Index
Scope
Reference documents Definitions
Responsibilities Safety
Method Equipment
SCOPE
This statement is aimed to present the proposed procedures to be adopted to fix the
Ceramic wall tiles by bedding with an approved adhesive on one coat plaster applied according to the specification with the pre spatterdash treatment except on metal lathing where 2 coats are permitted with wood float finish, uniformly as thick as possible and not less than 8 mm or more than 13 mm
References
Specification
Safety
The work force shall receive every day prior to the commencement of any activity a Tool Box talk regarding operational safety according to the project requirements in addition to the use of personal protective equipment..
Specifically the personnel engaged on the tiling items shall use masks to prevent inhale the grout or the adhesive smell.
In the rooms where proper ventilation or the sunlight is not available, electric lights shall be provided with due care regarding protection from the electric wires ,the distribution board and the other fixtures etc.,
In hot weather standing upright fans shall be provided at the work areas.
The work area shall be closed to general workers on other parts and opened only after the tiles have been finally cleaned as well the space cleared of electrical fittings.
Definitions
PSM Project Site Manager CSM Construction Manager
CS Construction Superintendent
FM Foreman
QC Quality Control
Responsibilities
PSM shall control the overall operations
CM shall arrange the resources required accordingly
CS shall control, monitor and direct the FM and workforce for the operations FM shall execute the operations deploying the workforce
QC shall inspect all the operations according to the specifications EPC Contractor shall conduct surveillance
Material
Glazed Tile size specified 108 x 108 mm
Setting material (ultra set polyurethane adhesive ) recommended by manufacturer Cushion edges
Rounded external corners
Head Jamb and Cill trim shapes
Wain scot cap Surface bullnose or bull nose cap External corners Bullnose shapes or as specified Internal corners Field butted square
Grouting material Water proof epoxy tiling grout with antifungicide additive (Commercial white sanded latex portland cement type)
Method
Mesh reinforcement shall be incorporated in the plaster where
1 The structure is out of line and the thickness of the plaster exceeds 13 mm 2 The plaster is to be applied over different structural materials
3 The surfaces of the structural wall shall be subject to excessive movement .e.g., light weight concrete block of all types
Examination
The strata to receive the tiles shall be examined closely to ascertain that the moisture content are within limits to allow the fixing operation
Where the tiling is to be bedded in a thin bed adhesive, the trueness of the plaster shall be such that when tested with a 3 m straight edge no gap exceeds 3 mm
Statements were written by Professional Eng Suraj Singh Project Manager as well as Senior Project Engineer. Most of these were approved by EPC Contractor & Company (no sketches
Where the gap lies between 3 and 6 mm, if the walls are out of plumb by not more than 6 mm, a thick bed adhesive shall be applied in preferance to cutting the defective areas and making good
Deviation from true vertical or plumb in the surface of plastering exceeding 6 mm shall be made good
Thin bed adhesive shall not be used for fixing tiles with backs incorporating deep keys or frogs for which thick - bed adhesives must be used
Civil Contractor inspection followed by EPC Contractor approval
The tiles shall be set out before the work commences so that cut tiles be kept to a minimum and where they do occur be as large as possible
Joints shall be horizontal and vertical, with horizontal joints aligning in walls that adjoin or be adjacent
The tiles shall be neatly and accurately cut to close fit where necessary at abutments and around outlets, pipes and the like
The tiles shall be extended into recesses, under equipment and fixtures to form a complete covering without interruptions as well as terminated neatly at obstructions, edges or / and corners keeping the on going pattern or joint alignment. The tiles shall fit closely to the electrical outlets and fixtures allowing plates, collars, covers etc., overlap the tiles.
Movement joints not less than 6 mm shall be provided:
At all internal vertical corners
At all angles with structural walls and ceilings To form bays not greater than 3000x4500 mm Over all structural movement joints:
The joints shall be carried through the plastering to the structural wall, partially filled with an approved joint filler and finished flush with an approved sealant recommended by the manufacturer for the relevant situations.
Glazed edge tiles shall be used at the exposed edges.
The tiles shall be fixed in position prior to the adhesive gets dried for that it shall be prepared and applied on a small area not exceeding 1m x 1m at a time with a trowel to dry plaster surface in a manner recommended by the manufacturer followed by the tiles pressed firmly into with a twisting / sliding action tapping firmly and cleaned as soon as the bedding be completed.
The finished surface of the tile shall be firm and true such that when checked with a 3 m straight edge, no gap exceeds 3 mm
Civil Contractor inspection followed by EPC Contractor approval
The joints shall be grouted well to completely fill in as well as appear flush after the adhesive has set and not less than 48 hours post fixing. Surplus grout shall be cleaned off from the tiles surfaces as neatly as possible as the work proceeds using a damp cloth and the joints tooled smooth.
The grout haze shall be removed according to the manufacturer’s instructions for the use of acid and chemical cleaners
The tile work shall be rinsed thoroughly with clean water prior to and post using chemical cleaners followed by polishing with soft cloth.
Civil Contractor inspection followed by EPC Contractor approval
Equipment
Tile cutter
Attachment
Approved ITP Form
#50