FLOORING/TILE WORK

1.    OBJECTIVE:

The objective of this method statement is to carry out the Tiling Works by meeting the technical specification and complying with Standards.

2.    SCOPE:

The scope of this method statement includes at all areas at CTSIL, CTSIL site while executing it in accordance with Technical specifications.

3.    REFERENCE 

·         IS-Codes

·         Technical Specification

4.    TOOLS AND TACKLES

·         Trowels

·         Line dori

·         Tube level

·         Plumb bob

·         Spacer

·         Measurement Tape

·         Spirit levels 1-2m

·         Sand sieve

·         Aluminium straight edges

·         Right angles

·         Chipping tools

·         Masons hammer

·         Rubber hammer

·         Levelling threads

·         Tile cutter

·         Masons brushes and buckets

·         Forma box

·         “ Good for Construction” Drawing

5.    METHODOLOGY

a)    WALL TILING 

·         All chasing for the concreted piping and electrical conducting etc. shall be carried out before commencement of work.

·         In order to obtain uniform tonality, it is recommended to mix tiles from different boxes for laying to great, harmonious tonality.

·         Backing plaster shall be initially carried out on the block walls so as to achieve a background that is fairly to plumb and at right angles in all corners. This plaster shall be furnished rough to provide key while fixing of the tiles.

·         The surface should be bone dry where adhesives are used for fixing the finishes.

·         Prior to commencement of actual finishing work approval of the PMC / QA-QC Engineer should be taken as to the acceptability of the surface.

·         The backing plaster shall be carried out not earlier than 7 days after the masonry has been constructed. So also, the ceramic tiling shall be fixed only after allowing a period of 7 days after the plastering, to allow for shrinkage of the plaster.

·         Cutting of tiles should be kept to the minimum. Cut tiles shall finish into internal corners and floor, wherever possible.

·         Make sure the distance from the skirting board or worktop to the batten is no more than on whole tile allowing the grouting gap. The main body of whole tiles – known as the ‘field – is fixed first and the adhesive is allowed to dry. Then the border or edge tiles are fitted.  

·         Tiles shall be soaked in water for at least two hours prior to use. Cement paste shall be battered on the back of the tile pressed on to the background surface and tapped gently with a wooden / rubber mallet. Any gap between the tile and the background shall be filed with cement paste so as to avoid hollowness behind tiles.

·         Wall tiles shall be fixed with a joint of 2.5mm between tiles. Proprietary spacers shall be used for achieving a uniform joint width in all directions.

·         Great care shall be exercised to keep all courses perfectly horizontal and perfectly vertical. From time to time, hold a spirit level or straight edge across the tile surface to ensure straightness.

·         All corners shall be provided with proprietary PVC corner strips and tiling started beyond the strip.

·         The joints shall be filled with a proprietary non – shrink waterproof filler material of matching color after a minimum gap of 24 hours and finished slightly recessed.

 
b)    FLOOR TILING

·         The concrete base to receive flooring shall be cleared off mortar dropping etc. and cleaned thoroughly.

·         For all types of flooring , skirting, dado and similar locations, the to receive the finish should be adequately roughened by chipping, raking out joints and cleaning thoroughly all dirt, grease etc. with water , hand brush and detergent, if required, unless otherwise directed by the manufacturer of any  specially indicated in the specification under individual item.

·         Cement mortar (1:3) screed shall be spread evenly in the room based on the “level dots” made already and tamped. The recommended thickness of mortar should be in the range of 25-30mm.

·         In order to obtain uniform tonality, it is recommended to mix tiles from different boxes for laying to great, harmonious tonality.

·         Cement slurry of ‘Honey’ like consistency (1 bag to 60 liters of water) shall be prepared and spread on the mortar bed to an extent that can be covered with the tiles within half an hour. The tiles shall be placed on the slurry coat matching all four corners and fixed in place with the help of a wooden/ rubber mallet.

·         Alternatively, tiles can be laid on a bed of adhesive using plastic spacers, to create a gap between tiles, which can be grouted later on. Lay around one sq. meter of adhesive at a time and press the tiles into place, with correct gap provided by spacers, available in different thickness.

·         Proper slopes shall be given in flooring of toilets and balconies to ensure quick drainages of water on the surface.

·         Floor tiles shall be laid with minimum joint width, which shall be grouted with a proprietary non – shrink, waterproof filler material.

·         After the tiles have been laid, clean the joints thoroughly with a brush to remove loose mortar before it dries up.

·         For the tiles to set properly it is essential to allow a 24 – hours setting period before filling.

DO NOT ALLOW ANYMORE TO WALK ON THE FRESHLY TILED SURFACE.

 

c)    GROUTING

·         Do not use cement.

·         The gaps between ceramic tiles need to be filled with grout. Plain and colored ready mixed grouts are also available. To spread the grout, use a rubber squeeze making sure it is pushed well into the gaps between the tiles. Remove excess grout regularly as it is difficult to get off once it has been allowed to harden. Wipe off the extra grouting (before it sets hard) with a damp sponge and polish with a dry cloth.

·         Filling of grout in the floor will be the last activity only to be done along snagging.

·         All grouts to be of lighter shade of the tile.    

 

6.      INSPECTION METHODOLOGY 

·         Check for conformance of the tiled pattern, specifications and tile grout   colour to the approved drawings.

·         Check for uniformity in line, level and grout thickness visually.

·         Check of straightness of tiled surface. The fresh tiled surface should be of proper level using a spirit level / Aluminium straight edge or line dori.

·         Ensure the cement and the sand have been checked / tested prior to tiling.

·         Ensure that no tile is broken / cracked and the joints are well filled.

·         Tap the tiled surface to check for hollowness. The tiled surface should be covered with POP / tarpaulin sheets to prevent damage to the tiled surface

 

7.    RESPONSIBILITIES.

·         Construction Manager: He shall be responsible for overall management of construction activities.

·         Site Engineer: He shall be responsible for Executing in safe work method as per drawings and guide the supervisors and work men.

·          Site Supervisor: He shall be responsible managing all plant and machineries and labour and safety of the workers

·         QA/QC In charge: He shall be responsible for ensuring the quality of work as per the specifications and standards.

·         HSE Manager/Engineer: He shall be responsible for assisting to engineer/supervisor to ensure the safety of workers during the progress of work. Safety inductions of each staff and workers shall be done and daily PPE check to be done and tool box talk shall be carried out before the start of work. General safety awareness as well as particular safety precautions and guidelines for activity to be carried out in that particular day shall be discussed. 

·         Stores officer: He shall be responsible for storing of all materials. Also responsible for maintaining the record of incoming and outgoing and up to date stock details of materials.