How many processes are there in exterior paint painting? What are the steps to renovate an exterior

There are usually five main processes involved in exterior painting, including base treatment, primer application, intermediate coating, topcoat application and clean-up.

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First of all, the base treatment is a very important step, which directly affects the adhesion and durability of the coating. This step mainly includes cleaning the dust, oil stains and other dirt on the wall, repairing the cracks and potholes on the wall, and sanding the wall to make it smooth and smooth.

Next, the primer is applied to enhance the adhesion of the paint to the wall and prevent the paint from peeling off. Primers are usually transparent or translucent and can effectively seal the wall surface, preventing moisture and air ingress.

Then, the intermediate paint is applied to increase the thickness of the paint and improve its abrasion and weather resistance. Intermediate lacquers are usually tinted, and different colors can be selected depending on the design requirements.

Next, the topcoat is applied to provide good decorative and protective effect. The topcoat is usually glossy and can make the wall look smoother and brighter.

Finally, the clean-up work is done to keep the construction site tidy and avoid the paint from polluting the surrounding environment.

In the local market, exterior paint painting is usually between 30-60 yuan per square meter, depending on the brand and type of paint chosen, as well as the ease of construction.

When choosing exterior wall paints, it is recommended to choose coatings with good quality, strong weather resistance, and stable color to ensure the beauty and durability of the wall. At the same time, it is also necessary to choose an experienced and skilled construction team to ensure the quality of construction.

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Facades are usually exposed to the air and need to withstand wind, rain and snow, so we usually paint the facades to not only make the facades appear more refined, but also to increase the life of the facades. So what are the steps of exterior wall paint coating, and what do you need to pay attention to when coating exterior wall paint? The following article will introduce you to it.

What are the steps of exterior paint painting? Grass roots**. In exterior wall paint painting, if there are uneven areas in the cement, it is important to first remove dust and impurities from the walls and their layers.

The mortar is smooth, and holes and cracks also need to be repaired with cement. Glue brushing. When we submit the wall brush, we first need to dilute the glue in the proportion on the instructions and then paint the wall evenly with a roller.

It is best to apply about three times on the surface, and the glue should be even, not too much and not too little. Locally filled putty. After the glue on the wall is dry, you can use putty to fill the uneven parts of the wall.

If the putty is too thick, it needs to be diluted with water. Annoyed with the child with all his attention. Place the assigned bored child on the support plate and apply it with a rubber spatula, preferably from top to bottom, usually about 2 to 3 times, once at a time.

The putty should not be too thick. After brushing your teeth, sand with sandpaper. Brush the primer.

The bottom material of the wall should be diluted according to the instructions, then stirred well, and then applied to the wall with a roller. The paint should be even, the brush should not leak, and it should not be too thick.

After the bottom material is dry, if the uneven areas need to be filled with putty, then sanded. Precautions for exterior wall paint coating. When painting the exterior wall, the spirit of the construction personnel needs to be sufficient, so the exterior wall painting is a dry aerial work, if the spirit is insufficient.

This can be extremely dangerous. When the exterior wall is painted. Scaffolding needs to be checked for stability before construction can begin.

When painting the exterior walls, it is best for the construction crew not to wear slippers, high heels, or smooth shoes, which are prone to slipping. or falling, affecting people's construction safety.

Generally speaking, there are four processes. 1. Wall cleaning, 2. Wall repair, 3. Scraping putty, 4. Paint whitewashing.

Generally, there are one or two processes. Check the condition of the wall base first, clean the wall base, and treat the holes and cracks in the wall. Stretch the line according to the size requirements.

First of all, the wall needs to be treated, then the wall is sanded, and then the paint is painted, and the paint must be painted more than three times to make the color reach a uniform degree. The step of painting the wall is to first process, then inspect, finally confirm the tools, then apply the wall, finally paint, and then sand.

First you need to apply a layer first, then wait until it is dry and slowly apply another layer with tweezers, and finally sprinkle some cement on it.

First, the construction process is based on the principle of top-down, first wall and then line.

1. Grassroots treatment (repair, cleaning).

2. Fill putty, local scraping putty, grinding, full scraping putty, grinding 3, primer construction.

4. Coated bone slurry and knurling (brushing).

5. The first topcoat construction.

6. The second topcoat construction.

7. Paint trimming.

Second, the preparation of construction tools The main machines are:

1. Brushing tools: pen, paint brush, etc.;

2. Roller coating tools: plush rollers, material barrels, etc.;

3. Plastering tools: iron plaster, putty, ash tray, etc. and electric mixer;

First, the principle of the construction process is top-down, first the wall and then the line.

1 Basic treatment (repair, cleaning).

2. Fill putty, local scrape putty, smooth, full scrape putty, smooth 3 primer construction.

4 Wrapping the bone marrow and knurling (drawing).

5 Apply the first finish

6 Apply the second finish.

7 Finish painting.

Second, the preparation of construction tools The main machines and tools include:

1 Brushes & Paint Tools: Brushes, brushes, etc.

2. Roller coating tools: plush rollers, hoppers, etc.; , 3 Painting tools: iron plate, putty, ashtray, etc., electric mixer;

The practice of exterior wall paint: It is the production process of exterior wall paint (latex paint). There is also the construction method (practice) of exterior wall paint.

Production process of exterior wall paint (latex paint). Here's how it works:

Stone selection - coarse grinding - ball milling - filtration - mixing - glue stirring - re-formula batching - glue stirring - according to the need to mix multiple times - add a variety of stones - and add a variety of additives and glue to stir evenly - sample brushing test - standard barrel - packaging - warehousing. Production is complete. Approximate production process.

Exterior wall coating construction method (practice). Written for reference based on personal practical work management experience.

