What to do when there are bubbles, peeling, breaking, mold problems in the wall paint

Brush the moldy area with a layer of anti-mildew agent for wall paint, even if it is wet, it will not become moldy.

a, paint peeling, paint peeling reasons:

1. The base layer is too smooth, if the base coating is varnish or powder paint, the new paint will not stick firmly.

2. Wood decay or metal rust.

3. If the paint quality is poor, choose the best paint (such as the lacquerer).

Solution: 1. Small area falling off: you can use fine sandpaper to polish, then apply putty, brush primer, and finally repaint.

2. Peel off a large area, peel off all the paint and repaint.

b, blistering, blistering detection:

1. If there is water in the bubble, it means that the base is damp.

2.If there is no water in the bubble, it may be caused by cracking of the wood.

Solution: 1. Water in the bubble: You can use a hot air spray gun to remove the blistered paint, let the wood dry, and then brush the primer and repaint.

2. There is no water in the bubble: you can scrape off the patent leather first, fill the cracks with resin, and re-paint.

C: Fracture, possible causes:

1. Poor paint quality.

2. The paint brush is too thick.

Solution: 1. Large fracture range: remove the paint with a chemical paint remover hot air spray gun, and then re-paint;

2. The fracture range is small: use the sand grinding block to dip the water, grind off the paint, wipe the putty after polishing it smooth, brush the primer, and then repaint.

D: Moldy, possible causes:

The construction speed is too fast, the wall is not dry to carry out the next process, after moving in, the water vapor breathed by the person combined with the latex paint, will also lead to blistering or mold, and finally peeling.

Solution: Use a biocide, then clean the surface and repaint.

Paint is one of the wall decoration materials in home decoration. There are many owners who often encounter the phenomenon of paint peeling off the wall not long after the renovation, why does the paint fall off the paint in the house that has just been renovated for a long time? In the face of this kind of problem, what should we do to deal with it?

Common problem 1 of home improvement wall paint: paint peeling.

Maybe it's because the surface is too smooth. If the original paint is varnished or powdery (with untreated colorant paint), the new paint will not stick to the surface. There are also hail scars that have rotten wood or rusty metals, and may also peel off due to poor paint quality.

If the paint peels off in a small area, you can first polish it with fine sandpaper, then apply putty, brush the primer, and then repaint. Extensive peeling must be scraped off and repainted.

The second common problem of home improvement wall paint: paint blistering.

First of all, the bubble is punctured, if there is water sprayed, it means that there is moisture seeping under the paint layer or behind it, and after the sun, the water evaporates into vapor, and the patent leather will be blistered. At this point, the blistering paint is removed with a hot air spray gun, the wood is allowed to dry naturally, then the primer is applied and finally the entire repair surface is repainted. If there is no water in the bubble, it is likely that the wood grain is cracked, and there is a small amount of air inside, and after the sun, the air expands, and the patent leather bulges.

In the face of this situation, the blistered patent leather is scraped off first, and then the cracks are filled with resin filler, and the source limb paint is re-applied, or without filler, after scraping off the patent leather, the microporous paint is directly applied.

The third common problem of home improvement wall paint: cracks.

In most cases, the paint is removed with a chemical paint remover or a hot air spray gun, and then repainted. If the fracture range is not large, you can use a sanding block or wet and dry sandpaper to dip it in water to grind off the broken paint, and after the surface is smooth, apply putty, brush with primer, and repaint.

Common problem 4 of home improvement wall paint: stains.

There are many reasons why paint surfaces can develop stains. For example, the moisture in the latex paint dissolves the substance on the wall and rusts the paint surface, the wall surface rubbed with steel wool will produce rust spots, and the dark pipe in the wall leaks and stains.

In order to prevent stains, you can first brush a primer containing aluminum powder, if there are already stains, you can remove the stains first, brush the primer with aluminum powder, and then repaint.

Different walls are in different environments (the bathroom is damp, the bedroom is dry), and soon after the decoration, it is found that there will be blistering, and even blistering when spraying paint, so what is the cause of blistering on the wall? I'm going to give you a detailed analysis next.

First, the reason for the blistering of the wall paint.

1. Painting in one step, too thick once will produce bubbles, paint (especially latex paint) at least twice;

2. If the spraying method is adopted, the spraying pressure is too large, and a large amount of air will be mixed into it, causing blistering;

3. The temperature is too high when spraying, or the relative humidity of the air is too large;

4. The temperature difference between the painted and painted walls is too large, and there will be bubbles after decoration;

5. If there are dust, sweat, oil and other impurities or dirty things on the painted wall, there will be gaps in the process of painting;

6. When the heated dry coating is used, the temperature is too high, the coating is not placed for long enough before heating, the solvent is not fully utilized, and the coating itself brings bubbles, so a stirring will also cause bubbles to occur.

2. How to avoid bubbles in front of the paint.

1. Check the process conditions of spray painting, adjust the appropriate paint viscosity, use an appropriate amount of curing agent and thinner, and it is best to control the thickness of the coating, and do not apply it very thick at one time.

2. It is to do a good job of filling and sanding the substrate, eliminate the pollution of the substrate itself, adjust the appropriate air pressure, and reduce the possibility of air mixing;

3. Improve the working environment, make the temperature and humidity as suitable as possible for the wall paint, extend the span between the two sprays as much as possible, let the lower layer fully dry, and place the paint for about 20 minutes after adjusting before spraying;

4. When using the heating drying coating, control the time of placing it so that the solvent can be fully exerted, and then preheat the coating.

