MEASURES TO TREAT PEELING WALLS

1. What is the phenomenon of peeling walls?

Newly built houses often have very beautiful and smooth wall paint. However, some time after painting, some parts of your wall may peel off in small pieces or especially a large piece, making the wall unsightly and causing dust in the house. Especially in houses that have been used for a long time, the lime wall or paint becomes rough and easily peels off, revealing a very bad layer of brick mortar.

We can notice that in level 4 houses or old high-rise buildings that have been whitewashed or painted for a long time, the walls are often rough, moldy and many wall panels are bulging and peeling off, looking very unsightly and unattractive. luxury of the house, so we need to know how to handle peeling walls to create a more beautiful and confident living space.

2. What causes house walls to peel off?

2.1. Objective reasons

• The cause of paint peeling is due to exposure to high temperatures. Walls exposed to direct sunlight often have this peeling phenomenon.
• Almost all houses built from the 90s and earlier were built with lime mortar or three-composite mortar, often with moldy, peeling, blistered walls... Because the lime mortar or three-composite mortar used when building walls and plastering the wall over During a period of use, there is a relatively high hygroscopicity, especially in the rainy season, hot weather in high humidity environments or wall locations in contact with toilets, baseboards... susceptible to mold. and most peeling and blistering. Vietnam has a humid tropical climate, so the impact of the weather is inevitable, so houses made from unstable materials in the past will be quickly affected, and now we are worried about finding ways to deal with them. How to effectively peel off walls without spending much money.
• Not only due to temperature, wall paint can peel off, but it can also be due to water penetration. Over time, water will cause patches of paint to peel off, become rough, and become stained. For those who live in apartments, it will often appear in the corner of the balcony, the balcony on the upper floor has water stagnant, seeping down, the walls are patchy, stained and peeling.

2.2. Subjective reasons

• Due to unsafe painting techniques, do not prime or scrape off the old paint layer before applying the new layer. Or paint a layer that is too thick and too dense on a smooth wall surface.
• Due to the lime mortar mixing process, the ratio between lime, sand and cement is not correct. After a period of use, lime will dry out due to the lack of adhesive, leading to peeling walls and having to find an effective and costly way to treat peeling walls.
• Because before painting, the construction staff did not clean the wall of dust and dirt, leading to layers of paint piling up, and when it rains and gets wet, the paint will automatically peel off into pieces.
• Because the paint film has blistered or chalked when painting on a fresh, highly alkaline concrete surface, or the paint surface is constantly damp and has not been treated well against moisture.
• Construction under conditions where film formation is hindered such as too high or too low temperature or too much wind causes the paint film to evaporate too quickly. Therefore, the paint layer is not protected by the film and is easily damaged over time and affected by the external environment.
• Using poor quality paint will quickly cause the wall to become rough or the paint to blister.

3. The most effective way to prevent and treat peeling walls

3.1. Ways to prevent house walls from peeling

• Choose good quality wall paint and apply the correct layers to maintain the longevity of the wall at the highest level, without having to quickly proceed with the treatment of peeling walls.
• Choose a highly skilled and responsible painter and require proper technical implementation.
• Roof construction has a relatively large roof system to protect the wall from the impact of weather and moisture. We can use Thai roofs for houses with a large overall area, while other houses For narrow townhouses in urban areas, we should avoid creating a roof system because it will affect surrounding buildings.
• For interior walls, we use curtains to avoid direct light on the wall and can use wall protection materials such as wallpaper, by tiling on the wall in spaces prone to moisture. wet…

3.2. Instructions on how to properly handle peeling walls

There are 2 ways we would like to introduce for your reference on how to fix peeling walls:

3.2.1. How to deal with peeling wall paint?

Step 1: Prepare materials: Include:

• Fine sandpaper
• Primer, paint
• Paint brush or paint roller
• Cement, sand, trowel

Step 2: Scrape off the old paint and remaining powder, be sure to scrape it clean.

Step 3: To treat peeling walls, after scraping them clean, use sandpaper to sand the peeling paint on the wall, removing old layers of paint. This is a time-consuming process but is extremely necessary because if the old paint layer is not completely rubbed off, it will damage the new paint layer.

