GAIL (India) Limited

5813.1.a3 Preparation of Surface:The surface shall be prepared by removing mortar dropping and foreign matter and thoroughly cleanedwith wire or fiber brush or any other suitable means as directed by the Engineer-in-Charge or Consultants.All loose pieces and scales shall be scrapped off and holes filled with mortar.For scaffolding and application of colour wash, relevant specification of item No. 1 shall be followed. Thecolour wash shall be applied as under.The colour wash shall be applied in accordance with the procedure given in item No 1 after the surfacehas been prepared The first primary coat shall be of white wash and subsequent coats (minimum two) willbe colour wash and the entire surface shall represent a smooth and uniform finish To start with, patch of0.1 sq mt on prepared surface shall be colour washed with first coat of white wash ad subsequent coats ofcolour wash solution in full numbers o coats as described in the item and the sheade is applied to thelarger surface.After the surface has been prepared a coat of white wash shall be applied for the patches and repairs. Thenone coat or more o colour wash shall be applied over the entire surface such that the colour washedsurface shall present a uniform colour shade. No primary coat is needed for a decorated surface bearingcolour of same shade on surface requiring change o colour after the surface has been prepared asdescribed above. Two coats of white washes shall be applied before application of specified number(minimum two) coats of colour wash of the new shade.13.1.a4 Protective measure:The surface off doors, windows, floors of furniture etc. And such other parts of the building not to bewhite washed shall be protected from being splashed upon. Such surfaces shall be cleaned of white washsplashed if any13.2 OIL BOUND DISTEMPER13.2.1 MATERIALSOil emulsion (Oil Bound) washable distemper (IS : 428) of approved brand and manufacture shall beused. The primer shall be of the same manufacture as distemper shall be diluted with water of any otherprescribed thinner in a manner recommended by the manufacturer. Only sufficient quantity of distemperrequired for day’s work shall be prepared.The distemper and primer shall be brought by the contractor in sealed tins in sufficient quantities at a timeto suffice for a fortnight’s work, and the same shall be kept in the joint custody of the contractor and theEngineer-in-Charge. The empty tins shall not be removed from the site of work, till this item of work hasbeen completed and passed by the Consultant / Engineer-in-Charge.13.2.2 PREPARATION OF SURFACEThe surface shall be thoroughly cleaned of dust. Any unevenness shall be made good by applying putty,made of plaster of Paris mixed with water on the entire surface including filling up the undulations andthen sand papering the same after it is dry.Pitting in plaster shall be made good with plaster of Paris mixed with the colour to be used. The surfaceshall then be rubbed down again with a fine grade sand paper and made smooth. A coat of the distempershall be applied over the patches. The patched surface shall be allowed to dry thoroughly before theregular coat of distemper is applied13.2.3 APPLICATION15 cm double bristled distemper brushes shall be used. After each days work, brushes shall be thoroughlywashed in hot water with soap solution ands hung down to dry. Old brushes which are dirty and cakedwith distemper shall not be used on the work.