I suggest that the painting construction is not complicated, as long as you are careful and pay attention to certain points in the process, the decoration effect will naturally be better.

1. The reason for the blistering and peeling of the wall paint: the waterproof treatment of the first line of celery during civil construction is poor, resulting in rainwater moisture entering the base on the other side of the wall through cracks or without the base surface of the sun's paint, or there is water leakage, and the paint film is damaged when it spreads; The wall base putty is mainly gypsum powder, talcum powder, and double fly powder, which is caused by the expansion of water, especially for exterior walls. The moisture in the wall substrate is too high, and the pressure of the moisture spreads outwards to bulge the paint film, which usually occurs on the wall with products with poor air permeability; 2. How to deal with the problem of wall paint blistering and peeling:

Remove all blistering and peeling parts, if the problem is caused by the putty on the wall base, remove the putty and re-scrape it with a suitable putty; Follow the construction specifications and do a good job of the waterproof layer of the wall base. Before construction, repair the cracks in the wall substrate to ensure that the moisture content of the wall substrate meets the construction requirements, and add a coating in the local area if necessary to prevent rainwater moisture from penetrating.

1. Reasons for blistering wall paint:

1) The putty powder used in the original wall has low gum content, the powder is too large, the particles are coarse, the oxidation reaction is long, and the water vapor in the air is absorbed for a long time, so that the putty layer of the wall is loose. In addition, our base film and glue contain a lot of moisture, which makes the already loose putty layer more wet, which causes the putty layer to swell and detach from the original wall surface and bubble.

2) The original wall was not painted with an interface agent before the batch of putty, the powder of the wall was too large, and the putty layer and the cement mortar wall were not completely bonded after the batch of putty, and our base film contained a lot of water, which caused the putty layer to be wet and expanded and separated from the original wall, causing the wall to bulge and blister.

2. Wall paint blistering solution:

1) In order to prevent the appearance of bubbles on the indoor wall, we must follow the correct construction standards when decorating, do a good job of the waterproof layer of the wall base, and repair the cracks at the wall base. After decoration, the wall cannot be air-dried quickly, but must be shaded to prevent the inside of the paint from drying completely. In addition, it is necessary to ensure that the moisture content of the wall substrate meets the construction requirements, and if necessary, add a paint layer in the local area to prevent rainwater from seeping.

2) When bubbles appear on the wall, all the blistering and peeling parts should be removed first, but if the problem is caused by the putty at the base of the wall, you need to remove the putty, and choose the appropriate putty to scrape again.

3) The air bubbles on the wall are eye-catching, and daily maintenance must be done. Daily maintenance must always check whether there is leakage in the wall water pipe, if leakage is found, it must be dealt with immediately, so as not to cause the putty and wall paint to bubble soft, resulting in blistering of the wall paint, which will make you regret it.

Causes and solutions of wall paint blistering and peeling.

Reason: The moisture of the wall substrate is too high, and the pressure of the paint film is bulged when the moisture spreads outward, which usually occurs on the wall with products with poor air permeability;

Poor waterproofing treatment during civil construction leads to rainwater moisture entering the base on the other side of the wall through cracks or unpainted substrates, or there is water leakage, which destroys the paint film when it spreads;

The wall base putty is mainly based on stone grinding and plaster powder, talcum powder, and double flying powder, which is caused by water expansion, especially for exterior walls.

Solution: Remove the blistered and peeling part of the finger mark, if the problem is caused by the putty on the wall base, remove the putty and scrape it with a suitable putty;

Follow the construction specifications and do a good job of the waterproof layer of the wall base. Before construction, repair the cracks in the wall substrate to ensure that the moisture content of the wall substrate meets the construction requirements, and add a paint layer in the local area if necessary to prevent rainwater moisture from seeping in.

Then please find a skilled painter again, remove the blistering area, and repaint.

Wall blistering, most of them are caused by alkali of cement wall, in the newly renovated wall water is not completely dry, begin to scrape the bottom ash, one or two months of internal moisture will evaporate the alkali in the cement, line into crystals and begin to expand, the gray surface out of the "blistering". the solution; Wipe the blistered wall ash clean, expose the water surface, and let it dry for a few days. Then spray the cement wall with white cool, and then scrape the wall with water and vinegar.

It won't blister anymore.

The inside and outside of the wall is partially moldy and blistered. This is caused by the excessive water content of the wall, and there are two reasons for the excessive water content, one is the water seepage caused by the rupture of the outer wall, and the other is the water leakage on the upper floor.

If the exterior wall is leaking, you need to deal with the damaged wall first, and if the upstairs is leaking, it is also necessary to ensure that the upstairs is not leaking.

The plastering layer of the wall mortar must be removed, the moisture in the wall must be dried thoroughly, then re-plastered, and then the latex paint must be scraped white.

The local mold blistering and falling of the wall is mostly caused by the alkali return of the wall after being damp, and the solution is; 1 Find the cause of moisture return, 2 Shovel off the moldy and blistering part, do anti-alkali treatment, and then do it again, the problem can be solved.

It may be caused by dampness and poor ventilation in the house, and mildew. Bubbles.