Membrane Tanking System

BITUTHENE 3000 SELF-ADHESIVE

MEMBRANE TANKING SYSTEM

This is a generic specification. The sections must be customised to suit the project being specified, by removing irrelevant information and adding project-specific information and selections.

Masterspec sections must be customised to suit the project being specified, by removing irrelevant information and adding project-specific information and selections.

1.GENERAL

This section relates to the application of tankingsystems for basement and retaining wall damp-proofing.

-BITUTHENE 3000

This system is designed for waterproofing the lower storey of a building which is wholly or partly below ground where there is no risk of hydrostatic water pressure.

If hydrostatic pressure is possible a combined BITUTHENE 3000 and PREPRUFE system should be installed to encapsulate the wall and floor of the building.

Buildings with deep multi-storey basements present specialist design and installation problems which are not covered by this generic specification.

Modify or extend the above description to suit the project being specified.

Proper preparation, application, protection, back filling and drainage for tanking and damp-proofing are critical to ensure performance. Liaise with the NURALITE Waterproofing LIMITED before modifying this section to suit.

1.1DOCUMENTS REFERRED TO

Documents referred to in this section are:

NZBC E2/AS1External moisture

Documents listed above and cited in the clauses that follow are part of this specification. However, this specification takes precedence in the event of it being at variance with the cited document.

Delete from the DOCUMENTS clause any document not cited. List any additional cited documents.

1.2SUPPLIER'S DOCUMENTS

Supplier's documents from NURALITE Waterproofing Limited relating to work in this section are:

BITUTHENE 3000 BBA Agreement Certificate 97/3325

NURALITE Producer Statements

NURAPLY System design and specification manual

NURALITE Waterproofing Limited: CAD Tanking drawings

Copies of the above literature are available from NURALITE Waterproofing Limited

Web:

Telephone:0-9-579 2046 Auckland

0800 Nuralite (0800 687 254)

Facsimile:0-9-579 5136 Auckland

It is important to ensure that all personnel on site have access to accurate, up to date technical information on the many products, materials and all equipment used on a project. In most cases individual products are not used in isolation, but form part of a building process. Also a particular manufacturer's and/or supplier's requirements for handling, storage, preparation, installation, finishing and protection of their product can vary from what might be considered the norm. Access to technical information can help overcome this potential problem.

Warranties

1.3WARRANTY - INSTALLERS

BITUTHENE 3000 applicator to warrant this work under normal environmental and use conditions against failure of materials, waterproofing and execution.

5 years:Execution warranty

From:Date of completion of application

Provide this warranty on the installer's standard form.

Refer to the chosen conditions of contract as it may also contain information on warranties/guarantees.

1.4WARRANTY - MANUFACTURERS

NURALITE applicator to provide warranty for the system under normal environmental and use conditions against failure.

20 years:Warranty

From:Date of completion of application

Provide this warranty on the NURALITE Waterproofing Limited Materials Performance Warranty form.

The standard NURALITE materials and associated applicator warranty system has operated effectively for forty years in New Zealand and has always been freely offered to specifiers

Requirements

1.5NO SUBSTITUTIONS

Substitutions are not permitted to any specified system, or associated components and products.

1.6QUALIFICATIONS

Tanking to be carried out by competent workers licensed by NURALITE Waterproofing Limited and experienced with NURALITE materials system and specialist techniques. Provide on request evidence of experience prior to commencing work.

A complete list of approved applicators is available on the Nuralite website () or by contacting Nuralite on the above phone numbers.

2.PRODUCTS

Select NURAPLY 3PT, NURAPLY 3PTM or NURASEAL for this work and then use the PRODUCTS and EXECUTION clauses required for the system. Consult NURALITE Waterproofing LIMITED for particular requirements.

2.1BITUTHENE 3000 WATERPROOFING MEMBRANE, SELF ADHESIVE

BITUTHENE 3000 A flexible cold applied waterproof membrane combining a special high performance cross-laminated, high tear strength HDPE carrier film with a self-adhesive rubber bitumen compound. The membrane can accommodate minor settlement and shrinkage movement and is chemically resistant to provide external protection against aggressive soils and ground water. BITUTHENE 3000 is printed with the Bituthene name and batch to aid identification and an overlap line at each edge to ensure minimum overlaps and correct alignment. Thickness not less than 1.5mm.

2.2PRIMER

BITUTHENEB1 surface primer for the tanking system, to prepare the substrate for optimum adhesion.

2.3TOP EDGE ANCHOR STRIP

Aluminium or steel anchor strip.

Select from one of the two following alternate protection sheet clauses.

