Standard specification for Texmastic AQUASEL self-adhering sheet membrane and Texadrain protection/drainage

Page 1 of 4 Standard Specification: P5500 Dated: October 2005

This section deals with the supply and fixing of Aquasel Membranes for moisture exclusion to backfill wall systems.

1.0 GENERAL

1.1 NZ BUILDING CODE:

Refer to the NZ Building Code and Approved Documents for the criteria and/or methods that must be used in this section to establish compliance with the Code.

E2 External Moisture E3 Internal Moisture B2 Durability F2 Hazardous Building Materials

1.2 DOCUMENTS:

Which relate to this section are:

NZBC Acceptable Solution E2.AS1 Clause 12.0 Equus Industries/Texmastic Inc. Aquasel data sheets and technical information.

Documents listed above and cited in the following clauses are part of this specification and are the latest edition, including amendments, at the time of tender. However this specification takes precedence when it is of a higher standard than the cited document.

2.0 MATERIALS

2.1 Flexible Sheet

.1 Self adhering sheet membrane vapour barrier: High Strength Polyethylene/rubberized asphalt composite membrane.

Manufacturer: Texmastic International Inc Dallas Tx (Equus Industries). Brand: Aquasel 2001 AD (1.5mm). Page 2 of 4 P5500

2.2 Auxiliaries

.1 Primer to EPS Block:

Manufacturer: Equus Industries Ltd. Brand: Aquasel EPS Primer

or

.2 Primer to Concrete:

Manufacturer: Texmastic International Inc. Brand: Aquasel P Primer

.3 Sealant:

Manufacturer: Tremco Pty Ltd Brand: Polyroof

.4 Drainage Protection:

Manufacturer: Texmastic International Inc. Brand: Tex-Drain 4000

3.0 WORKMANSHIP:

3.1 General:

.1 Storage:

All materials should be protected from rain and physical damage. Store all materials away from sparks or flames. Store membrane where temperature will not exceed 35 degrees for extended periods. Outdoors, place Aquasel cartons on raised pallets and cover completely.

.2 Safety Handling Information:

Aquasel products and auxiliaries must be handled properly.

.3 Compatibility:

Aquasel is incompatible with tars, pitches and sealants containing tar or polysulfide polymer and is sensitive to some organic solvents. Always avoid direct contact of the adhesive layer with these materials. When in doubt consult Equus for recommendations on specific applications.

3.2 INSTALLATION:

.1 General:

Fix the Aquasel Vapour barrier as recommended by the manufacturer, continuous over all areas as detailed on site drawings. Care must be taken that no holes are formed in the membrane, particularly at wall/floor junctions and around penetrations and openings. Page 3 of 4 P5500

.2 Temperature:

Apply Aquasel Membranes only in fair weather when air and surface temperatures are between 4°C and 30°C. Do not apply Aquasel Primer and Membranes to frozen

concrete, or to wet surfaces.

.3 Priming:

Concrete:

All concrete surfaces shall be primed at the rate of 5 – 6 m2/litre by brush, lambswool roller or spray with Aquaseal P Primer. Allow primer to dry one hour or until solvent has evaporated. Prime only the area which will be covered with the membrane in a working day. Areas not covered within 24 hours shall be reprimed. Dense surfaces such as PVC shall not be primed but must be clean and dry. Masonry surfaces and other absorbent substrates may require special priming procedures and reference should be made to Equus Industries for specific details.

Polystyrene:

XPS or EPS surfaces must be primed with Aquasel EPS Primer, applied at 7sqm/litre, and allowed to dry till transparent and tacky.

.4 Corner Details:

All inside and outside corners should be double covered by using a strip 250mm minimum width centered along the axis of the corner. This strip should be completely covered by the regular application of Aquasel Membrane.

.5 Application of Horizontal Surfaces:

Apply Aquasel Membrane from the low point to the high point across the fall line so that laps shed water. All edge and end seams must be overlapped at least 65mm. Stagger end laps. On polystyrene surfaces broom the membrane down tightly and tightly roll all joints. Apply Aquasel Membrane double thickness over properly sealed expansion, construction and control joints. Patch misaligned or inadequately lapped seams with Aquasel Membrane. Slit any fishmouths, overlap the flaps, and repair with a patch, and press or roll in place. The edge of the patch shall be sealed with Polyroof tooled off with Aquasel.

.6 Drains and Protrusions:

Apply a double layer of Aquasel Membrane around posts or projections at least 150mm in all directions.

.7 Vertical Surfaces:

Apply Aquasel Membrane vertically in strips of 2.50 metres in length or less. Edge seams must be overlapped at least 65mm. Press all membrane on vertical surfaces with heavy hand pressure during application, broom tight or roll with a wall or counter top roller. Ensure that all overlaps in the horizontal plane are made working from the base of the wall or pit upwards, so that laps are made with the raw edge down. Page 4 of 4 P5500

.8 Inspection and Repair:

Inspect membrane thoroughly before covering and make any corrections immediately.

.9 Protection of the Membrane:

Install Texadrain 4000 to the wall areas to be backfilled, in accordance to manufacturer’s instructions. All joints must be interlocked and where necessary sealed with tape.

To avoid damage from other trades, construction materials or backfill, exposed membrane should be covered within 5 days after application.

3.3 Completion

.1 Inspection of the Membrane:

Ensure that a homogenous sheet vapour barrier is achieved and remains as such through the ensuing work. Care must be taken not to puncture or tear the membrane prior to covering. Where necessary protective board, or topping should be placed immediately to protect the Aquasel Membrane. Aquasel Membrane will self-seal small holes, but not large holes or tears. Careful inspection must always be made prior to covering membrane and any holes or tears must be patched with Aquasel Membrane and Polyroof. Misaligned or wrinkled seams should also be patched with Membrane.

.2 Clean Up:

Collect all trade rubbish and deposit where directed on the site. Take all unused material away from the site.

4.0 WARRANTY:

The Aquasel 1.5MM waterproofing membrane as detailed in this specification may be warranted as to waterproof integrity and to be waterproof for a period of up to fifteen (15) years from backfill application:

Such a warranty is issued on condition that:

1. All work is carried out by an approved Equus Applicator.

2. All work is carried out in accordance with this specification, or any amendments or additions thereto made by the Manufacturer or his representative.

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