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Painting Guide
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Exterior Painting Process :
Exterior house painting may seem similar to the interior wall painting exercise but some critical differences exist between them. Preparing and maintaining exterior surfaces is considerably different than preparing indoor surfaces where weather damage and wear and tear is generally not a concern. Thus, exterior house painting preparation requires more effort and time.
General Preparation :
  • Thoroughly inspect your home completely to find signs of blistering, peeling or chalking and also water damages which manifest as rot or discoloured areas. Identify areas of Mildew and mold which are to be taken care of.
    Remove light fixtures, decorations, shutters, mail box etc.
    Those items which cannot be removed like air conditioning unit, condensing units etc should be covered with a canvas or plastic to avoid paint splatter and chips falling on them. Remember to turn off power supply before the activity.

It is also advisable to cover the immovable plants with a canvas (not plastic) and if required to pull the bushes away from the walls by tying them with a cord to avoid obstruction in painting exercise.
Make sure you have a sturdy ladder. For larger houses, it would be more practical to hire a scaffolding service. Putty knife, masking tape, sandpaper, scraper and various everyday tools should be kept ready.
  Shades for exterior should be carefully selected. They should also complement the neighbours colour scheme to give better bring symphony to the external environment
  • Prepare a trash can lined with plastic bag to throw the wastes.
Surface Preparation :
As with interior painting, surface preparation is a very important activity that will directly affect the end result of your painting exercise. It is not only critical in getting good results; it actually helps save time and makes the painting exercise economical. Preparing proper surface can be considered as a make or break job because even the best paint will not adhere properly on the walls if they are dirty, wet or loose.

During the surface preparation exercise it is recommended that you wear safety goggles and a mask to avoid being exposed to unnecessary dust. Some items that you would require are Paint Scrapper, Putty knife, Sand paper, Sanding Block, Cloth, little water and a stiff brush.

  • Be careful on wood siding to avoid gouging the wood with a scrapper.
    Patching cracks - Dig out the cracks with the help of a screw driver to remove all loose material and fill them with plaster or putty mixture. When dry, smooth the surface with the help of a 220 grade sanding paper.
    Patching Holes – Dig out the holes a little to remove loose material and patch up all the holes using plaster, putty or lightweight spackle.
    Remove patches, mildews - If painting over a previous coat of paint, one must remove any mildew with a mild solution of bleach and water in a one-to-four ratio or with the help of a mildew cleaner.
    After all scrapping and patching it is advisable to sand the entire surface. An 80 grit sandpaper would be ideal. Take care to start sanding only when all the patching has dried.
    Now wash the whole house with water to remove dirt grease or any loose flaking paint.
    • Start the painting exercise only when the wall is completely dry.
First Primer Coat :
Primer coat is essential, especially when the walls to be painted are stained, porous, has water damage or mildew; or when we are painting a light colour over a dark colour or vice versa. Primers help provide a smooth surface, making the surface less absorbent, thus increasing the spreading capacity of the paint.

Primer helps give uniform colour and texture to the finished paint, and provide better adhesion to the top coats. Choose Primer to the kind of paint you are using, primarily consider their demarcation for oil-based and latex paints.

Apply the first coat and allow it to dry before application of putty coat (if required) or paint coat.

Putty Coat :
Putties are generally used in the case of fresh painting or walls that require total overhauling just like fresh walls, they may not be used for repainting or touch up exercises.

Wall putty should be applied to walls after first primer coat has dried. It will fill in minor cracks and surface imperfections, and provide a protective sub-layer for the expensive paint. As per the requirement 1-2 coats of putty can be applied, but do allow the previous coat to dry before applying subsequent coat

Second Primer Coat :
  • Generally repainting services require a single coat of primer, but for fresh surfaces or the surfaces that need considerable levelling and removal of undulations, two primer coats are required. Care must be taken that the second primer coat be applied only after the putty coat(s) has dried completely.
Finish Coat :
  • Generally two coats of finish coat are required to get the desired finish and colour. It is important that each coat must be completely dry before the application of next one. Please refer to the instructions with the paint purchased for finding out drying time and special instructions if any.
 
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