What does wall alkali reaction mean? Where is wall alkali reaction likely to occur?

We all know that when a house is renovated for a long time, various problems will easily occur. Alkali on the wall is one of the more common problems. The wall feels like it is damp and starts to peel. So how to deal with alkali on the wall? Let's take a closer look!

What does wall alkali reaction mean?

When the temperature and humidity outside the wall change greatly, the water inside the wall will overflow the soluble alkali after being saturated, which is called alkali reversal.

The main manifestations of wall alkali are white frost or white crystals, blistering, cracking, peeling of the paint surface, etc. Living in a humid environment, you will often encounter such problems.

Alkali-resistant wall treatment method

The wall has a large area of ​​peeling phenomenon, which is quite serious. It is recommended to deal with it according to the following steps:

1. Scrape off the peeling area and the putty layer below, then use a shovel to knock and scrape off the wall base 10 cm outside the anti-alkali area. If there are loose and hollow areas, continue to scrape until the putty layer reaches a more solid area.

2. Use a steel brush to clean the base and remove dust.

3. Apply alkali-resistant sealing primer on the base layer.

4. Wait until the primer is completely dry before applying putty.

5. After the putty layer is dry, you can paint it.

Where is the wall alkali prone to occur?

Alkali on the wall is very annoying, not only affecting the appearance, but also seriously affecting the safety of the wall. So where in the home is the phenomenon of alkali easily occurring?

Water seepage in the exterior wall causes alkali backflow

If small cracks appear on the exterior wall, moisture will flow into the wall through the cracks. If the interior wall base is not waterproofed well, alkali backflow will easily occur.

Water pipe rupture causes alkali backflow

Many water pipes in the home are pre-buried in the walls, which are prone to aging over time. A tiny sand hole can cause the entire wall to become alkali-reflective and fall off. Therefore, when small alkali-reflective spots appear on the wall with pre-buried water pipes, they must be dealt with in a timely manner.

Toilet exterior wall anti-alkali

The bathroom is a place where water is frequently used. If the waterproof layer is not well done, water will flow into the wall and cause alkali reaction on the exterior wall. Therefore, waterproofing of the bathroom is very important.

Tips:

Most of the reasons for alkali backflow are improper treatment of the base layer or the materials do not meet the quality requirements, so you must be careful when purchasing materials to avoid choosing fakes. At the same time, when treating the base layer in the more humid areas of the home, you must apply a closed primer.