How to apply exterior wall paint Precautions for exterior wall paint construction

Painted in the present decoration.

occupies a very important position, because the general installation of the rough house.

It will be painted and renovated. So the process of painting plays a very important role in the use of exterior paints.

In the process, it is necessary to ensure the quality of the stucco. So to a certain extent, the exterior wall paint.

1. Preparation for the construction of exterior wall coatings

1. The base surface is smooth and free of impurities, the corners are dense, the dry humidity of the base plastering is suitable, the wall is tidy, and there are no problems such as water seepage and blistering.

2. Seal the reserved joints of the outer wall to prevent water leakage.

3. The exposed iron parts of the base layer have been treated accordingly with anti-rust.

4. The decorative scaffolding has been erected.

5. Do a good job of safety protection measures for construction personnel.

6. In order to ensure the quality of film formation, weather factors should be considered before the construction of the exterior wall, and the construction and maintenance temperature should be higher than 5.

Second, the construction method of exterior wall coating

1. Exterior wall coating system.

Primer, first topcoat, second topcoat. The painting of the primer is very important, just like the application of lotion before makeup, the application of the primer determines the completeness of the topcoat performance; The first topcoat is mainly to improve the hiding power and adhesion, and increase the fullness; The second topcoat acts as a decoration and reduces the degree of environmental damage.

2. The operation method of exterior wall paint construction.

Mend. Hollow drum: local hollow drum injection of low-viscosity epoxy resin is sufficient; Large-area hollow drums should be completely removed and the base layer should be redone. Gaps: Repair small cracks with putty and cement after drying.

sandpaper sanding and smoothing; Large cracks can be cleaned up to make a waterproof layer, and then embedded with cement mortar. Holes: Polymer cement putty is used to level the holes below 3mm on the surface of the base layer, and the holes larger than 3mm are repaired with cement mortar.

Cleaning. Mortar: Remove with a shovel, scraper, etc. Dust: A broom can be used.

Brush cleaning. Mold: Rinse with high-pressure water outdoors and rinse with clean water to dry. Grease: Wash with a mild detergent.

Fill putty. Local scraping putty: when the wall condition is good, putty can not be used; Choose putty with better quality, and it should be a thin batch rather than a thick brush during construction.

Grinding: When grinding, first use a grinder or coarse abrasive cloth to polish, and then use a fine abrasive cloth to polish; In order not to affect the operation, the base surface or putty should be sanded after drying. Scraping putty:

When scraping the putty, use even force, and master the inclination of the tool to ensure that the putty is uniform and full.

After a brief introduction of the above content, we have a very clear understanding of the construction process of exterior wall coatings, and we can better understand the use of exterior wall coatings in our own home decoration or applied to projects. If there is a problem, it will be corrected in time. Of course, in the process of exterior wall coating, we should pay attention to personal safety, and the premise of safety first is to paint the exterior wall.

In general, to paint the fence, the bits must be simply cleaned before the paint is applied to a flat surface. So that the exterior wall can be better loaded.

Exterior wall coatings have the characteristics of low cost, convenient construction, improved work efficiency, rich colors and easy maintenance and updating. Over the years, it has been widely used in all kinds of buildings, but it also often occurs problems such as uneven color, fading, chalking and peeling, which seriously affects the aesthetics of the building. Many people are skeptical, wavering, and even opposed to the use of architectural paints for finishing.

In fact, the above-mentioned quality problems are mainly caused by improper construction operations, in order to prevent the quality problems of exterior wall architectural coating finishes. Jiezhaoshan came down to share with you the construction methods and precautions of exterior wall coatings.

First, the construction method of exterior wall coating.

1. General provisions.

1) The materials used in the exterior wall project should be selected according to the design requirements and should comply with the provisions of the current material standards. When there is doubt about the quality of the material, it should be sampled and inspected, and it can be used only after it is qualified.

2) During the transportation, storage and construction of exterior wall materials, measures must be taken to prevent damage and deterioration.

3) The exterior wall project should be constructed only after the quality inspection of the substrate or base layer is qualified.

2. Finished product protection.

The exterior wall project must be protected from the finished product and must not damage the curtain wall project.

