Shree Ram Commercial Corporation GLASS MOSAIC TILES

• The surface should be VERY SMOOTH (Smooth plaster with neat cement finish).
• The line and level should be perfect and without any undulation.
• The final finish plaster surface should be properly bonded with the main structure and when tapped with a piece of iron no hollow sound should be observed.
• Expansion joints are to be provided as per the requirement of standard code or recommended.

• The structural cracks in the surface if seen should be repaired after making a V- cut at the line of crack and filled with rich concrete or mortar. In case if the nature of the crack is major the repair should be done in the same way after providing chicken wire mesh (which should be fully embedded inside the plaster).

• Many times holes are left after the scaffoldings are removed from the walls. Providing chicken wire mesh hole with rich concrete should also repair these holes.
• In case of concealed pipes, around the pipes chicken wire mesh should be provided before filling the surroundings of the pipes and covering with the plaster.
• The corners should be perfectly linear.
• At the round edges the minimum radius should not be less than 40 mm.
• There should not be any seepage or leakage through the wall structure. In case of swimming pools or water retaining structures, proper water proofing treatment is necessary. The test for waterproofing should be done after filling the water in the pool for atleast 5 to 7 days and observation should be made for decrease in the water level.
• The surface should be completely dry at the time of fixing of the tiles.
• The surface should be free from any impurities.
• For the concrete walls in swimming pool more undulations or bulging of walls are noticed due to improper shuttering or failure of shuttering. A sketch showing the common problem and the precaution to be taken is enclosed herewith.

INSTALLATION CONDITION

• Avoid unfavourable application condition : rain, strong wind, frost, direct sun etc.
• The tiles should not be fixed on irregular or non-resistant surface without prior preparation.

• Leave joints at least 1.8 mm between the tiles / sheets.
• The existing expansion joints on the substrata should not be covered with the new cladding materials.
• On large surface provide expansion joints with elastic grouting or suitable profile (for every 7*7 m or 50 sq.m.)
• Provide for an elastic joint between vertical and horizontal surfaces so as not to be done for the angles and corners of the large room.
• The same procedure is to be done for the angles and corners of the large room.

• The tools used should be suitable for achieving the required thickness as recommended.

For fixing the bisazza mosaic tiles the adhesive and cement to be used should be as recommended by Bisazza India.

OPEN TIME: Maximum time between the spreading of the adhesive on the substrate and the fixing of the tiles.

ADJUSTABILITY TIME: Time available for adjusting the position of tiles after the fixing.

SLIDING: Capacity of the adhesive to resist the vertical sliding of the fixed tile depending on the dimension and weight.

RESISTANCE TO WATER: Capacity of the adhesive to maintain its quality in continued contact with water.

PRACTICABILITY: Minimum necessary time, after the fixing, for trafficking on the works without risk of them becoming debonded. It is necessary to distinguish among the following cases: traffic in order to execute the joints, light traffic, heavy traffic.

DEFORMABILITY: Capacity of the adhesive to flattening under the tiles to obtain a maximum surface of contact substrate / adhesive, the tapping pressure on the tiles and the open time.

FLATTENING: Capacity of the adhesive to flattening under the tiles to obtain a maximum surface of contact substrate / adhesive, the tapping pressure on the tiles and the open time.

The longer the time elapsed between the spreading and the fixing, the more difficult is the flattening. As such, more pressure is required.

• The plaster on the surface should be properly bonded with the structure i.e. there should be hollow sound if the surface of plaster is tamped by a small iron hammer or a piece of iron.
• In case of sudden change in slope of floor in swimming pool it is recommended to provide expansion joint at the point of change of slope.
• In case of slope changing gradually there is no need to provide the expansion joint at the pool floor.

NOTE :

All the above mentioned specifications are only for the concrete surface. In case the Bisazza glass tiles are required to fix on any other surface other than concrete surface, it is advised to contact Bisazza India for obtaining the best results before the tiles are fixed.

LEVELNESS:
The substrate must be levelled to avoid aesthetic defects of the installation, which could prejudice the proper maintenance of the tiles on the floor (don't confuse levelness with flatness).
The plainness of the support is to be verified with a 02 mm straight edge. To proceed to direct fixing defects must not be over 07 mm under the straight edge.
If the defects don't exceed more than 20% of the total area, on a continuous surface of 01 sq.m. the defect is said to be localised. If the defects so exceed the defects are said to be generalised.
 
HARDNESS:
The substrate must be solid, sound, non-friable and crack resistant. To check the hardness of the surface various sketches are made with the help of a nail. The scratch must be superficial.

STABILITY:
The substrate must be stable to avoid after installation problems.

POROSITY:
The absorption rate of the cement substrates must be normal to avoid premature drying of the adhesive so as not to shorten the open time the surface should not be water absorbent.

ADHESION:
He old wall cladding must be well bonded so as to avoid any detachment. Verify the adhesion of the old tiles or of the rigid panels by tapping with a hammer or a trowel.

CLEANING:
The surface must be clean to allow adhesion of the adhesive.

HUMIDITY:
The substrate must be dry.
 

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