Step 4: Sweep away dust

To prepare for painting, after performing the above steps, you still have to do one more thing. That is to wipe away the dust caused by the sanding process as well as dirt on the wall. If not wiped clean, the paint will stick to the dust layer rather than stick to the wall. Paint longevity certainly will not be high.

Step 5: Apply the primer with a paint brush or; Paint roller on the wall to increase adhesion and leave at least 24 hours for the paint to dry.

Step 6: How to handle peeling walls more effectively when you plaster the wall to make it flat.

Step 7: Continue painting the first layer of paint with a clean roller or paint brush. Leave the first coat of paint for 24 hours to dry before proceeding with the next coat.

​Step 8: Apply the second layer and wait until dry. After the paint dries, you can use measures to deodorize the paint to avoid discomfort.

3.​2.2. Using chemicals on lime mortar walls

Step 1: Chisel out the entire layer of plaster on the wall that is damp, peeling, and blistering.

Step 2: Chisel the brick wall mortar joints about 1-1.5cm deep.

Step 3: Clean all mortar joints in the wall; Then apply mortar to the mortar joints; Drill 1-1.5cm deep so that it is flat with the edge of the tile; (Fix with mortar grade 75, mix the ratio of water and sika latex 50 + 50 into the mortar layer).

Step 4: Wait for the mortar layer to dry completely, then clean the surface that needs to be re-plastered.

Step 5: Apply 2 layers of oil paste to the entire wall surface.

​Step 6: For this peeling wall treatment; We also use Sika chemicals as the main material, waiting for the oil paste layer to dry completely; Apply 1 layer of Sika latex (or Sika latex TH) + with water + with cement; in the ratio: 1:1:4 (Sika 1kg - Water 1kg - Cement 4kg mixed together) on top of the oil slurry layer; to the entire wall surface to be plastered.

Step 7: Wait for the Sika layer to dry completely; Apply grade 75 mortar to the entire wall surface that needs to be plastered and you're done.

4. Some notes when handling peeling walls

- Add an onion that has been cut into small pieces; and put a bowl of water in the middle of the room while painting; Can help eliminate unpleasant odors of paint. You can also try adding a few drops of vanilla essential oil to the paint bucket to create a more pleasant smell.

- ​Make sure the painting area is well ventilated because fumes from the paint are hazardous to health.
- We can see the chalk phenomenon occurring on the wall; After proceeding with the treatment of peeling walls. After painting; Use your hands or a smooth cloth to rub over the paint surface; You can see the powder sticking to it. This happens when the solvent is mixed too much, the wall is damp or the paint is not of good quality.
- When "fighting" this phenomenon, the first thing to do is to remove the chalk layer; Scrub with a stiff bristle brush, then rinse with clean water. Using an oil-based primer is also a solution because it is chalk-resistant. You should choose good quality paint

- An entire layer of wall waterproofing can be used; from being absorbed upwards after painting old house walls.

5. Introducing a reputable design & construction consulting service provider

The importance of the construction unit is undeniable because their reputation will ensure the quality and aesthetics of your project. Today, there are many units providing construction design services to meet the increasing construction demand in our country. Therefore, finding a reputable unit is not easy and requires you to spend time researching. During the selection process, you need to research carefully and ensure that the accompanying unit must have high professional qualifications, many years of experience, have a clearly signed contract, transparent costs,... To Helps customers save time searching, Công ty TNHH Đầu tư Xây dựng Hưng Nghiệp Phú confident that it will be the best choice for you.

Hung Nghiep Phu Construction Investment Co., Ltd. with the mission of bringing the best solutions and services, building a prosperous community with customers, Hung Nghiep Phu is gradually asserting its brand through cooperation. Sincere cooperation, with a leadership team with ethical capacity, creativity, dedication to the profession and strategic vision. Hung Nghiep Phu owns a team of skilled and highly qualified staff who will bring customers the best quality projects. 

Hung Nghiep Phu Construction Investment Company Limited - specializes in constructing civil and industrial projects. We look forward to accompanying customers in construction projects as well as legal procedures such as planning diagrams, applying for construction permits, completing processes, and applying for fire prevention and fighting certificates. . ,... If you have any questions or are in need of designing or completing the process, please contact us immediately for a free consultation!

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