How to construct exterior wall coating?

Exterior wall paint is like a coat on a building. Whether it is beautiful or waterproof, it should be the best, so the construction of exterior wall coatings should not be sloppy. So how to construct the exterior wall coating? Next, I will bring you the most detailed construction steps and precautions for your reference.

How to construct exterior wall coating?

Construction steps of exterior wall coating 1, base treatment: firstly, remove dust and other attachments on the surface of 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 layer should be treated differently according to different situations, and the loose, shelled and fragile old coating should be carved from the root; Polishing the firmly adhered old coating; All waterproof coatings shall be removed.

Construction step 2 of exterior wall coating. Primer painting (except wood and paint): If the wall is loose and absorbent, you can brush the glue evenly on the cleaned base once or twice (acrylic emulsion or water-soluble building glue is diluted with 3 ~ 5 times of water), and you can't miss painting or brush too much to cause flowing or accumulation.

Construction step 3 of exterior wall coating. Partial putty filling: after the bottom layer 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.

The fourth step of exterior wall coating construction, full scraping putty: put the putty on the tray and scrape it 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.

Construction step 5 of exterior wall coating. Primer: Mix the primer evenly. If the coating 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.

The sixth step of exterior wall coating construction, surface coating: the surface coating is diluted according to the proportion required in the product manual and stirred 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, paint should be brushed 2 ~ 3 times, depending on different situations.

Matters needing attention in exterior wall coating construction:

1. Before use, check the label of the paint and mix it carefully. Fasten with the back cover.

2. The storage and construction of coatings shall conform to the temperature conditions specified in the product manual, usually above 5℃. If the paint freezes during storage and transportation, it should be placed in a room with high temperature and allowed to thaw naturally, instead of being baked with fire. The thawed paint can only be used after it is confirmed that there is no qualitative change.

3. It is best for the paint color matching to be completed by the manufacturer or distributor to ensure the consistency of this batch of paint colors. If you need to mix colors on the construction site, you must use the color paste of the brand and origin provided or designated by the manufacturer, which will be prepared by special personnel according to the use requirements and proportion.

4, should pay attention to the finished product protection of painting engineering, prevent man-made pollution caused by crossover operation. If the constructed wall is polluted by dirt, it can be gently scrubbed with a clean wet rag, and repainted when the pollution is serious.

5, pay attention to the weather forecast before construction, avoid homework before rain and snow.

6, brushing tools should be cleaned in time and properly kept after use.

The above is how to construct the exterior wall paint brought by Bian Xiao. All the contents of the most detailed construction steps of exterior wall coating.