Construction

Surface Preparation and Painting Tips

 

Surface Preparation

The preparation of a surface is 90 percent of painting job. Even the highest quality paint won’t adhere properly if the underlying surface is not prepared properly. Good surface preparation means clean and smooth surface.

Tips for Surface Preparation

  • Allow newly plastered surface to mature for a period of at least 6 months before painting.
  • Rectify existing surface problems such as dampness, cracks etc. before actual painting process.
  • Check for hand prints, greasy fingerprints, algae as well as dirt and stained marks. 
  • Use a scraper, putty knife or scrub brush to remove any dirt, grease, rust, or flaking.
  • Fill in the holes, cracks and joints with plaster.
  • Clean and dry the surface. 
  • Make sure the area to be painted is well ventilated as well as free of dust.
  • As far as possible, don’t paint under much humid conditions.

Checklist for Painting Work  

  • Check all masonry surfaces, voids, pores and cracks are filled with filler. 
  • Make sure the wood surface is free from all loose dust. Smoothly sand it along the particles with Emery paper).              
  • Check all nail holes, cracks and other defects in wood surfaces are properly filled and smoothed.
  • Apply sandpaper or wire brush to remove rust, grease, oil etc. on steel surfaces. The surface should be dry and free from moisture or loose matter 
  • Check the use of primer on painting of new surfaces. 
  • Ensure adherence and reliability of old paint in repainting works. 
  • Verify quality and make of the paint.
  • Confirm uniformity of thickness for application of each coat of paint. 
  • Observe painted surface for paint drops, brush marks, waves and for variation in color, texture and finish.
  • Check the places that are difficult to reach such as edges, corners, gaps, cracks. Ensure the joints, bolts and nuts are properly painted.

 
 

Coverage Area per Coat

 S.No  Name of paint Area coverage of one coat (old work)  Area coverage of two coat (new work)   Area coverage per additional coat
 1  Synthetic enamel paint

 14 sq mt/lt.

 8.5 sq mt/lt

 18 sq mt/lt

 2  Plastic emulsion paint

 14 sq mt/lt

 8.5 sq mt/lt

 18 sq mt/lt

 3  Oil bound distemper

 10 sq mt/kg

 6.0 sq mt/kg

 12 sq mt/kg

 4  Dry distemper

 14 sq mt/kg

 6.5 sq mt/kg

 12 sq mt/kg

 5

 White wash

 10 sq mt/kg of time  4.5 sq mt/kg of lime  10 sq mt/kg of lime
 6  Cement based paint

 4.5 sq mt/kg

 2 sq mt/kg

 6 sq mt/kg

 7  Aluminum paint

 20 sq mt/lt

 12.5 sq mt/lt

28 sq mt/lt

 8  Bituman paint/black japan

 14 sq mt/lt

 14 sq mt/lt

 28 sq mt/lt

 9  Neeru(or lime punning with slacked lime) over plaster  0.5 sq mt/kg of slacked time            __         __
 10  Red oxide metal primer  16 sq mt/lt(new work before painting)            __         __
 11  Cement primer  12 sq mt/lt (new work before painting)            __         __
 12  Wood primer  13 sq mt/lt(new work before painting)            __         __
 13  Wax polishing of new wood work with ready made polish

 20 sq mt/kg

 12 sq mt/kg

 20 sq mt/kg

 14  French or spirit polish

 10.5 sq mt/lt

 8 sq mt/lt

10 sq mt/lt. 

 15  Varnish

 14 sq mt/lt

 8.5 sq mt/lt

18 sq mt/lt


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