It is recommended to whiten or paint ceilings only.after the old finish is removed. However, the case is quite complicated. To clean old chalk or lime from the ceiling is long and tedious. In addition, the dirt after that in the house remains a lot. Earlier glue was added to the chalk solution before whitewashing. If the surface is finished with just such a means, its cleaning will turn into a torment. Therefore, surely many owners of houses and apartments would like to know whether whitewash on the ceiling is possible on the old whitewash, and how to properly perform such an operation.
What you need to know about
In principle, to paint or whiten ceilings, notremoving the old coating is possible. But not in all cases. So, for example, whitewashing the ceiling on the old whitewash with chalk is highly undesirable if it is covered with lime (and accordingly vice versa). Otherwise, sloppy stains will surely appear on the ceiling. If you do not want to scrape off the old coating, you should whiten the ceiling with the tool that was used before. It is also not necessary to apply lime or chalk in the event that the surface was previously treated with water-based paint. The surface is simply not space. The ceiling will remain yellow, how many layers would not be applied.
Paint use - is it possible?
Many owners of houses and apartments are setincluding the question of whether it is possible to whiten the ceiling on the old whitewash water emulsion. It is believed that the use of this tool is valid. But only if the layer of the old finish is not too thick and holds on to the ceiling tightly enough. In no case should oil paint or enamel be used on whitewashing. When using them, the old coating will have to be removed.
Preparation for finishing
In the event that you decide to perform suchoperation, like whitewashing the ceiling on the old whitewash, before starting treatment you have to carefully prepare the old surface. Chalk on a layer of plaster usually lies flat. Lime can depart pieces. Therefore, in the latter case, before whitewashing you need to check the entire ceiling for the presence of such detachments. Of course, all the detached pieces should be removed with a spatula. After performing this operation on the ceiling, of course, there will be irregularities. They need to be sealed with a special chalky putty or thick lime mortar with the addition of a small amount of PVA glue (depending on the type of the old finish). Of course, you need to miss the mark and all cracks and chips on the surface.
Before proceeding to leveling the ceiling, itsit is advisable to go through with a damp cloth in order to remove dust, spider webs, etc. It often happens that the old chalk or lime coating has a yellow color. After applying a new finish, this yellowness, most likely, will still shine through. Therefore, before beginning work, this color-changing surface should be bleached. Such a need, for example, will necessarily arise when finishing the kitchen. Yellow ceilings are in the event that someone from the owners smokes right in the apartment. To whiten such a surface is easy. It is enough just to add a little inexpensive “Whiteness” to the water in which the rag is dipped during cleaning. If the ceilings are very yellow, they should be passed with a roller moistened in the prepared solution. Next, wait until the surface is dry.
Whitewashing the ceiling on the old whitewashing: technology
Chalk and lime are usually not very good.adhesion to concrete. Therefore, the ceiling, previously trimmed with such a tool, should be processed using not a roller, but a spray gun. In this case, the surface will be smooth and neat. The roller is also allowed. But when using this tool while doing work, you will have to carefully monitor that there are no streaks on the surface. Of course, to whiten the ceilings on the old lime or chalky layers you need not one, but at least two or three layers.
Water emulsion use
Asking how to whiten the ceiling byold whitewash should, of course, be determined, including the type of finish used. Chalk and lime in the design of poltolkov today used extremely rarely. In most cases, the owners of apartments and houses use water-based paint. This tool is applied to the surface of the ceiling much smoother. In addition, the water emulsion does not peel off over time. But of course, such a finish will last a long time only if it is correctly applied.
Before painting with water-based paint,bleached ceiling is primed. It should use a special means of deep penetration. After the primer dries, you need to test the old coating for strength. To do this, simply try to scratch the ceiling with a spatula. If the old coating is easily removed - it is better not to risk it and still remove it. If the chalk or lime soaked in the primer is held firmly, you can start painting.
Sometimes the owners of apartments and houses trimwhitewashed ceilings with water-based and without pre-priming. This is also permissible. But only if a very high quality paint from a good manufacturer is used.
Basic rules whitewash
Конечно же, перед началом выполнения такой operations like whitewashing the ceiling on the old whitewash, the room must be prepared Floors and furniture should be covered with technical plastic wrap. Wear rubber gloves on your hands. This is especially important if slaked lime is used for processing. As you know, it can corrode the skin.
Before starting whitewashing of the ceilings with a water-based emulsion, lime or chalk, all doors and windows must be closed. Otherwise, on the ceiling after drying, there will be ugly stains and stripes.
The use of special tools
The spray bar gives a very thin finish.Therefore, whitewashing the ceiling on the old whitewash with aqueous emulsion paint when using this tool should be made at least in three layers. It allows to receive an equal, absolutely white and pure surface. Before applying each subsequent layer it is necessary to wait until the previous one dries completely. This rule, by the way, is observed both when using the spray gun and roller.
Should I trim without pre-cleaning?
So, we found out - is it possible to whiten the ceiling onold whitewash. In principle, it is allowed to do this. If all of the above recommendations are observed, the owner of an apartment or house can eventually get a fairly even and beautiful coverage. However, unfortunately, it will be necessary to correct this finish later than if the ceiling had been previously cleaned.
Therefore, before making a decision on whitewashingwithout removing the old layer, it is worthwhile to think carefully. Lime holds on the ceiling pretty tight. Therefore, if the surface is finished just for her, applying a new layer without removing the old ones still has some meaning. But the chalk is removed from the ceiling is very easy - just with the help of a rag and water. Therefore, in this case it is more expedient to pre-clean the surface.