3. Fire prevention and anti-virus requirements.

The requirements for fire prevention and anti-poison in the construction of exterior wall projects shall be implemented in accordance with the current relevant provisions of the state.

4. Construction technology of elastic putty and elastic exterior wall coating.

1) Clean and inspect the surface layer of anti-cracking mortar on the insulation wall, attachments and dust and other debris.

2) The surface of the anti-cracking mortar is smooth, and the yin and yang corner lines are straight and qualified, and the first elastic putty is scraped after the first putty is dry, followed by the second elastic putty. After the second putty is dry, polish it flat, find out the missing defects, and then polish it to the surface is flat, and the yin and yang corner lines are straight and qualified.

3) Evenly apply a cover primer.

4) 24 hours after the completion of the primer painting, the first elastic exterior wall finishing paint is applied, and the coating is required to be uniform.

5) After the first elastic exterior wall decoration paint is completed, the second elastic exterior wall decoration paint is painted at an interval of 24 hours to achieve uniform brushing, no defects such as flow falling, high color difference, and bottom penetration, which conforms to the provisions of the national standard "Unified Standard for Acceptance of Construction Quality of Building Engineering" (GB50300-2001).

Second, the construction of exterior wall paint precautions.

1. The influence of construction temperature: usually the exterior wall paint in the latex paint needs to be constructed above 5 degrees Celsius, a few have to be required above 10 degrees Celsius, in the cold winter, only at noon the maximum temperature can meet the construction requirements of the exterior wall coating, but the temperature is low in the morning and evening, so the construction personnel do not pay attention to adjust the construction time in time, and there will be a part of the construction wall coating film is not good.

2. The influence of construction humidity: the influence of construction humidity on the construction of exterior wall coatings is often ignored by many construction teams, but when the humidity is greater than 85% or the wall is still wet after rain, the exterior wall coating construction cannot be carried out.

3. The impact of the bottom treatment: in the construction of exterior wall coatings, in addition to the construction humidity is not valued, the bottom treatment will also be one of the problems that are easy to be ignored, the most common is the use of low-strength putty, which affects the quality of the coating, and finally causes the destruction of the entire coating.

Exterior wall coating is very important for decorating the house, because this is a consolidation effect, so this link is very important, exterior wall coating construction has high requirements, because the construction effect is better in the best environment, but what are the requirements for exterior wall coating construction? What are the precautions?

The construction requirements of exterior wall coating are what we must pay special attention to, because this will directly affect the effect, let's take a look at what are the requirements for exterior wall coating construction?

1. The construction wall must be smooth and clean, free of grease and dust, and the wall should be fully dry, without loose and hollow drumming; Generally, the pH value of the construction wall should be lower, and the moisture content should be less than 10%; The new powder cement mortar wall must be maintained for more than 10 days in summer, more than 20 days in winter, 21 days in summer and more than 28 days in winter before construction; The interior walls should ensure that there is no water seepage;

2. Climate and construction: The construction temperature of water-based coatings must be higher than 5, preferably above 10. Do not carry out indoor construction in an environment with a humidity of more than 85%. During the construction of the exterior wall, it is expected that there will be rain within 24 hours.

3. General construction process of interior wall coatings: Grassroots cleaning to fill cracks and other defects (Note) Full batch of putty Polishing Coating and sealing primer (Note) Brush the first coat Brush the second coat (Note) If there are no holes and cracks on the wall, the putty can be directly embedded; For wall construction requirements, the sealing primer can be applied.

The requirements for exterior wall coating construction are the above content, I hope you can strictly follow such requirements, but what are the precautions? Let's find out!

1. Keep air circulation, there can be no fire on the construction site, no welding construction, and smoking is strictly prohibited. In order to avoid getting ** and eyes or inhaling excessive aerosols, please use protective equipment such as protective goggles, masks, gloves, etc.

2. If contaminated**, rinse with neutral detergent and warm water. Pay attention to the sealing after opening the can, and avoid water contamination. Construction cannot be carried out in rainy or windy weather, and the wet wall surface should be dried before construction.

Above I have introduced some requirements and precautions for the construction of exterior wall coatings, I hope these contents can be explained to you!