Renovation and painting skills of old and new wall

2022-07-22
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After a long time of use, the original white or bright wall at home began to become dim and aging. The renovation of the wall is not simply to repaint the original wall. What should be paid attention to in the renovation process? Now let's take a look at the wall renovation and painting skills

after a long time of use, the original white or bright wall at home began to become dim and aging. The wall renovation is not simply to repaint the original wall. What should be paid attention to in the renovation process? Now let's take a look at the wall renovation and painting skills

1. Basic treatment of old walls

basic treatment of old walls mainly refers to the removal of the original decoration and decoration of the wall

generally includes the removal of the original emulsion paint and putty layer on the wall, wood decoration, and the removal of other surface decorations (such as wallpaper). If the wall is decorated for only one or two years, the water-resistant putty of the wall does not need to be completely removed. After polishing the wall with a steel brush and sandpaper, the emulsion paint can be repainted. If the decoration takes a long time, the putty layer needs to be completely removed, and the putty should be applied again before other processes

2. Basic steps of wall renovation and painting

step 1: clean the wall surface

the old wall surface must be treated with the wall base before renovation, and those seriously powdered must be completely eradicated, and a layer of white cement should be plastered after eradication. The original wall surface is too smooth, and after the removal of the painted surface, it needs to be polished to remove the poorly bonded skin, so as to facilitate the bonding between the new paint and the wall

step 2: Brush primer

the function of wall primer is to resist alkali and moisture, seal the substrate, protect the finish, and improve the texture and hiding power of the finish. For the renovation of old houses, the walls must be primed. If they are directly painted without primer, the walls are easy to blister and mildew over time, and the color will change after a long time in the sun

step 3: large area repair

it will be troublesome to repair the wall with a good finish paint, which is easy to produce color difference, the use time of materials is different, and the quality is difficult to guarantee, so it is difficult to achieve the desired effect

therefore, the best way to repair the wall is to use the whole wall, or choose a larger area to repair as much as possible, so as to avoid color difference as much as possible, and the quality after repair is also better

step 4: prevent color difference

the color difference of the wall should be avoided when repairing the wall. For this reason, we should pay attention to mixing and brushing according to the instructions of the paint bucket, and it is best to estimate the dosage. Prepare enough quantity at a time, so as to ensure the consistency of the wall color and avoid the difference of the color redeployed due to insufficient quantity

3. Precautions for wall renovation and painting

due to the aging of materials, water-resistant putty with more than five years must be removed to the bottom of the wall during the secondary decoration, otherwise it will affect the construction quality of wall emulsion paint in the future and the long-term use effect after decoration

the ventilation condition of the old house is poor, and the xylene component in the diluent will react with the component in the emulsion paint, resulting in yellowing of the wall. So we should strengthen ventilation, open more doors and windows, or put a few electric fans to enhance the ventilation effect

in addition, while carrying out space transformation, we should understand the wall characteristics of the house. We must not damage the load-bearing wall in the decoration, and some non load-bearing walls cannot be demolished and modified at will, otherwise it will have a serious impact on the safety of the house

how to distinguish the bearing wall? Generally, it depends on the marks on the engineering drawing. The thick solid line in the construction drawing and the wall under the non bearing beam in the ring beam structure are load-bearing walls, while the non bearing walls are generally marked with thin solid lines or dotted lines on the drawing. In addition, it can also be distinguished according to the thickness of the wall. Generally, walls above 240mm are load-bearing walls

some walls cannot distinguish the thickness, but they are also load-bearing walls, such as external walls and walls shared with neighbors, which are easy to distinguish

the above tips on wall renovation and painting are briefly introduced here. I hope the above information will be helpful to you. If you still have anything unclear, please leave a message at the bottom of the page, and we will answer it for you as soon as possible. Thank you for your support, and relevant articles will be published later. Please continue to pay attention

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