House building brushing construction method

Abstract

The invention relates to the technical field of building construction, and discloses a house building painting construction method which comprises the following steps: surface pretreatment: cleaning and repairing a wall surface to ensure the smoothness of a painted surface; partition bottom layer brushing is conducted, specifically, appropriate primer is selected according to the wall area characteristics, and partition brushing is conducted; layered brushing is conducted, it is guaranteed that the coating is uniform through multi-layer brushing of the bottom layer, the middle layer and the surface layer, and the thickness of each layer is controlled; environment-adaptive drying and curing: drying the coating by controlling temperature, humidity and ventilation conditions; environment-friendly material application and healthy construction management are carried out, low-VOC environment-friendly materials are adopted, and health protection measures are carried out to ensure the safety of the construction environment. According to the invention, the stability of the coating in high-humidity and old wall environments is realized through partitioned painting, layered thickness control and application of low-VOC environment-friendly paint, and meanwhile, the adhesive force and curing effect of the coating are improved by matching with the construction sequence and interlayer drying management, so that the uniformity and durability of the coating after construction are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a painting construction method for a house building. Background Art

[0002] At present, the painting construction methods for house buildings usually include basic steps such as wall cleaning, base treatment, painting and drying. These methods are designed to provide the wall with a beautiful decorative appearance while having basic durability and protective properties. In general construction processes, basic wall decoration needs are usually met through single-layer or simple layered painting. However, this type of traditional painting construction method has limitations when dealing with special environmental requirements, especially in terms of unstable construction quality and durability.

[0003] Existing painting construction methods usually rely on a single primer and surface coating mode, that is, after a simple base coating, one or two topcoats are directly applied. The principle of this method is to use the primer to improve adhesion and the surface layer to provide decorativeness, but it lacks detailed distinctions in multi-level construction and regional needs, and adhesion is easily weakened due to insufficient compatibility between the primer and the surface layer. In addition, commonly used paint types contain certain volatile organic compounds (VOCs), which will release harmful gases during the drying process, affecting the health of construction workers and residents. After the construction is completed, the living environment may also have residual odors, affecting living comfort.

[0004] The shortcomings of the existing technology mainly lie in the following aspects: first, there is a lack of adaptive coating design for different regional environments, which leads to the coating being prone to peeling and cracking in high humidity, old walls and other environments, affecting the service life of the coating; second, harmful substances in the construction process and coating ingredients can easily affect the health of construction workers and residents, and there is a lack of systematic application of environmentally friendly materials and health management measures; third, there is a lack of scientific construction sequence and interlayer drying control, which leads to poor coating curing effect, affecting the overall coating quality and durability. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a construction method for painting a house, which solves the problem in the prior art that the coating is prone to falling off and cracking in a high humidity or old wall environment due to the lack of regional adaptability design.

[0006] To achieve the above purpose, the present invention is implemented by the following technical scheme: a construction method for painting a building, comprising the following steps:

[0007] Surface pretreatment, by cleaning and repairing the wall to ensure a smooth surface for painting;

[0008] Paint the base layer in different areas. Select appropriate primer according to the characteristics of the wall area and paint the base layer in different areas.

[0009] Layered painting, through the multi-layer painting of the base layer, the middle layer and the surface layer, ensure the uniformity of the coating and control the thickness of each layer;

[0010] Environmental adaptability drying and curing, drying the coating by controlling temperature, humidity and ventilation conditions;

[0011] Application of environmentally friendly materials and healthy construction management, using low-VOC environmentally friendly materials and implementing health protection measures to ensure a safe construction environment.

[0012] Preferably, the surface pretreatment comprises the following steps:

[0013] Clean the wall: Use detergent and water to clean the wall to remove dust and oil stains to ensure the paint adheres;

[0014] Repair wall defects: Use putty to fill cracks and holes in the wall, smooth it with a scraper, wait for the putty to dry, and then use sandpaper to polish the wall until it is smooth and free of marks;

[0015] Base inspection: Check and ensure that the wall surface is flat to within 1 mm.