2.4BITUTHENE CORFLUTE PROTECTION SHEET

Rot-proof board for use as a protective barrier against mechanical damage..

2.5BITUTHENE LM. Two component elastomeric, cold applied liquid compound, which cures to form a tough seamless rubber-like waterproof layer. BITUTHENE LM shall conform to irregular profiles and be suitable for detailing curved, irregular or stepped profiles, pile penetrations, internal corners, flashing round drains, gullies, pipe entries and edge sealing at terminations.

2.6ADCOR 500S Waterstop

A thick sectioned, conformable, hydro-expansive waterstop for preventing water entry through joints in concrete sub-structures.

2.7SHARKSEAL

SHARKSEALBitumous Joint Sealant is a one component sealant based on

bitumen and rubber.

3.EXECUTION

Conditions

3.1COMPLY

Comply with the NURALITE Waterproofing LIMITED requirements and instructions.

3.2STORE

Store NURALITE waterproofing systems rolls and accessory materials under conditions that ensure no deterioration or damage. Store in shade or cover in hot sun. Protect liquid components from freezing.

3.3WEATHER CONDITIONS

Apply NURALITE waterproofing systems tanking systems only in fair weather with air temperature above 5°C. Apply adhesives and make site joints only in weather conditions compatible with perfect jointing.

3.4DE-WATERING

Maintain water level at not less than 300mm below the level of the base concrete during the progress of the tanking work and until protective loading coats and walls are complete and fully set.

Use this clause if there is water present. Modify to suit the circumstances.

3.5DRAINAGE

Install approved drainage system to remove water from foundations. Ensure drain is protected with geotextile cloth to prevent it clogging with fines, and that it is correctly located, 150mm from the membrane and below the footing.

The drainage system should be designed to cope effectively with the anticipated volumes of water on the site.

3.5CHECK SUBSTRATE

Check that the substrate will allow work of the required standard with adequate safe working space for applicators. Complete any remedial work identified and allow to cure before commencing tanking application.

Ensure that the substrates for NURAPLY 3PT and NURASEAL tanking are correctly specified in the appropriate section. Minimum requirements are:

Surface finish:Clean level and dry, free of holes or lumps

Concrete blocks joints to be tool compacted then flush pointed

Concrete minimum 28 days cured

Sharp edges ground off

Upstands to have 50mm corner fillets

3.6CURING OF NEW CONCRETE

Allow concrete and masonry to dry to the NURALITE Waterproofing LIMITED requirements before applying tanking. Minimum curing of new concrete: 28 days. This is not applicable for blockwork or site lean concrete.

Application - Preparation

3.7ENSURE SUBSTRATE

Ensure all surfaces are clean and free from voids, spalled areas, loose particles, and sharp protrusions. Ensure no projections of sharp materials exist that will cause damage to tanking. Check that masonry joints are struck off flush.

Ensure form oils or release agents and curing compounds are completely removed.

3.8PREPARE SUBSTRATE

Remove projections, wire-brush and remove all debris, leaving the surface dust-free, oil-free and clean, with nothing that could diminish the adhesion of primers. Fill tie holes flush and smooth with NURAFLUSH. Grind off steps or sharp protrusions caused by formwork joints.

3.9TURN UPS

Where tanking is turned up against hardened concrete, ensure the surface is smooth and free of all sharp projections. Fill internal corners with a fillet ofProfili bitumen triangular fillets.

3.10TURN DOWNS

Where BITUTHENE 3000 is turned over an external corner, first grind the corner to produce a smooth 25mm radius or chamfer.

[IS THIS REALISTIC?]

3.11CLEAN SURFACES

Clean surfaces with a broom or oil free compressed air to remove dust, loose particles and material that could affect bonding.

3.12DRESS OFF HARDFILL SURFACE

Dress off surface of hardfill with a 15mm layer of fine, clean sand rolled to a smooth surface. Ensure concrete surface is a smooth steel trowel U3 surface to NZS3114. Grind off any steps or sharp protrusions.

3.13REMOVE BACK FORMS

Remove back forms to ensure no vapour pressure develops beneath the membrane.

3.14PRIMING

Ensure concrete or masonry substrates are sufficiently cured and dry to permit the intended performance of the BITUTHENE B1 primer. Apply BITUTHENE B1 primer at the coverage rate recommended by NURALITE Waterproofing LIMITED.

3.15ALLOW PRIMER TO DRY

Allow the primer to dry. Do not prime more than can be covered in one working day. Prevent contamination of the primed surface prior to application of the tanking system.

