How to paint the wall for second-hand house renovation?
Many people ask whether the old wall reconstruction can be painted directly? What are the specific construction steps? Now the editor will give you a detailed introduction ~
Renovation of old walls is a relatively strenuous task. The old walls will have one or other problems. Therefore, the walls must be cleaned before the old walls are renovated to repair some original wall problems.
Can the old wall be painted directly
If the original wall is latex paint, and the foundation strength is good, you can paint directly after simple roughening and repair, but be careful not to damage the integrity of the original wall paint film, and do not use much better adhesion than the original wall latex paint Latex paint, otherwise it will easily peel off; if the original wall is scraped porcelain, it must be produced and reworked. In fact, as long as there is a principle in this regard, that is, the same nature can be renovated, otherwise it must be repeated; if the original wall is If the paint is not good enough, brushing the latex paint will soak the previous latex paint. The best way is to brush 801 glue and scrape the putty again, then brush the latex paint. In addition, if economic conditions allow, and you are not satisfied with the quality of the original wall, it is recommended to redo it. Because the treatment of the wall surface is the dirtiest part of the entire decoration process, don't try to save trouble, otherwise it will be very troublesome in the future.
Old wall reconstruction steps:
1. Clean the old wall surface: General old wall surface will have problems such as oil stains, ash float, hollow drums or cracks, low water absorption, etc., then you need to do some cleaning work on the wall surface. For the old wall surface, remove the floating ash and remove the sand and peeling parts; for the oil stained parts, the original coating should be shoveled away, and if it cannot be shoveled, it should be thoroughly cleaned; after the wall surface is cleaned, scrape two with putty Road.
2. Scrape putty: It is better to use putty with higher particle fineness and harder texture. You can also add a certain amount of white latex to the putty to increase the hardness of the putty.
3. Sanding: use finer sandpaper as much as possible. Generally, the softer putty (such as 821) uses 400-500 sandpaper, and the harder texture (such as wall lining, easy to flat) 360-400 is better. If the sandpaper is too thick, it will leave a deep sand mark, and the paint cannot cover it. After polishing, be sure to clean the wall thoroughly to avoid too much dust and affect the adhesion of the paint. The difference between unevenness is not more than 3 mm.
4. Primer: The primer must be applied evenly to ensure that the wall is brushed everywhere. 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 evenly applied. Don't think it's enough to use a poor roller 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.
5. Tonic: After the putty is polished, there will be some defects (pit eyes), which is difficult to see under normal circumstances. It will be obvious only after the paint is applied once. At this time, it is necessary to find the tonic, pay attention to the tonic must be polished and smooth Use a primer with a little more water to avoid the color difference due to the different draughts of the other walls.
6. Topcoat: The paint suitable here is the ordinary paintwork. Do not add too much water, it will affect the thickness, feel and hardness of the paint film. Try to choose a better tool, the roller hair should not be too much Short, but it must be fine, so that the paint film brushed out will feel delicate. The main focus of the brushing is the corner of the wall, the indirect stubble during each roll, and the direction of paint collection.
7. Maintenance: The emulsion paint will dry after 4 hours, but the dried paint film has not reached a certain hardness. This requires care. It is very simple. Do not scrub or touch the wall within 7-10 days. Face action.
Notes on wall reconstruction:
1. If the original is imitation porcelain paint, scrape the putty again after removing the paint film. The latex paint products applied directly on it are prone to falling off.
2. It is necessary to pay attention to evenly grind the putty on the old paint film, otherwise the paint film will bloom after construction due to the different absorption of the substrate.
3. Re-coat on the old latex paint film again, it is necessary to deal with cracks and warping. For hair-like cracks, directly use elastic products to cover fine cracks. For larger cracks, it is recommended to fill and smooth with primer mixed powder And after polishing evenly, the construction is low and the topcoat.
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