[0016] Preferably, the partition bottom layer painting comprises the following steps:

[0017] Material selection: Choose the appropriate primer according to the wall area and material characteristics. Use waterproof primer for wet areas and ordinary primer for dry areas.

[0018] Corner and joint treatment: First, apply primer to the corners and joints of the wall to enhance the adhesion of the coating in the corner area;

[0019] Large area primer painting: Apply primer evenly on a large area of ​​the wall, and control the amount of primer per square meter to 0.1-0.15 kg to ensure uniform primer coating.

[0020] Preferably, the layered painting comprises the following steps:

[0021] Primer: Apply the primer thinly, with the coating thickness controlled at 0.2 mm and the amount of primer used being 0.1-0.2 kg per square meter to seal the wall surface;

[0022] Middle layer painting: Apply the middle layer of paint, the coating thickness is controlled at 0.3 mm, and the amount of the middle layer is 0.15-0.2 kg per square meter to improve the covering power and uniformity of the coating;

[0023] Surface coating: Apply the surface coating with a coating thickness of 0.15 mm and a dosage of 0.1 to 0.15 kg per square meter to ensure uniform final color.

[0024] Preferably, the painting sequence of the layered painting comprises the following steps:

[0025] The painting order is "corners - joints - large surfaces", and the coating should be applied from top to bottom to ensure that the coating on the corners is full;

[0026] After each layer is applied, let it dry for 2 to 4 hours, and then apply the next layer after the layer is completely dry.

[0027] Preferably, the environmentally adaptable drying and curing comprises the following steps:

[0028] Natural ventilation: Maintain good ventilation conditions in the construction area to promote natural drying of the coating;

[0029] Temperature and humidity control: Construction should be carried out in an environment with a temperature of 15-25°C and a humidity of 50-70%. When the humidity is high or the temperature is low, construction should be carried out during the noon period.

[0030] Drying in stages: After the base and middle layers are constructed, they should be cured for 1 to 2 hours respectively. After the surface layer is completed, it should be cured for 24 hours to ensure that the coating is fully cured.

[0031] Preferably, the application of environmentally friendly materials includes the following steps:

[0032] Low-VOC paint selection: Use low-VOC water-based environmentally friendly paint throughout the process to ensure that no harmful gases are released during construction;

[0033] Paint is used in layers: primer, middle layer and top layer are all made of low-VOC paint that meets environmental protection standards. Ensure the environment is ventilated after each layer is completed.

[0034] Preferably, the healthy construction management includes the following steps:

[0035] Ventilation management: maintain natural ventilation during construction to avoid accumulation of odor or pollutants in a closed construction environment;

[0036] Protective measures: Construction workers should wear masks and gloves to avoid long-term direct contact with the paint;

[0037] Ventilation after completion: Keep ventilation for more than 24 hours after construction is completed to ensure that residual odors are dissipated and the safety of the living environment is met.

[0038] Preferably, the layered coating thickness is controlled to be 0.2 mm for the bottom layer, 0.3 mm for the middle layer, and 0.15 mm for the surface layer, so that uniform coating thickness and excellent covering power can be achieved through layered coating.

[0039] Preferably, the construction sequence is surface pretreatment, zoned base coating, layered coating, environmentally adaptable drying and maintenance, application of environmentally friendly materials and healthy construction management, and each step is carried out in sequence to ensure the quality of the coating construction.

[0040] The present invention provides a construction method for painting a house, which has the following beneficial effects:

[0041] 1. The present invention ensures the adhesion, hiding power and durability of the coating through scientific zoned bottom coating and layered coating, so that the coating remains uniform and firm in various environments, especially providing excellent weather resistance and protection effects in special scenes such as high humidity and old walls.

[0042] 2. The present invention adopts low-VOC environmentally friendly paint and layered painting construction management, so that the construction process and the finished product meet environmental protection requirements, reduce the impact of volatile organic compounds on air quality, and the living environment after construction is safe and healthy, meeting green building standards.

