How to paint the old wall when renovating the old

2022-07-22
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After years of use, the walls often fall off or dirt, making the whole space inevitably look a little old. At this time, friends who encounter this situation will want to paint the wall by themselves, which can not only save money, but also enjoy the fun of doing it by themselves. Painting walls looks simple, but it requires a certain skill. So, how to paint the old wall? Don't worry, today Xiaobian is here to tell you a few steps of old wall painting, hoping to help you

after years of use, the walls often fall off or dirt, making the whole space inevitably look a little old. At this time, friends who encounter this situation will want to paint the wall by themselves, which can not only save money, but also enjoy the fun of doing it by themselves. Painting walls looks simple, but it requires a certain skill. So, how to paint the old wall? Don't worry, today Xiaobian is here to tell you a few steps of old wall painting, hoping to help you

how to paint old walls

tools/raw materials:

latex paint, putty, interface agent, kraft paper, white latex, bucket, roller brush, board brush, shovel, scraper, sandpaper, long stick

steps/METHODS:

1. First wet the wall to save effort when shoveling. Remove the parts of the original wall that have been soaked by water until the cement mortar wall putty layer is exposed

2. The wall surface shall be painted with interfacial agent, which must be painted evenly

3. Generally, use kraft paper tape and white latex to stick the cracks (but it can't be guaranteed that 100% won't crack again)

4. Uneven walls need to be leveled. Generally, gypsum is commonly used, and the concave convex difference is not more than 0.5 cm

5. Generally, non load-bearing walls such as light body walls and thermal insulation walls need to be pasted. Try to choose wall cloths and white latex with better texture. If conditions permit, you can use mesh cloth, which will have a better crack prevention effect

6. Putty with high particle fineness and hard texture is preferred. A certain amount of white emulsion can also be added to the putty to improve the hardness of the putty. Use fine sandpaper. Generally, 400-500 sandpaper is used for putty with soft texture (such as 821), and 360-400 sandpaper is better for putty with hard texture (such as wall lining and easy to flatten). If the sandpaper is too thick, it will leave deep sand marks, which cannot be covered by painting. After polishing, the wall must be thoroughly cleaned to prevent too much dust from affecting the adhesion of the paint. The concave convex difference shall not exceed 3mm

7. The primer must be brushed evenly to ensure that every part of the wall is brushed. If the wall has a large amount of paint, it is best to add a little more water to the primer to ensure that it can be brushed evenly. Don't think it's OK to use a poor roller just because it's a primer. The brushing effect of the primer will directly affect the effect of the topcoat. Use a roller with the same texture as the topcoat

8. After the putty is polished, there will be some defects (pit holes), which are generally difficult to see. It will be obvious only after painting once. At this time, it needs to be repaired. Note that the repair must be polished smoothly, and then brush it once with a little more water primer, so as to avoid color difference due to the different water consumption of the top coat and other walls

9. Don't add too much water, which will affect the thickness, feel and hardness of the paint film. Try to choose a better tool. The hair of the roller should not be too short, but it must be fine, so that the paint film will feel fine. When painting, pay attention to the corner, the connecting part in the middle of each roll, the direction of paint collection, and the treatment of the corner. In most cases, brush with a pencil or a board brush, which will easily cause the corner texture to be inconsistent with the whole surface, There will be visual differences. If possible, you can buy a trimming roller. After the corners are painted with a board brush, you can use the trimming roller again. Note that the material of the trimming roller should be the same as that of the roller on the large surface. When painting the large surface, the paint at the joint of each roll must be evenly collected, and it should not be too thick or too thin, otherwise the reflection will be inconsistent due to uneven thickness. When painting, there will be a painting action after each roll on the wall, This requires that the direction of each roll should be consistent, otherwise the texture of each roll will be inconsistent, the reflective angle will be different, and there will be visual differences

10. Maintenance: the emulsion paint will dry 4 hours after brushing, but the dry paint film has not reached a certain hardness, so it needs care. It is very simple. Do not scrub or touch the wall within 7-10 days

the above brief introduction about how to paint the old wall is here. I hope it will be helpful to you. Please look forward to more information

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