04-Waterproofing And Tiling On Pools

SURFACE PREPARATION

Design and construction of the pool should comply with the intended use as it is

essential for eliminating potential problems that may arise during application. Dimensions, depth, and overflow system should be designed upon the intended use and format of the pool, and static calculations as well as mechanical installation plans should be performed accordingly.

If it is intended to use a top-overflow system, a balancing tank should be constructed with a volume equal to 1/10 of the area of pool where overflowing water is retained before entering the filter.

If it is intended to use a top-overflow system, there should be a slope of 5% between edge of pool and overflowing channel. It is required to locate handholds as well as other non-slip elements of pool in accordance with the slope in order to ensure that pool water overflows equally at each side of the pool.

Do not tile onto new screed or concrete. Leave fresh casted concrete pool shell to complete its curing for at least 6 weeks before tiling. Duration may extend in lower temperatures and/or high humidity conditions. The shell should be wetted each day during curing to prevent formation of cracks caused by shrinkage, in dry and hot ambient conditions.

The substrate must be clean in order to ensure the adhesive bonds properly. Surfaces should be clean and free from dust, dirt, grease or any other contaminating barrier. Subsequently hardened or polished surfaces and laitance (concrete and etc.) must be removed by scabbling. Ensure that substrate is mature, sound, stable and smooth, and not too dry or wet. It is recommended to clean up the surface with pressurized water

The deepest point of the application surface in 2 m long gauge should not exceed 5 mm. For larger deviations, the surface should be smoothened with plastering and flooring products.

SELECTION OF TILES

Pool tiles of any format and size as recommended by the manufacturers.

CERMIX PRODUCTS MIX

CERMIMORTAR 2-10
CERMIFILM
CERMIPOOL
CERMILATEX
CERMIPROOF FF
CERMIJOINT EPOSOL
CERMIJOINT 2-10 HRC
CERMISIL NS
CERMINET 

APPLICATION TECHNIQUE

All hydraulic connections, discharge pipes, lighting armatures, drains and faucets should have been placed during the construction of the shell. The pannel wall formwork of the shell should be succeeded with minimized imperfections in the concrete finish.

Before commencing tiling application, pool shell should be filled up with water and waited for 7-10 days to check for any leakages. Any water leakage should be repaired with suitable products. Then, waterproofing application should be completed prior to fixing tiles.

For repairing and plastering works on shell surfaces, 25 kg of CERMIMORTAR 2-10 is mixed with 2,0 lt of CERMILATEX and 4,0 lt of clean water to a smooth and homogenous paste. It is recommended to use a low cycled electrical drill-mixer for mixing. The paste should rest for 5 minutes prior to application and should be applied after remixing.

CERMIMORTAR 2-10 should be applied with a maximum thickness of 7 mm. Apply the plaster following the instructions on product packaging and technical data sheets. In case of complete plastering of the surface, wait for at least 6 weeks for the plaster to complete its final setting.

Waterproofing application should be held on all surfaces of shell with CERMIPROOF FF, cement based, two component, and full elastic waterproofing material.

High porosity substrates should be primed with CERMIFILM before applying CERMIPROOF FF. Priming will balance the water absorptivity of the surface and enhance bonding adherence. Wait for at least 3 hours for the primer to dry and then continue to waterproofing application.

Mix two components of CERMIPROOF FF to a smooth and homogenous paste. It is recommended to use a low cycled electrical drill-mixer for mixing. The paste should rest for 3 minutes prior to application and should be applied after remixing.

CERMIPROOF FF is applied over the surface using a stiff brush or a paint roller at a minimum rate of 1,5 kg/m2 (corresponding a coat thickness of 1 mm). It should be applied over the surface spreading out evenly and ensuring full overlap between each brush or roller application.

2 coats of application are recommended, ensuring a total thickness of 2-3 mm at minimum. The second coat should be applied as soon as the first coat has dried

(reached initial set of 6 hours). Apply the second coat in right angles to the first coat application direction to ensure a pinhole free application (in practical, application is recommended in such that first coat in horizontal and second coat in vertical directions).

Reinforcement with flexible tape or alkali resistant reinforcement mesh should be performed in order to prevent any water leakages at cold joints (internal corners).

Reinforcement is embedded in the first coat of waterproofing, when the coat is still wet, as recommended by the reinforcement manufacturer. Upon drying of the reinforced first coat, second coat should be applied as described above. Insulation details of structures on the covering (such as lighting armatures, discharge pipes, drains and faucets) should be figured out with appropriate waterproofing solutions.