Application - walls

3.16BITUTHENE 3000 REINFORCEMENT

Reinforce all angles with a strip of the specified damp proofing material, not less than 300mm wide, applied before the main sheeting.

3.16BITUTHENE 3000 APPLICATION METHOD

Apply the NURALITE waterproofing system with laps and joints and reinforcing pieces at junctions to provide a waterproof finish to NZBCE2/AS1, 12.0 Basements. Continue main sheeting around angles, extending not less than 150mm on to adjacent surfaces.

3.19CONSOLIDATE BITUTHENE 3000 JOINTS

Pressure join laps in BITUTHENE 3000 rolls and roll to consolidate, minimum side lap 75mm, minimum end lap 100mm.

3.20BITUTHENE 3000 FLOOR TO WALL JUNCTION

Protrude the specified under slab vapour barrier 150mm beyond the perimeter of the footing. When BITUTHENE 3000 is applied to base of wall, bring this portion of vapour barrier up the wall. Overflash with a second strip of 150mm BITUTHENE 3000.

3.20PROTRUSIONS

Install a ADCOR waterstop in protrusion hole. Dress all protrusions with additional layer of BITUTHENE 3000 seal closed with a jubilee clip. Apply BITUTHENE LM as necessary.

3.20SEALING EDGES WITH SHARKSEAL MASTIC AND ANCHOR STRIPS

At edges of the membrane, adhere firmly on to the substrate and seal with SHARK SEAL Mastic. Install an anchor strip on all top edges of tanking.

3.21ADDITIONAL THICKNESS

Ensure a double layer of tanking around pipes and penetrations and at all junctions and changes of direction. Seal edges to NURALITE Waterproofing LIMITED requirements.

3.22SECTIONAL COMPLETION

As sections of tanking are completed, arrange for inspection of the work before covering with protective sheets, walls, or slabs.

Application - protection

3.23PROTECT VERTICAL SURFACES

Protect vertical surfaces from damage before covering with protective sheets to NZBCE2/AS1, 12.0 Basements.

3.24PROTECT HORIZONTAL SURFACES

Protect the horizontal tanking from damage during laying by ensuring applicators wear soft soled shoes. Except for inspection purposes do not allow traffic on the tanking after installation and before protection sheets have been laid.

Select from one of the following alternate protection/drainage sheet clauses.A drainage system is required in addition to the Goldfoam insulation sheets.

3.26INSTALL BITUTHENE PROTECTION SHEETS

Neatly scribe and fit sheets, spot fixing them with Tixoplast adhesive, to NURALITE requirements for this work, to fully protect the whole of the tanking as backfill is placed to NZBCE2/AS1, 12.0 Basements.

3.27SUPERVISION OF BACKFILLING

Supervise backfilling operations to ensure no damage is caused to the waterproofing system.

3.28COVER HORIZONTAL SURFACES

After laying is complete cover the tanking on horizontal surfaces with a polythene or similar isolating slip membrane and a layer of concrete. Place by pumping or similar to limit the possibility of damage due to construction plant.

The tanking might be covered directly by a stronger wearing slab. Modify accordingly. Include heavy grade polythene slip sheet where required.

Completion

3.29CLEAN UP

Clean up as the work proceeds.

3.30LEAVE

Leave this work in a sound, coherent, voidless and impermeable smooth condition, completely waterproof, free of any defect and with protection sheets firmly in place.

3.31REMOVE

Remove debris, unused materials and elements from the site.

4.SELECTIONS

4.1PRESSURE RATING

Designated water pressure head: ~ metres

Underground walls

4.1SINGLE LAYER BITUTHENE 3000 TANKING SYSTEM

Location:~

Supplier:NURALITE Waterproofing LIMITED

Brand:BITUTHENE 3000

Accessories

4.2BITUTHENE PROTECTION SHEET

Thickness:~mm

Roof Readiness Checklist on Concrete Substrate

Project Name:______

Form Completed by:______

Company:______

Area ready:______

Applicator ______

Concrete cured and thoroughly dry over a minimum of 28 days.

Surface smooth and clean with correct drainage falls.

Cavities and cracks filled with repair mortar, flushed off and cured.

Concrete surface firm with any soft concrete or laitance removed.

Roof drains and overflow recesses formed to fit rebated outlets.

Mortar or Profili bitumen fillets to all upstands and smooth 5mm radius

to all external edges

If terminating into a chase, pre-form the chase and ensure it’s

straight and 20mm deep.

Plinths formed for any exterior ventilation, fixtures or similar.

Substrate clean, firm and suitable condition for laying the Nuralite system.

Notes

Signed:Date:

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