We all try to use modern, high-quality materials to decorate the walls of our homes, and paint is one of those materials that is always present in our interior design. And, of course, each of us, from time to time, is faced with the need to update a painted surface . A faded, flaking wall surface covered with paint is not aesthetically pleasing and does not protect the wall itself from negative influences. What to do if the paint on the wall is peeling? How to remove it and apply new paint? What tools are needed for this and how to avoid peeling paint in the future?
Depending on the degree of wear and area of damage to the painted surface, you have the option of restoring part of the painted wall, or repainting the entire wall. In any case, before you start directly painting a wall or a section of it, you need to do a number of simple but mandatory steps.
Finding out the cause of peeling paint
Before you start painting, you should find out why the paint is peeling . Paint that is exposed to active environmental influences - wind, rain, sun, and so on, will fade, fade, peel and flake in a few years and, in fact, this is a normal natural phenomenon.
Paint consists of colored powders, called pigments, mixed with a liquid base. The basis of latex paints is natural or synthetic latex, and when water evaporates, a single film is formed. Oil paints have a petroleum base, which is slightly more resistant to wear and tear. But both paints, regardless of the base, have their own service life and need to be updated over time.
It's another matter if the paint loses its appearance and performance properties ahead of time. Here it is worth thinking about it and finding out the reason for this.
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Network of small cracks
A defect in the painted surface, which appears as a network of small cracks, is called crocodile skin. The natural aging of solid paint films of oil and alkyd paints occurs in a similar way. Many longitudinal and transverse cracks are formed as a result of repeated cycles of shrinkage and swelling of wood. When a defect occurs one or two seasons after painting, it is most likely the result of technological errors.
Possible reasons:
- Applying oil or alkyd paint too thickly.
- Incompatibility of paint and primer - applying a hard coat to a weak substrate. For example, using an alkyd paint that forms a hard film over a latex primer.
- Using low quality oil paint.
Solutions:
Read also: What are booties and why are they needed?
- Remove the old covering.
- Treat the surface with protective agents.
- Prime and paint, paying attention to the compatibility of the primer and the paint used.
Why does paint peel off?
reasons for peeling, peeling or cracking in the paint, but it is quite possible to find them out and prevent another untimely repair.
Increased humidity in the room and humidity of the object.
Any paint can begin to peel if the painted surface is perfectly smooth and does not have minimal absorbent properties , or if there is moisture under the paint. This is why, for example, the wooden surface to be painted must be dry.
Another example. Often only one side of the wall is painted . If you are painting a room in your home, and the outer part of the wall is constantly getting wet, due to broken flashings or leaks in the roof, the paint will peel off prematurely as a result. This is a common problem with painting concrete because concrete easily absorbs water.
Often the paint peels off in the bathroom . There may be two reasons related to humidity:
- They began to paint the wall before it reached the required minimum degree of internal humidity.
- The humidity level in the bathroom was exceeded even before the paint on the walls or ceiling had completely dried. But in the case of a bathroom, there may be other reasons.
That is, it is not enough that the humidity in the room during repairs meets the requirements of the paint manufacturer. It is necessary that the surface to be painted is completely dry . Otherwise, the paint will lie down, but subsequently it will certainly peel off, come off or crack.
Wrong choice of paint
Another possible cause of peeling and cracking on a painted surface is the wrong choice of paint type. Each type of paint is suitable for use in certain conditions, for specific rooms. And if, for example, you apply water-dispersion (water-based) paint based on PVA in a room with high humidity, then don’t expect anything good from it.
Mismatch between the base of the old and new paint
It is possible that the paint that was used during the last repair does not match the paint that was previously used on the surface. A simple example: silicate paints based on liquid potassium glass should never be applied to a surface previously treated with an organic-based product.
The correct choice of suitable paint for the renovation of a particular room is no less important than compliance with the entire painting process. How to make the right choice of paint and varnish products for self-repair in an apartment, based on the aesthetic and technical side of the issue, you can read in the article: Choosing paint for renovation.