Application on hot surfaces and during sunny weather is not recommended. Cracks may happen due to sudden shrinkage.

Following application must be done at least 48 hours later after waterproofing material has set.

For fixing tiles select CERMIPOOL.

Gradually add clean water to powder (in quantities as stated in technical legends of products), and mix to a smooth and homogenous paste. It is recommended to use a low cycled electrical drill-mixer for mixing. The paste should be in a consistence such that it does not flow when handled with a trowel. The paste should rest for 5 minutes prior to application and should be applied after remixing.

Fixing with CERMIPOOL; apply the adhesive on the substrate (for tile sizes >33x33 cm, adhesive should be buttered onto the tile back as well) with a suitable notched trowel to achieve the required bed thickness. Glass tiles, natural stones and marbles should be fixed with double buttering method. The tiles must be fixed within the open time of adhesive and pressed on with a twisting and sliding action to achieve a good contact. The tile should be gently hammered with a rubber hammer in order to provide the stability of bonding and the adhesive to spread and fully cover the tile back.

Lift an occasional tile after fixing to verify that the required contact is being achieved.

Excess adhesive must be cleaned off from the tiles and joints with a damp cloth or sponge before it hardens.

Grouting should start after the adhesive has set and dried.

For grouting application select one of CERMIJOINT EPOSOL or CERMIJOINT 2-10 HRC according to technical requirements. These products provide improved water repellency features and resistance to chemicals that the water may contain for hygienic care.

While applying the grout, carefully follow the rules and instructions on product packaging and technical legends of the products. For a easier application and to ensure full final product performance, the grout should be applied at an ambient temperature range of +10 °C - +25 °C.

For cementitous grouts; do not add more water into the mixture or re-wet once the mixture is prepared. This will cause the set grout to be weak. It may also cause discrete holes and grains on grout surface, and surface discolouration and variation which will be more noticable with darker grouting colours.

For a easier application and to ensure full final product performance, the grout

should be applied at an ambient temperature range of +10 °C - +25 °C.

Grouted surfaces must be protected for at least 24 hours from direct sunlight, frost and rain.

If any stains and residues remain after grouting, wait for 10 days and treat the tile

with CERMINET tile cleaning material to loosen and remove these residues.

Expansion joints should be incorporated to allow for slight movements due to

changes in temperature, humidity and thermal and mechanical loads formed on the surface and substrate. Expansion joints should be provided along all internal corners, existing movement joints or changes in background material. As described above expansion joints absorbs the stresses formed between different movement capacities of overlapping materials. Thus, it prevents the deformations that may arise in the substrate and covering. Expansion joints should be insulated by using proper profiles or mastics resistant to continuous water contact. Cementitous grouting materials are not appropriate for expansion joints.

Expansion joints should be provided at intersection points of deck and the shell of swimming pool.

Insulation details of structures on the covering (such as lighting armatures, discharge pipes, drains and faucets) should be sealed with CERMISIL NS.

CERMITHANE mastic can be used to fill expansion joints.

Wait for at least 7 days before filling the pool with water after finishing all tiling process.

Daily filling and discharging rates of water into the pool should be managed according to the specifications. Care should be given to the heating rate of water for thermal pool applications, and a heating rate of 0,25 °C / 1 hour should be ensured. Faster rates than specified may cause expansion problems and deformations on the covering.

TECHNICAL RECOMMENDATIONS

In order to prevent any collapse (cave-in) on the swimming-pool ground/floor 1 or 2 years after the application and to prevent displacement of tiles as a consequence of such collapse, filling materials used behind the solid curtain walls forming the pool and underneath the foundation concrete must be compressed sufficiently. Otherwise, it is likely that the tiles may collapsed, cracks will occur around the pool tiles and shells or will be broken into fragments.

If the pool rests upon an earth or ground, the movement of water (water leakage)

likely to come from the outside into pool shell must absolutely be prevented.

Due care must be exercised to ensure that lighting lamps to be installed inside the pool properly. The selection of lighting solutions and system’s, the water insulation must be carried out accordingly. If the system is damaged,there might be weak points for water leakage.

For over-the-terrace pool applications; due care must be exercise to ensure that

expansion joints are used for coating during the tile fixing depending on location of column&beams. If the pool is on the ground, expansion joints must be used for coating with 10-m intervals. It is strongly recommended that expansion joints must not be left inside the pool basin in order to prevent potential water leaks which might be available on pool terrace and basin junction point. Suitable profile solutions or suitable filling mastics resistant to pool water effects are recommended for expansion joints. Use of Polyurethane mastic for expansion joints is recommended.

Please contact technical service for more detailed information.