Construction steps and matters needing attention of exterior wall coating

Decoration is to create a comfortable living environment for yourself. Of course, the decoration is nothing more than making the home warmer. Therefore, everyone will choose some decorative materials to dress up in the process of family decoration, among which exterior wall paint is one of the commonly used decorative materials. Let's take a look at the construction steps and precautions of exterior wall coating.

Construction Steps of Exterior Wall Coatings

1, base treatment: first, remove the dust and other attachments on the surface of the base. Large 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. Brush the wall with zinc sulfate solution or dilute hydrochloric acid solution, wash off the oil stain with detergent, and finally wash it with clear water. The original coating of the base should be treated differently according to different situations: the loose, shelled and fragile old coating should be removed; Polishing the firmly adhered old coating; Waterproof coating should be completely removed.

2. Priming glue (except wood and painted surface): If the wall is loose and has strong water absorption, you can brush the glue evenly once or twice on the cleaned base (acrylic emulsion or water-soluble building glue is diluted with 3 ~ 5 times of water).

Don't miss painting, and don't brush too much to cause flowing or accumulation. 3. Partial putty filling: After the base is dried, fill the unevenness with putty and sand it after drying. The finished putty should be stirred evenly before use. When the putty is thick, it can be adjusted with water.

4. Fully scrape putty: put putty on the tray,

Scrape with a trowel or leather scraper, first up and then down. Blow putty 2 ~ 3 times according to the basic situation and decoration requirements, and the putty should not be too thick each time. After the putty is dry, it should be polished with sandpaper in time, and it is not allowed to grind out waves or leave grinding marks. After polishing, floating ash should be swept away. 5. Primer: Mix the primer evenly. If the paint is thick, it can be diluted according to the requirements of the product manual. Brush evenly with roller brush or row brush, and be careful not to miss the brush or brush it too thick. After the primer is dried, putty can be partially supplemented when necessary, and the sand is smooth after drying.

6. Brush the surface coating: dilute the surface coating according to the proportion required in the product manual and stir evenly. When the wall needs color separation, use chalk line or Amodou to pop up the color separation line, and leave 1 ~ 2 cm space at the intersection of colors when painting. First, one person dips the paint with a roller brush and spreads it evenly, and then the other person uses a combination brush to smooth and splash the paint marks.

Bottoming and sagging should be prevented. Each painting surface should be painted from the edge to the other side, and it should be completed at one time to avoid seam marks. After the first drying, paint the second time. Generally, it should be brushed for 2 ~ 3 times, depending on different situations. Matters needing attention in the construction of exterior wall coatings

1, the weather is hot in summer, and two hours before putty construction, the wall should be wetted with clear water. After each batch of putty is scraped dry,

Need to be cured with clear water. 2. Primer and topcoat should be mixed evenly before use. If mixing is carried out indoors or on the roof, plastic sheets or newspapers should be placed under the bucket to ensure that the ground is clean and tidy. Before using the materials, the container cover must be cleaned to prevent impurities from mixing.

3. Clean the construction instruments to avoid impurities. After completion, the instrument should be cleaned in time. Construction personnel should be equipped with protective masks when spraying.

4. All materials are composed of two components, and the proportional values must be accurately separated by platform scales or measuring tools according to the instructions to prevent quality problems due to improper proportions.

5, scaffolding, hanging basket and the ground distance should be appropriate, the standard distance is 40-50cm. If you get too close, the scaffold will be unevenly stressed; On the other hand, if it is too far away, the painting skills will not be implemented as expected.

6. Protection work. Stick the protective sticker as straight and tight as possible. If it is applied to the part that should not be applied, wipe it off immediately.

7, before the formal construction, be sure to try painting on other plates, and then enter the formal painting after confirming the painting effect.

8, correctly separate the interval between each process, otherwise it will cause the coating adhesion is not strong or peeling, uplift, peeling.

9, process handover and remove the rack or mobile hanging basket must carefully check each part, must be repaired when necessary.