Painting was carried out in violation of technology
Gone are the days when the entire painting procedure was reduced to a can of paint, a brush and a wooden surface. The variety of paints presented on the construction market implies not only the possibility of choice, but also responsibility for use.
Whatever paint you choose - silicone, silicate, PVA-based, acrylic or any other, follow the application technology . Moreover, almost every manufacturer writes its own instructions for the use of its products (often due to the addition of uncharacteristic additives to the product base). Without meeting these requirements, you will likely end up needing more repairs.
That's why before you start renovating, you need to determine why the paint is peeling and eliminate the cause of the problem. What's the point of investing time and money with a high probability of returning to your original position?
If you decide to paint the walls yourself with your own hands, then you should know some of the nuances of the process that will help you avoid mistakes. The general rules for painting work on walls can be found in this article: General requirements for painting work on walls.
Keep the interior dry
Pay attention to the relative humidity inside the house. Try using kitchen fans or bathroom fans to keep moisture out.
The ideal relative humidity should be below 55% in the colder months, but if levels are much higher, use fans more often.
Removing old paint. Surface preparation
If you have identified and eliminated the problem of peeling, flaking, etc., then the next step is to prepare the surface. In order to remove all remnants of old paint, you can use an ordinary metal spatula or wire brush. At the same time, you may be surprised to find that even paint that looks pretty good peels off easily and without problems.
It is necessary to remove all the paint that is susceptible to peeling , otherwise, after a new painting, you will soon have to repeat the entire repair again. If you are planning to repair a separate section of the wall and have already removed all unnecessary paint in this area, you need to use sandpaper or a block to smooth the transition from the cleaned to the painted surface. You can do all these steps yourself with your own hands.
Bubbles
Such defects in wall painting occur if in some places there is no adhesion between the surface and the paint: for this reason, the paint film moves away from the surface, and swollen places appear.
Causes
You may encounter this problem if you apply alkyd or oil paint to a damp surface, or if moisture gets through the outer surface. Another reason could be an incorrect paint application technique or if you used a tool during application that was not suitable for its intended purpose.
Solutions to the problem
In order to make the elimination of defects in wall painting more effective, we recommend that you re-sand the surface at the site of the swelling, treat it again with putty, sand it again and repaint it with high-quality paint. If such defects in wall painting are present on the entire surface, then first, if possible, eliminate the source of moisture, clean, prime and repaint the surface.
Selection of the type and required paint color
If you paint a wall or a section of it in a few months, or even more so years, it is clear that the original color of the paint will not match the color that you have today. These are all the consequences of various environmental influences, especially sunlight, under the influence of which the paint becomes discolored. Of course, if you're painting the entire wall, you shouldn't have a problem with this.
The difference in color tone in a corner or other dividing line is usually not noticeable. But, if you need to repair only part of the wall, then any specialized department of a hardware store can easily help you. Just take a piece of old paint from the wall with you and the store will paint you exactly the color you need.
You can accurately select the color and tone , provided that you know the brand and number of the paint you used previously (although this does not provide a guarantee). But this, as practice shows, is only possible if you still have a jar of paint from a previous renovation.
The choice of paint when renovating is very important. Many people try to save money at the same time. When purchasing, they succeed, but later the “stingy” rule begins to apply. Some people don’t even suspect that today the construction market offers very durable paint and varnish materials.
Take advantage of current discounts
There are paints that allow you to paint tiles not only on the walls, but also on the floor, paint the refrigerator and washing machine. And if you follow the technology in the process, the updated facility will serve you for many years. You can see an example of using special abrasion-resistant paint in the article about renovating a kitchen with your own hands.
How to solve stain problems
Unfortunately, to create a perfectly painted wall, you'll have to start all over again. You need to do this:
- Pick up sandpaper, put it on the block and sand the surface;
- Then vacuum the wall or wipe it with a damp sponge to remove dust;
- Apply primer to the wall twice, let each layer dry separately;
- Apply a new coat of paint.
It is important to consider that you cannot paint only horizontally or only vertically. This can also cause stains. It is better to act with movements that imitate drawing the English letter W.
