Wall construction | how to brush emulsion paint on the old wall? Difference between grasping and painting new wall

Core tip: compared with the new wall, the old wall renovation will be more troublesome Therefore, the old wall painting latex paint is also more trouble, need to pay attention to many problems How to brush emulsion paint on the old wall? Of course, you have to clean the wall first Let's study together Owner's consultation: can the old wall be directly painted with latex paint? We answer this way - if the original wall is latex paint, and the foundation strength is good, it can be directly painted with latex paint after simple roughening and repair However, it should be noted that the integrity of the original wall paint film should not be damaged, and the latex paint with better adhesion than the original wall latex paint should not be used, or it is easy to peel and fall off If the original wall is scraped Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: compared with the new wall, the old wall renovation will be more troublesome Therefore, the old wall painting latex paint is also more trouble, need to pay attention to many problems How to brush emulsion paint on the old wall? Of course, you have to clean the wall first Let's study together Owner's consultation: can the old wall be directly painted with latex paint? We answer this way - if the original wall is latex paint, and the foundation strength is good, it can be directly painted with latex paint after simple roughening and repair However, it should be noted that the integrity of the original wall paint film should not be damaged, and the latex paint with better adhesion than the original wall latex paint should not be used, or it is easy to peel and fall off If the original wall was scratched, it would have to be removed and redone In fact, it only needs to follow the principle that the paint of the same nature can be renovated, otherwise it will not work; and if the original wall paint has been damaged, it cannot be painted with emulsion paint In addition, if economic conditions permit, the old wall can be repainted, and the quality of the wall is not good, then the best suggestion is to do it again How to brush emulsion paint on the old wall? There are seven steps as follows: the first step: keep the wall flat and renovate the old wall of the old house The wall often has peeling, bulge or crack problems You can use a steel brush or blade to roughly level the wall and clean it In order to make the cement wall surface free of floating soil and heaviness, the new brush of emulsion paint can also be more firmly bonded with the wall surface In addition, the peeling primer on the wall should be cleaned up If the old wall has been pasted with old wallpaper, there will be residual adhesive paper after tearing off, it needs to be cleaned up In theory, the standard of wall flatness error is about 3mm Step 2: the purpose of puttying is to repair the wall to ensure that the wall is solid and flat After that, roll the concrete interface agent on the wall again to achieve even effect When the concrete is dry, it can be puttied Generally, the putty on both sides shall be scraped and leveled After the two sides are scraped and dried, they shall be ground and polished with fine sand There shall be no omission and the scraped putty shall not be worn through The uneven position of the base course surface shall be removed by repairing to make the wall smooth and flat Step 3: it is recommended to use fine sandpaper for grinding Generally, the soft putty (such as 821) is used with 400-500 sandpaper, while the hard one is preferred with 360-400 sandpaper If the selected sandpaper is thick, it will leave deep sand marks on the wall, even if it is painted, it cannot be covered After polishing, clean the wall thoroughly to avoid too much dust affecting the adhesion of the wall paint In general, the concave convex difference is ≤ 3mm Step 4: the primer must be evenly applied to ensure that any position of the wall can be brushed If the amount of paint on the wall is large, the primer can be properly added with more water to make the painting more uniform Do not think that it is the primer that can use the poor roller, because the brushing effect of the primer will directly affect the effect of the top coat, so it is better to choose the roller with the same texture as the top coat Step 5: after polishing the putty, there will be some defects, i.e some holes It's hard to see clearly, but it will be much more obvious after painting once, so it needs to be mended at this time Repair, pay attention to grinding and leveling, and then brush the primer with a little more water to avoid color difference due to different water consumption with other walls when painting the top coat Step 6: this process of finishing coat is the common painting work, without adding too much water, otherwise it will affect the thickness, feel and hardness of the paint film It is recommended to select some tools The hair of the roller should not be too short, but it should be fine, and the paint film will have a delicate feel When painting, pay attention to the corner of the wall, the joints in the middle of each roll and the direction of paint collection Step 7: generally, the emulsion paint will dry after 4 hours, but the film has not reached a certain hardness at this time At this time, some nursing work needs to be done It is not allowed to scrub or touch the wall within 7-10 days How to paint emulsion paint on the old wall? In fact, there is not much difference between the old wall and the new wall, but the differences need to be paid great attention to, because carelessness may cause great problems and fail Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,