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Thursday, April 28, 2022

Types of Paint Used in Construction and Its Uses - Homeslibro

The painting industry caters to both industrial painting (as in automobiles, ships, etc.) and decorative painting. In building construction, we are interested only in decorative painting. The materials used for painting buildings are usually one of the following:


1. Lime (fat lime) for whitewashing.

 

2. Materials for colour washing: They contain fat lime with colouring materials.

 

3. Cement paints: These are made from cement and additives. They can be used on plastered brick, concrete, AC sheets, etc.

 

4. Dry distemper is a water-based natural substance such as chalk or acrylic materials in powder form.

 

5. Oil bound distemper: Oil emulsion type (with natural or acrylic materials as base) comes in thick paint form. It is generally called OBD.

 

6. Oil paints: These are cheap paints consisting of oil as base, pigments and a drier.

 

7. Plastic emulsion paints are water-based paints with acrylic builders.

 

8. Enamel paints: These contain resinous matter which forms a smooth hard film. The resins may be ordinary natural resins obtained from materials such as turpentine or maybe plastic alkyd resins as in synthetic enamel paint. These are used on metal, wood, etc.

 

9. Exterior paints are acrylic or cement paints specially made for exterior use.

 

10. Primers for paints: There are different primers that have to be applied to surfaces before applications of the paint. They provide the base for a good paint job. We have different primers as follows:

(a) White cement primer is used as a primer for the plastered surfaces.

(b) Metal primers: Red oxide zinc chrome primer (IS 2074-1979) is used for steel as primers. Simple zinc chromate primer is used for aluminium and it can also be used for steel. (These primers are more effective than the simple red oxide primer paints used in former days.)

(c) Wood primers: Pink wood primer, aluminium paint or boiled linseed oil can be also used as a primer for wood

 

11. Varnishes and polishes for woodwork.

These materials and their covering capacities are described in the book on Building Materials. In a middle-class single- or two-storey residence, we may choose cement paints (especially those not requiring water curing) for the exterior and interior walls. For interior walls, we may also use the more expensive distempers, enamel paints or acrylic emulsion paints. In this chapter, we will deal only with the important considerations in choosing paint and carrying out the work in building construction.


It is also of interest to note that certain architectural features can also help maintain the beauty of painted external walls for a longer period. Protection of painted external surfaces from rain by means of ample overhang at eaves is sloped roofs and continuous projections such as sunshades or other features in RC roofed buildings can protect the walls from discolourization and fungus growth, especially in regions of heavy rainfall. These should be incorporated at the planning stage.


Must read: Guidelines of Home Painting

Must read: How to do whitewashing and colour washing

Must read: How to Do Painting With Cement Paint

Must read: How to Do Painting With Dry Distemper

Must read: How to do painting of plastered walls with plastic emulsion paint

Must read: How to do painting iron and steel with enamel paints?

Must read: How to do painting new / old woodwork with synthetic enamel paint

Must read: How to do polishing wood which has attractive grains?


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