Painting the wall
Now you are ready to start painting your wall . Use a quality brush or roller and follow the manufacturer's instructions. It is recommended to use a special primer before painting.
The use of a special primer prevents the appearance of stains when painting wood, protects against excessive absorption of the first layer of paint and the influence of the painted surface on the paint itself. Also, priming before painting ensures more reliable adhesion of the paint to the surface being painted. Be sure to let the primer dry completely before applying the first coat of paint.
After applying the first coat of paint and drying, apply the second coat. This will add richness to your color and strength to the surface being painted.
If you have correctly identified the cause of paint peeling , eliminated it, prepared the surface for painting, selected and used the right paint following the technology, then you can rest easy - no new repairs are expected in the near future.
Tags
paint peeling repair wall cracking peeling
Use of specialized tools
Various products contain a complex of substances that have an effective effect. After surface treatment, the layer gradually softens and begins to peel off. After this, the processing must be done again. This is carried out until the surface is completely clean.
Typically, metal paint removers contain caustic soda. It is the main component of the composition. In addition, additives of substances are used that reduce the level of evaporation. Paraffin or wax is used for this purpose. It must be remembered that after using such cleaning products, you cannot immediately apply a layer of new paint. Before this, it is imperative to degrease the surface.
Effect of chemical remover Source otdelkasten.com
There are different types of paint removers. The most popular are special gels and cleaning pastes.
When choosing chemical removers, it is necessary to take into account that they can be different:
- Some products are universal in nature. They can be used for most types of paints. Others will only be effective against specific varieties. For example, removing latex or acrylic coatings often requires specialized products.
- Such compositions differ in the degree of speed of action. In some cases, for an effective effect you will have to spend several tens of minutes, but when using express formulations, the result can be achieved in just a few minutes.
Paint cleaning procedure Source nashaotdelka.ru
- Sometimes removers are used for work, which contain only active components designed to soften the coating. However, such compositions can evaporate quickly, which reduces the effectiveness of their effects. In order to avoid this, special additives may be present in the composition. Slow down evaporation. When choosing cleaning products, whenever possible, choose the latest ones.
- Another important difference is the consistency of the product used. If the composition is liquid, then it can only be applied to flat surfaces. Gel washes are more convenient to apply. Paste-like compositions are convenient for cleaning difficult surfaces. Products sold in powder form are also used.
The principle of action may vary: metal paint removers can be alkaline, acidic or organic. The former are used for aggressive and quick washing. Using an organic composition is less effective, but is completely safe.
It is more convenient to clean horizontal surfaces than inclined or vertical ones Source syntilor.ru
Tree resin yield
Bleeding of resin in the area of knots is a common problem when painting softwood. As the resins seep through the surface of the paint, they form brown and red spots.
Possible reasons:
- Use of knotty wood with a high resin content.
- No pre-treatment: de-resining, painting knots with a special agent.
How to rip off?
It’s an unpleasant task, but if you have to do it, I recommend moistening the ceiling gradually with a roller. You can use a rag, but it’s not so convenient and it leaks a lot.
I moistened a strip 40-50 cm wide and went to scrape it with a spatula 80, 100 or 150 mm wide. Any one is suitable, whichever is more convenient.
If you peel even a little, the base of the ceiling will be damaged (photo 3)
, so it will have to be puttied. I did this with regular finishing putty. It’s good if the putty matches the color of the ceiling, but you can use something darker, as it happened for me - the owner suggested a brownish one.
After the putty has dried, you can go over the ceiling with a fine sanding mesh or sandpaper to remove unevenness. To guarantee it, it wouldn’t hurt to prime it as well. If you don’t want to prime, then you need to roll it with the same damp roller and it will collect dust. And only then start painting the ceiling again.
Here it is, the finished ceiling. It didn’t all happen quickly, but I managed it in a whole day. Two layers of paint completely covered the dark putty. In the end everything is OK!
Why does the ceiling crack after renovation?
Cracks in ceilings can appear due to shrinkage, vibrations of the house structure caused by an earthquake, poor-quality sealing of tile joints, the use of low-quality materials, lack of primer and putty layer, flooding by neighbors above, and so on.
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