in AS 3958.1.  Set out tiling as shown on the drawings.  Confirm bond and pattern before installing.

Ensure cut edges are smooth and installed without jagged or flaked edges.  Always use whole tiles or if tiles have to be cut the largest portion of a cut tile possible.  Maintain the heights of wall tile work in full courses to the nearest dimension.  Within allowed tolerances, ensure corners of tiles are flush and level with corners of adjacent tiles.  Keep joint lines, including mitres, straight and of an even width.  Fully bed trim units, moulded or shaped pieces and other accessories with an appropriate bedding material.  Fix accessories level, plumb and true to the designated projection at detailed locations and heights.

Ensure finished surfaces are flat and true to a tolerance of ±4mm in 2 metres from the required plane.  Clean surplus bedding material from joint spaces and tile surface.  Ensure joint widths are consistent throughout the installation, measured at the tile face.  Ensure joint alignment is consistent throughout the installation and to a tolerance of ±4mm in 2 metres from the detailed joint alignment.

Apply Construction Chemicals Monoflex tile adhesive to walls and floors in accordance with manufacturer's product data sheets and specifications.

Apply and float thick or thin bed of modified cement based adhesive to bed thickness to the adhesive manufacturer's requirements.  Ensure that the whole of the back of the tile is in good contact with the adhesive with no voids.  Remove a tile periodically during installation to ensure correct coverage.  Do not fix tiles over skinned adhesive.  If required, mix adhesive to manufacturer's instructions.

Notched trowel method

• Adhesive application to be as described in AS 3958.1, clause 5.6.2(a).  Notched trowel sizes shall be 4.5mm x 4.5mm x 4.5mm (mosaics) 6mm x 6mm x 6mm, 10mm x 10mm x 10mm, 12mm x 12mm x 12mm.  Use an appropriately notched trowel to achieve full coverage.

Buttering method

• Adhesive application to be as described in AS 3958.1, Clause 5.6.2(c).

Tiles in awkward locations

• The buttering method may be required, or fixing might be necessary to achieve full bedding, even though the notched trowel method is used generally.

Accurately locate and fully bed edge trim units, dividing strips, moulded or shaped pieces and other accessories with an appropriate bedding material.  Fix accessories level, plumb and true to the designated projection at detailed locations and heights.

Remove spacers.  Prepare joints, mix and apply grout and finish off to the grout manufacturer's requirements, to finish the grout uniform in colour, smooth and without voids, pinholes or low spots.

Ensure Construction Chemicals Epegrout in conjunction with Gripset 2p waterproof membrane or Schluter 25 uncoupling membrane.

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

Refer to 4831WS WPS TILEJAK® RAFT SYSTEMS for installation requirements.

Refer to 4831WS WPS TILEJAK® RAFT SYSTEMS for installation requirements.

Upon completion of setting and grouting, thoroughly sponge and wash the tiles to leave them completely clean and without blemish.  Use a proprietary cleaner to clean tiles of cementitious residue as necessary and to remove residues of epoxy grout from tile surfaces.  Finally polish glazed tiles with a clean dry cloth.

Carry out routine trade cleaning of this part of the work including periodic removal all debris, unused materials and elements from the site.

• Arrange for an inspection of the completed waterproof membrane work.
• Supply completed substrate readiness check sheets with the warranty application.
• Supply completed QC sheets with the warranty application.
• Protect the membrane until completion of the contract works.

Repair damaged or marked elements.  Replace damaged or marked elements where repair is not possible or will not be acceptable.  Leave work to the standard required for following procedures.

Provide protection boards to protect the completed membrane system until following trades have completed their works.

Dam up at the water outlets and flood test to a depth of 40mm for 8 hours, followed by a sprinkler test testing the wall upstand waterproofing and membrane system to ensure membrane is watertight, make good any issues and document on the QC sheets and re-test again.

Test walking surface for slip resistance to comply with NZBC D1/AS1, 2.1 Slip resistance.  Refer to 1278SR SCHEDULE OF SLIP RESISTANCE TESTING for test method, minimum test value required and general reporting requirements.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for floor levelling compounds.

Refer to 6192 FLOORING SUBSTRATE PREPARATION for  fibre cement underlay sheets.

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

Refer to the general section 1270 CONSTRUCTION for details of how spares and maintenance products will be handled.  Provide the following spares and maintenance products: