What are the practices of exterior wall coatings and how to use exterior wall coatings

The exterior wall paint practices are as follows:

1. The treatment of the bottom surface of the exterior wall foundation can be cleaning, leveling, and special closed exterior wall paint primer, or 108 glue.

2. Exterior wall putty, generally up to two times. Black cement glue, or special putty for exterior walls. The batch scraping is smooth, and the individual requirements can also be polished.

3. Painting: more spraying, strong technicality, and fast construction speed; Less brushing, repairing convex and concave corners brushing.

Exterior wall coating construction points:

1. The construction of exterior wall coating is a high-altitude operation, and the construction safety must be ensured: all types of work and operations must have a high safety precaution process to ensure it: scaffolding workers, winch machinery, handling, putty, spraying, repairing, on-site management, and must do a good job in various high-altitude work protection measures, and organize safety education and training for safe construction.

2. The influence of the construction season and time period and weather temperature: the construction of exterior wall coatings is susceptible to the influence of the weather. On rainy and windy days, construction may be stopped in the middle of the construction, which will have various possible impacts on the quality and duration of the construction semi-finished or finished products.

3. Shielding and protective measures for construction: The surface and protective package of adjacent buildings and equipment and facilities on the construction surface of the exterior wall spraying project should be done in advance. Spraying and brushing are easy to drip, construction liquid garbage is easy to flow and pollute, and exterior wall latex paint is generally not easy to clean, so it is necessary to do a good job of protection and shielding.

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Construction operation methods.

a.Grassroots treatment.

First, remove dirt and other adhesions from the surface of the base layer. Larger depressions should be smoothed with polymer cement mortar. And wait for it to dry, and the smaller holes and cracks are repaired with cement latex putty.

When the wall is covered with alkali and frost, it is brushed with zinc sulfate solution or dilute hydrochloric acid solution, and the oil stain is cleaned with detergent, and finally washed with water.

The original coating of the base layer should be treated differently according to different situations: the old coating that is loose, shelling and brittle should be removed; The old coating with strong adhesion is fluffed with sandpaper; Coatings that are not resistant to water should be removed completely.

b.Brush primer (except wood and painted surfaces).

If the wall is loose and absorbent, you can evenly brush one or two times of glue primer with a roller on the cleaned base layer (acrylic emulsion or water-soluble building glue is diluted with 3 or 5 times water), and it can not be omitted, nor can it be painted too much to cause flow or accumulation.

c.Spot putty.

After the base is dried, use putty to make up for the unevenness, and then sand it will be flattened after drying. The finished putty should be stirred well before use, and the putty can be adjusted with water when it is thicker.

d.Full scraping putty.

Place the putty on the pallet and scrape it with a trowel or a leather-like scraper, first up and then down. According to the situation of the base layer and the requirements of decoration, scrape and apply 2 or 3 times of putty, and each putty should not be too thick. After the putty dries, it should be sanded with sandpaper in time, and it should not be wulled out of wavy shapes, nor can it leave grinding marks, and the floating ash should be swept away after polishing.

e.Brush primer.

Stir the primer evenly, if the paint is thicker, it can be diluted according to the requirements of the product manual. Brush evenly with a roller brush or row brush, taking care not to miss the brush or brush too thickly. After the primer dries, if necessary, the putty can be partially repaired, and the sanding is smoothed after drying.

f.Brush coating.

Dilute the topcoat in the ratio required by the product manual and stir well. When the wall needs to be separated, first use a pink line bag or ink fountain to pop out the color separation line, and leave 1 2cm of room in the intercolored part when painting. One person first uses a roller brush dipped in the paint to evenly coat it, and the other person then uses a row of brushes to flatten the marks and splashes.

Bottom-penetrating and falling should be prevented. Each surface should be applied from the edge to the other and should be done in one go to avoid seams. After the first coat is dry, apply a second coat of paint.

Generally, apply 2 to 3 coats of paint, depending on the situation.

1. Check whether the flatness of the main wall and the lines are straight and clear, and require the surface of the base layer to be smooth and dry (the cement mortar surface should be maintained for more than 15 days), without floating ash, asphalt and other stains, and pH 10 and moisture content 10. The old cement surface should be shoveled to remove the floating layer to ensure that the base is firm, remove the impurities on the wall, repair the porous and rough base, and then use a grinding wheel to smooth it.

2. According to the requirements of decoration, use cement mortar or tape paper to divide the base surface into the required graphics (each dividing surface is not more than 1 5m2). Bottom coating construction and neutralization treatment: neutralize the alkaline wall with a special neutralizer to ensure that the wall surface after construction is not alkaline, and the dosage is about 0 1 0 2kg m2.

Primer construction: Rinse the neutralized wall with clean water, and after the wall is dry, the primer construction is carried out, and the primer dosage is 0 15 0 20kg m2. The undercoat can be applied by brush, roller or spray.

3. Main coating (real stone paint) construction: after the bottom coating is completely dry (generally 4 6), the construction can be carried out, according to different decoration requirements, the test spraying is carried out first to determine the pressure required for construction, the caliber of the spray gun and the amount of spraying, generally 5kg m2. Monochrome main coating:

It is advisable to spray it in two parts. Before the coating film dries, the second coat can be sprayed. Chromatic main coating:

You can choose to spray in batches with a double-tube real stone paint spray gun or a single-tube real stone paint spray gun.

4. Auxiliary treatment: remove the dividing tape and carry out hook treatment according to the needs of decoration. Overlay layer (overlay paint) construction:

After the main coating is completely dry (generally about 48) can be applied, it can be brushed or rolled, and the amount of overprint paint is 0 15 0 20kg m2.

Many decoration whether it is a building or a bungalow, will use this exterior wall coating, then the role of exterior wall paint friends know, but when we use the open file lack of it, how to do the exterior wall paint construction, and there are not many precautions for exterior wall coating, and then I will introduce it to friendsExterior wall paint constructionWhat are the tips and precautions during construction.

1. What are the construction skills of exterior wall coatings?

1. The construction of exterior wall paint is actually very simple, in fact, we do not need to seek the flatness of the bottom layer, it is generally used for rough brushed walls, and the application of polymer cement putty can be painted after the application of obvious defects such as missing edges and corners.

2. When the exterior wall coating is used, the main coating is also called aggregate. If it belongs to the reaction curing type, it should be used with the mixture, not for a long time, and the ingredients should be responsible for a special person to ensure the accuracy of the ingredients. The main coating coating is generally sprayed mechanically during construction, so a test spray should be carried out before construction.

3. At the same time, the strength of the paint, the type of spray gun, the diameter of the nozzle, the air pressure of the muzzle, the distance and angle between the spray gun and the wall should be appropriately adjusted. The sample should be sprayed first, and the large-scale construction can only be carried out after passing the inspection.

4. And the surface of the main coating is generally covered with 2 surface coatings, and solvent-based exterior wall coatings or synthetic resin emulsion exterior wall coatings can be used for stupid rolling surface coatings. The application of overlay coating is the same as that of thin layer of exterior paint.

Second, what are the precautions for the construction of exterior wall coatings.

1. After the paint is opened, it is fully stirred evenly, such as the axial degree is too large, and the construction performance can be adjusted according to the instructions by adding thinner (latex paint is generally added with water), pay attention to the requirements, especially the latex paint can not add excessive water, otherwise the water will make it difficult to form a film after drying and reduce the gloss, durability and hiding power of the coating.

2. The temperature and humidity will be affected, among which latex paint has the highest requirements for construction temperature, and if it is lower than a certain temperature for construction, it will lead to poor film formation. There is also a misunderstanding here: some users think that the temperature of high-grade latex paint can be lower during construction.

3. In fact, this is just the opposite, because the medium and high-grade latex paint is generally prepared with an emulsion with a high glass transition temperature, and the proportion of the emulsion is higher, so even if a large number of film-forming additives are added, a higher film-forming temperature is required, that is, the construction temperature.

4. Also, in some areas in the south of our country, humidity often affects the quality of construction, especially for solvent-based exterior wall coatings, generally do not construct when the humidity is greater than 85%, because the humidity is too high, the coating film dries very slowly, which not only affects the adhesion of the coating to the wall, but also makes the wall bloom.

The content of the above article is our introduction to the skills of this exterior wall coating construction, what are the precautions when the exterior wall paint construction, friends and other decoration information they want to know, continue to ****, learn more about decoration.