1. Exterior wall coating practices and processes:

First of all, the practice and process of exterior wall construction:

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, fast construction speed; Less brushing, repairing convex and concave corners brushing.

Second, the main points of exterior wall coating construction:

1. Exterior wall coating construction is high-altitude work, and construction safety must be ensured: all types of work and operations must have a high safety precaution process to ensure that: scaffolding workers, winch machinery, handling, putty, spraying, repairing, on-site management, 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 construction season and time period and weather temperature: the construction of exterior wall coatings is susceptible to the influence of 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.

It is necessary to do a good job of collecting weather information and then use it as a reference for construction. The temperature of the season and time of day, the light on the dark side of the wall, etc., should be considered.

3. Shielding and protective measures for construction: The surface and protective packaging of adjacent buildings and equipment 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.

Exterior wall paint substrate requirements.

The most basic requirements for the coating surface of architectural coatings are dry, firm and clean.

1. Drying: Cement wall maintenance for at least 1 month (7 weeks in winter), humidity less than 6%, wood surface humidity less than 10%; There are no structural problems such as water seepage and cracks on the wall.

2 Firm: no chalking loosening, no loose patent leather on the old wall.

3 Clean: No oil, grease, mold, algae and other adhesions.

If the substrate does not meet the requirements, it will seriously affect the performance of the paint film. High humidity on the wall may cause blistering, peeling, peeling of the paint film, alkali seepage on the wall, loss of light and even mildew on the wall; Loose substrate and dirt adhesion will affect the adhesion of the paint film, resulting in peeling, peeling and other phenomena, if there is mold breeding, it will cause the paint film to grow mold.

Exterior wall paint substrate treatment.

1 New walls. Maintenance for more than 1 month, humidity 6% (can be tested with a hygrometer), remove floating ash stains and exuding alkali.

2 Old walls. High-pressure water rinsing or mechanical grinding to remove dust and possible breeding of bacteria and algae, wash and dry, if necessary, brush with anti-mildew solution (can be prepared into a 10% solution with bleaching powder), and then rinse with water; The old coating is intact and can be reapplied directly after cleaning the surface; The old coating is pulverized, blistered, cracked, and peeled, and the old coating film needs to be removed and repainted with primer and topcoat twice.

3 Use wallpaper for the wall. The wallpaper can be torn off, the glue can be washed off, and the paint can be applied after drying according to the condition of the wall.

4 Fiberglass surface. Can be applied directly to the topcoat.

5 Wood. Remove or replace worn and rotten parts of the surface, clean and repair the surface, and the joints between doors, windows and walls should be embedded with elastic fillers.

6 Metal surfaces. Iron: The surface rust spots should be removed first, and the corresponding anti-rust primer should be applied immediately after cleaning; Non-ferrous products: remove oil stains, oxide layers, etc., and apply a primer that increases adhesion accordingly.

Exterior wall paint, wall treatment.

1 If the wall is flat, it is recommended not to use putty.

2 If putty is used, it is easy to thin the batch and not thick.

3. In addition to being easy to batch and easy to polish, the requirements for putty should also have good strength and durability. For exterior walls, kitchens and bathrooms, putty is required to have better adhesion, bond durability and water resistance.

4. How to deal with possible problems on the wall: dust and powder - can be washed with high-pressure water outdoors, and wiped with a damp cloth indoors; Grease – clean with a neutral detergent; Mortar - remove with a shovel, scraper, etc.; Mold – rinse with high-pressure water outdoors, scrub with bleach for a few minutes indoors, rinse with clean water to dry.

Exterior wall coating construction conditions.

Because latex paint is a water-based coating, it has high requirements for construction and maintenance conditions. The construction and maintenance temperature is higher than 5, and the ambient humidity is lower than 85% to ensure good film formation. Low temperature will cause problems such as pulverization and cracking of the paint film of latex paint, and the environmental humidity will cause the paint film to not dry for a long time, and eventually lead to poor film formation.

The weather must be considered in the construction of the exterior wall, and it must not rain for 12 hours before painting latex paint to ensure that the substrate is dry; After painting, it should not rain for 24 hours to avoid the paint film being washed away by rain.

Enter the site, protect the finished product, repair the wall, scrape putty, roll the primer, cover the paint twice, trim and clean.

Construction process Composition: primer, TY 2010 acrylic paint. Features:

Strong decoration, excellent water resistance, weather resistance, no falling off, no discoloration. Construction requirements The base surface must be flat, solid, clean, dry, and have a moisture content of 10%. The temperature of the wall shall not be lower than 5, and it is not suitable for operation in windy and rainy days.

The scaffolding is kept at a distance of about 20 cm from the wall.

1. Grassroots treatment. The base layer is a concrete wall: the concrete surface is chiseled, cleaned, the concave and convex surface is flattened, the oil stain should be removed, the holes should be leveled, and the water absorption depth is 8-10mm.

2. Hang the vertical gauge. Hang vertical, set square, and plaster cakes at doors and windows, corners, buttresses, walls, etc., respectively, and press the ash cake to punch the bar, and pop up the plastering layer control line on the wall.

3. Plaster the bottom layer. Brush 10% of the water of 107 glue cement slurry (water-cement ratio, followed by 1:3 cement mortar, each time thickness 5-7mm, layered and flushed smoothing, and scraped with a ruler, straightened, wooden trowel rubbing hair, cement mortar wall bottom should be wiped into a rough surface, in order to facilitate external decoration, increase the cohesion.

4. Plaster the surface layer of ash (interior wall). When the bottom is ash.

Five, six into dry, can be wiped surface layer mortar, surface mortar mix ratio 1: cement mortar or according to the design of the selection, thickness 5-8mm, with a scraper to scrape flat, wooden trowel rubbing, iron trowel slipping, compacting, yin and yang angle with yin and yang angle trowel polished.