Painting is an expensive work in house construction. If the home owner does not have a basic understanding of painting, the chances of getting into trouble are high. Among the painting workers, there will be those who are veterans and those who come to work for that day only . If the owner is not aware, everything will be messed up. If properly painted, it will last for 5–7 years without damage. Lack of skilled workers in the field of painting is a big problem. In painting 60 percent of the expense is the labour cost. It is estimated that the services of experts and mechanization can reduce the expence by half. There are many ways to apply paint including brush, roller and spray. Now machine-assisted painting is becoming widespread in many places. There are different types of paints for exterior and interior walls.
Things to note while planning for painting
The moisture in the air makes it difficult for paint to dry completely because the water in the paint does not evaporate easily in high humidity. When the paint is applied at lower temperatures in high humidity, condensation can occur on the surface of the paint.
Cracks in the wall : When we are about to paint or plaster a surface, we are occasionally get puzzled by a crack. It is important to properly repair cracks in walls before painting.If we don’t fix the cracks correctly, it will eventually show up over the new coating. Cracks and holes in the wall should be filled with plaster of paris before painting. Clean the area with a putty blade.
Peeling of plaster : The plaster from some portion of the surface comes off and a patch is formed. This is termed as peeling. It is also mainly due to bond failure between successive coats of plaster. first such maintenance should be done. Wet it and give it time to set and dry. Paint only after that. It may take at least two weeks.
White ciment before painting : As white cement has iron and magnesium, it provides adhesive strength to the walls. It also has the property of resisting the stains, unlike the grey cement. It also gives a base for the paint colour. It also helps in filling up the gaps and primes the walls for the paint.
Sanding before painting : Before painting the old wall, the old paint should be completely removed with sand paper. Sanding serves to remove imperfections on walls, creating a nice smooth finish while at the same time adding adhesion by developing small, rough ridges for the paint to stick to.
Say goodbye to moss: There is no point in painting without completely removing moss and mold. Fungicidal Solution is a solvent-based, anti-fungal solution that is recommended for treating fungus-affected areas before painting. Due to its superior fungicides suspended in solvent-based solution, it penetrates deep into the concrete plaster to kill fungus and provides a surface that is in sound condition for subsequent painting. Spray it and washed off after 10–12 hours. When the wall is dry, it is ready to paint it.
Primer first: Apply a coat of primer on the putty areas and let it dry for 10–12 hours. After that, primer should be applied to the entire wall. Then do not avoid the putty place. The point is to apply two coats of primer on the putty area and one coat elsewhere.
Which comes first putty or primer?
To fill the imperfections of the wall, even the smallest cracks, requires you to apply wall putty after a coat of primer, following the same with a subsequent coating of wall putty. Putty fills in minor cracks and holes and removes any undulations on walls. A primer is a substance that is used as a pre-coat before paint application on any surface. Allowing the primer to dry completely before the application is vital, for a flawless finish. Apply a coat of primer on the putty areas and let it dry for 10–12 hours. After that, primer should be applied to the entire wall. Then do not avoid the putty place. The point is to apply two coats of primer on the putty area and one coat elsewhere.
Interval Important: Paint should be applied only after applying primer and make sure to get it dried. It will take 10–12 hours for drying.
Temperature best for painting: temperature must be above 10°C and below 35°C throughout the painting process. You should generally avoid painting in extremely hot or cold conditions. Avoid painting when the humidity is 85% or more.
How long should the interval be, if it is a dark paint, it can be three coats and one coat.
Water for dilution: Consumers prefer paints that can be mixed with water. The paints are majorly classified as water-based paints and solvent-based paints, on the basis of base used. Though decades ago, virtually all paints were solvent based. Water based coatings have a really quick dry time and can be ready for recoating in 2 hours. With little to no smell, it creates a more pleasant painting experience and makes the environment children friendly. Solvent-based paints contain organic compounds as solvents. It demands a persistent dry time. These paints also carry an overwhelming odour that can be disturbing to children. All these attributes, make it an ideal choice for exterior coating rather than the interior.
How many coats of paint: Dark colors are often the hardest for a painters to use appropriately and get satisfactory results, because it’s difficult to get the pigment evenly distributed. You will have to use more coats of paint with a dark color than the lighter color.