andling walls before painting as many customer inquiries as to the CMC Paint because most people have encountered problems in the construction process leading to construction quality is not like that. In this article, CMC and Paint will answer your guide to the most common situations and how to handle each case.

Question 1: My house walls are lime, all I want to paint, how do I do?

Paint CMC answer:

For this type of wall is being painted and intend to switch to water-based paint is the only method of removing this layer of limestone walls go, let go by using wire brush or alder tree, next to the conducting surface cleaning wall, then paint powder baits.

This work should be conducted carefully and thoroughly because if the class is still the lime paint, new paint may be peeling because lime layer underneath poor adhesion.

Question 2: I want to paint the house, the old paint still, I need to let go of it?

Paint CMC answer:

In case you have two ways of handling as follows, if the old paint is still good adhesion, then just wipe away dirt and paint one primer and two finishing coats. If the old paint is peeling, no adhesion, the detachment conducted by wire brush or alder tree, then clean the surface and dough baits, alkali resistant primer and paint finish.

Can inspect the adhesion of the old paint as follows : Use paper tape 1 cm wide to a wall and then a 20cm peeled off . If the old paint is peeling off the adhesive is not much better . If the old paint is not flaking or peeling at the good adhesion , can be applied without having to let go of the old paint .

Question 3 : For new plaster surface , I have to handle how old wall before the new paint ?

For new plaster surface , you should only proceed when the painting surface mortar has achieved the necessary dry , humidity below 16 % . Specifically, the wall was from 3-4 weeks to dry in normal conditions , no rain . Then you follow the system construction : 2 + 1 layer of plaster primer and two coats of paint .

As for the wall surfaces have used stickers . After stripping wallpaper , wall surface must be thoroughly handled stains , old glue on the old surface with a solvent or sandpaper . If the surface to fill the hole left by plaster skim coat to dry . Drain sanding , paint and clean sanitation system 1 under alkaline resistant primer and two coats of paint .

Question 4 : Before you paint , the wall should be what factors ?

Before painting , the wall should ensure the following two factors : CLEAN and DRY .

Clean surface is no longer surface dirt , grease , moss , pollen … or any other factors that reduce the adhesion of the coating .

Relative humidity below 16% to be achieved when measured by Protimeter moisture meter suitable for new construction. If there is no meter, dry wall should wait 3-4 weeks from the lake after bowl of dry weather conditions.

Above is the answer to the common case, to obtain detailed advice and more accurate for other cases that you encounter, do not hesitate to contact CMC Paint, we are happy to serve your service.