Painting Tips

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Wall Problem Tips

Painting Tips
Jul 27, 2022

Wall Problem Tips - Wall Blisters

When painting a wall, there are many factors that affect the final result, leading to all kinds of problems. One of the most common problems is blistering.

The phenomenon of wall blistering: bubbles are generated in the paint film, resulting in a decrease in local adhesion. There are many possible reasons for this to happen, here are the most relevant and common:
– Substrate humidity is too high
– Paint on soiled or decayed substrates
– Paint on overheated substrates or expose to direct sunlight
– poor working or drying conditions (e.g. high humidity, condensation, rain)
*TIP: Break the blisters and check the underside of the flakes. If wood is present, the problem is most likely moisture related.

It is not difficult to solve the blistering on the wall. First, confirm the cause of the problem and evaluate the degree of the problem. Then address the cause, strip off the old paint, make sure the substrate is in place and repaint. Be aware that some substrates are too damaged to be repaired and will need to be replaced.

Wall Problem Tips - Oil Sweep / Oil Roller Marks

After the paint has been applied, there are streaks left on the wall after drying, which is an unintentional texture left in the paint by the oil brush or reel. The main cause of oil swept/reel marks is due to the use of low quality/incorrect tools to paint, or due to poor workmanship (e.g. too fast or too much painting). The second is partially dried paint due to heavy brushing or rerolling, as well as objective factors of poor workmanship or the environment at the time of drying, such as overheating of the substrate and high temperature.

Don't worry if you find oil brushes/oil roll marks, lightly sand the affected area until smooth and repaint. To prevent the same problem from recurring, make sure to use high quality and recommended tooling equipment, use consistent painting techniques (such as applying oil reel pressure evenly from top to bottom) while keeping the edges wet. Make sure the workmanship and drying conditions are in accordance with the manufacturer's recommendations so that there will be no oil swept/reel marks. Also, in hot or windy conditions, the recommended amount of thinner can be added to improve workmanship.

Wall Problem Tips - Wall Powder

Chalking is one of the common problems with walls. As the name implies, the powder on the surface of the paint film is produced by the degradation of the paint binder.

The main reasons for chalking come from excessive exposure to sunlight and improper use of paint. E.g:
– Use interior grade paint on surfaces exposed to UV radiation.
– Surfaces where the painted surface has been fully exposed to strong sunlight for a prolonged period of time, and/or has an elevated salt concentration (eg coastal areas).
– Use dark paint, which absorbs more heat and UV rays from sunlight than lighter colors.
– Paint lighter than recommended thickness.

If the walls have begun to chalk, your best bet is to renovate. Wash the affected area to remove all surface contamination and powder, and repaint with a UV-resistant paint system. Remember to use a primer, which can resist corrosion, increase the adhesion of the topcoat, and make the paint not easy to peel off. When painting, make sure to apply the paint to the recommended coverage and add the proper proportion of water as recommended by the manufacturer, never over-diluting.

To minimize chalking in areas with high sunlight, it is recommended to have a maintenance schedule in place from the outset to ensure that the painted surfaces are cleaned and repainted within a predetermined time.

Need a professional to fix your wall? Nippon Refresh Service is your best choice! Click the link below and make an appointment now:

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