We will not forget to decorate the exterior wall when decorating the house. When buying exterior paint, we need to find materials that are resistant to the sun and moisture. There is also a need for certain skills during construction. However, many people don't know how to do it when they are painting. So, do you know the construction plan of the exterior wall coating? Today, the decoration house decoration network Xiaobian will take a look at the exterior wall coating construction plan and the exterior wall coating construction points!
Exterior wall coating construction plan
1. Construction of thin layer exterior wall coating
Thin-layer exterior wall coatings are very suitable for fine-pile wall coatings, usually with one-time primer coating and two-pass coating. Of course, according to the engineering quality requirements of the exterior wall coating construction plan, the number of surface coatings can be appropriately increased.
The role of the primer: to close the alkali of the wall surface, improve the adhesion of the surface coating and the wall surface, avoid the large amount of absorption of the coating due to the excessive drying of the wall, and ensure that the amount of suction is equivalent, and increase the strength of the underlying material. However, the role of the primer is limited. Although the primer is used, the pH and moisture content of the bottom layer must be met before the construction can be completed.
Construction method: roll coating, brush coating, air spray and airless spray can be used.
2, the construction of multi-layer coating
The construction of the multi-layer coating is actually very simple, and it does not need to find the flatness of the bottom layer. It is generally used for rough-drawing the wall surface, and can be applied after repairing the polymer cement putty with obvious defects such as missing corners and corners.
Construction of the primary coating: The primary coating is also called aggregate. If it is a reaction-curing type, it should not be used as long as it is used, and the ingredients should be handled by a special person to ensure accurate ingredients. Main coating coatings are generally mechanically sprayed during construction, so
The test spray should be carried out before construction, and the paint stiffness, the type of spray gun, the diameter of the nozzle, the pressure of the muzzle, the distance and angle of the spray gun from the wall should be adjusted appropriately. The sample should be sprayed first, and the large area can be constructed after passing the inspection.
Overcoat: Apply 2 coats on the surface of the main coat. Choose a solvent-based exterior paint or synthetic resin emulsion paint for exterior paint. The construction of the overcoat is the same as that of the thin exterior coating.
3. Construction of colored sand wall exterior wall coating
Colored sand wall exterior paints used to be the decorative coatings used in the outer walls of most residential quarters. Due to poor stain resistance, they have been limited in recent years. Based on this, two new exterior wall decorative coatings, pearl paint and real stone paint, were developed.
When spraying, the intermediate paint is generally dense and sparsely side by side, so about 1/3 of each row should be repeatedly run. The running speed of the spray gun should be kept even. If the operation is too fast, the coating film is relatively thin, and there will be problems of uneven color and poor hiding power. If the operation is too slow, the local paint will be too thick or even sag. Real stone paint can be sprayed twice according to the needs of the decorative effect.
Overcoat: The surface of the pearl paint should be covered with high-grade exterior paint. The color can be white or colored. The color should not be too deep or too light, because if it is too deep, it will not be like pearl color, but if it is too light, it will fade faster. The finish should have a certain sheen. For real stone paint finishes, two-component reaction-curing finishes such as epoxy-acrylic varnish or polyurethane-acrylic varnish should be used to improve the stain resistance of the final coating, while the ordinary thermoplastic acrylic varnish is resistant to staining. Poor sex.
Main points of exterior wall coating construction
Do the bottom layer processing
Dealing with the bottom layer is equivalent to laying the foundation of the wall. This link is very important. When carrying out the construction, it is necessary to eradicate the dust and other adhering substances on the bottom surface; the larger depressions should be smoothed with polymer cement mortar, and it is necessary to check whether there are smaller holes and cracks after the cement is dried. If it is, it should be repaired with cement latex putty in time; if it is wall-based alkali-based frosting, it should be brushed with zinc sulfate solution or dilute hydrochloric acid solution, oil stained with detergent, and finally washed with water; other coated The old coating on the bottom layer for looseness, shelling, and brittleness should be eradicated, the old coating with strong adhesion should be sanded with sandpaper, and the water-resistant coating should be completely eliminated.
Bottom bottom
If the wall surface is loose and absorbent, you can use the roller to evenly paint one or two times on the cleaned bottom layer (acrylic emulsion or water-soluble building glue plus 3 to 5 times water to dilute Serve). Leakage, too much can not be painted to cause flow or accumulation. Then use the adjusted putty to find the uneven place. According to the bottom condition and decoration request, apply 2~3 times of putty. The putty should not be too thick. After the putty is dry, it should be sanded in time, and the wave shape should not be ground. Leave scratch marks and sweep off the ash after polishing.
Brush the paint
When the paint is divided into the bottom coating and the top coating, the primer should be evenly mixed first. If the coating is thick, it can be diluted according to the requirements of the product manual. Brush it evenly with a roller brush or a row of brushes. Be careful not to miss the brush, or brush it too thick. After the primer is dry, if necessary, partially fill the putty, dry and smooth.
The above is the outer wall coating construction plan and the exterior wall coating construction point that Xiaobian introduced for you to this end. The exterior wall coating project can enhance the house's water and sun resistance, maintain the decoration and extend the service life. For more information, please stay tuned to the renovation home.
More related wonderful reading:
Exterior wall paint renovation construction plan
How to clean the exterior paint? External wall coating construction precautions
Completion standards for exterior wall coating construction before exterior wall coating construction
Exterior wall coating construction process exterior wall coating construction process
How to apply exterior paint? The most detailed exterior coating construction steps
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