EXTERNAL PAINTING WORK PROCEDURES

Procedures for External Painting Works (Cement & Acrylic):

Pre Painting Procedures:

1)    Experienced painters shall be employed to carry out all painting works.

2)     Color code and shade card from Manufacturer of paint in reasonable numbers shall be made available on site.

3)    It shall be ensured that all kinds of Civil as well as Electrical works are completed prior to start of painting works.

4)    Minimum 30-60 days gap shall be provided between starting of painting work and completion of plastering work based on type of paint to be used.

5)    Single / double scaffolding shall be erected as per required height.

Surface Preparation

1) After ensuring that wall surface is totally dry, it shall be brushed with emery paper (sand paper) to remove dirt, loose dust and efflorescence, if any.

2). Wire brush to be used for cleaning the surface for any algae / fungal developments if any. Water jet can also be used or both for the same.

3)    If any cracks are observed on wall surface the same shall be filled with Crack filling material and allowed to dry completely and cured, if required as per manufacturer’s specifications.

4)    Edges shall be particularly attended to and finished to line and level.

The entire plastered surface to be painted should be inspected for hollowness / voids, if any, and necessary rectification should be done as per the guidance of QA Department.

During Painting Procedure:

1)    Availability of all paints, glue and crack filling material shall be ensured prior to commencement of painting work.

2)    The surface shall be wetted at least 2 Hrs prior to painting for cement paint. For acrylic paint, wetting of the surface is not necessary. However, manufacturer’s recommendations should be followed for the same.

3)    Paint shall be prepared as per manufacturer’s instructions.

4)    When weather condition is very dry, the work shall be carried out ‘in the shadow’ by providing curtains.

5)    Paint in the buckets shall be continuously stirred to obtain uniform mixture and to prevent segregation.

6)    Waterproof polymer coat for dead walls is necessary to avoid leakages. However application of primer coat is also necessary before polymer coat or as specified by manufacturer.

7)     Anti fungal / repellent coat for all walls except dead walls is necessary to avoid development of algae / fungus on painted surface. This coat can be done with the help of spray machine.

8)     1^st coat of paint shall then be applied. Application with brush shall be one stroke downwards, one stroke upwards and one stroke from left to right.

8)    After cement paint has hardened (i.e. 12 Hrs after application of cement paint) it shall be cured. Curing shall be carried out by fogging (using a fog spray)/ sprinkling by water 2-3 times a day for 2 days.

9)     For acrylic paint curing is not required. Here a gap of minimum 8 hour should be maintained between two coats.

9)      In hot, dry weather, 1^st coat shall be moistened before application of 2^nd coat. (For cement paint only)

10)     2^nd coat of paint is then applied just like 1^st coat and cured in the same manner. Curing of 2^nd coat shall be carried out for at least 2 days. (Curing should be done for cement paint only whereas no curing is required for acrylic as well as textured paint)

11)     Painted surface can be protected from hot sun and wind by providing wet Hessian cloth barriers.

12)     3^rd coat shall be applied, if specified in work order / by Architect. 3^rd coat thickness shall be thinner than the first two coats.

However entire painting work can be done by spray machine.

Post Painting Procedures:

After application of final coat of paint satisfactorily, stains of paint shall be removed from doors and door frames, tiling, skirting and hand railing, windows including glass panes, M S Grills, electrical switch boxes etc.