[0043] 3. The construction sequence and health management measures of the present invention ensure the construction quality and the health of construction workers through ventilation, drying and protection management. Layered drying and appropriate temperature and humidity control improve the curing effect of the coating and extend the service life of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Please see attached Figure 1 The embodiment of the present invention provides a construction method for painting a building, comprising the following steps:

[0047] Surface pretreatment: cleaning and repairing the wall surface to ensure a smooth surface for painting. Through cleaning and repairing, the wall surface becomes smooth and clean, which improves the adhesion of primer and paint, provides a good foundation for subsequent coatings, and effectively reduces the problem of uneven coating or peeling caused by wall defects, thereby improving the overall construction quality;

[0048] The base coating is divided into different areas. The appropriate primer is selected according to the characteristics of the wall area and the base coating is carried out in different areas. The base coating in different areas meets the moisture resistance and alkali resistance requirements of different areas through the targeted selection of primer materials. The uniformity of the base coating ensures the adhesion and protection of the subsequent coating, avoids the problem of coating shedding due to insufficient primer, and improves the reliability of construction.

[0049] Layered painting ensures uniform coating through multi-layer painting of the base layer, middle layer and surface layer, and controls the thickness of each layer. Layered painting makes the function of each layer of coating be effectively exerted through thin layer by layer, thickness control and sequence arrangement, so as to obtain uniform and smooth painting effect, reduce construction defects such as sagging and brush marks, improve the aesthetics and durability of the coating, and meet the dual requirements of decoration and protection;

[0050] Environmental adaptability drying and maintenance: drying the coating by controlling the temperature, humidity and ventilation conditions. By controlling the temperature, humidity and ventilation conditions of the construction environment, the coating is dried in a suitable environment to avoid cracking or peeling caused by uneven or too fast drying, thereby improving the durability and adhesion of the coating and ensuring the stability and reliability of the painting construction.

[0051] The application of environmentally friendly materials and healthy construction management, the use of low-VOC environmentally friendly materials and the implementation of health protection measures to ensure a safe construction environment, the application of environmentally friendly materials and healthy construction management effectively reduce the emission of harmful gases, reduce the impact on the health of construction workers and residents, and achieve green construction.

[0052] Please see attached Figure 1 In a preferred embodiment of the present invention, the surface pretreatment comprises the following steps:

[0053] Clean the wall: Use detergent and water to clean the wall, remove dust and oil stains to ensure the adhesion of the paint. First, choose a suitable detergent (such as neutral detergent), and use the diluted detergent solution and water to thoroughly clean the wall to ensure that the dust and oil stains attached to the wall are removed. During the cleaning process, you can use a soft brush or rag to wipe the wall to avoid scratching or damaging the wall surface to ensure smoothness during the cleaning process. After cleaning, you need to wait for the wall to dry thoroughly to avoid the influence of residual moisture on the adhesion of subsequent paint, thereby improving the uniformity of brushing and the firmness of adhesion, laying a good foundation for subsequent construction, and avoiding the occurrence of problems such as loose coating and easy falling off;

[0054] Repair wall defects: Use putty to fill cracks and holes in the wall, smooth it with a scraper, wait for the putty to dry, and then use sandpaper to polish the wall until it is smooth and free of marks. Apply the putty evenly to the defective area, and smooth it with a scraper to ensure that the filled area is flat and has no bumps. After the putty dries, use fine sandpaper to gently polish the filled area to make it flush and smooth with the rest of the wall. The polishing process needs to maintain uniform force to avoid uneven marks. The repaired wall should have no cracks or gaps, and no obvious height difference to the touch, thus ensuring the smoothness and integrity of the painting process, effectively reducing the risk of cracking and peeling of the coating in the later stage, and improving the durability and aesthetics of the coating;

[0055] Base inspection: Check and ensure that the wall flatness error does not exceed 1 mm. This inspection ensures the uniform adhesion of the paint on the flat surface, helps to achieve a higher quality coating effect, reduces brush marks, sagging and other problems during construction, and improves the overall coating's aesthetics and the stability of construction quality.

[0056] Please see attached Figure 1 In a preferred embodiment of the present invention, the partition bottom layer painting comprises the following steps:

[0057] Material selection: Choose the corresponding primer according to the wall area and material characteristics. Use waterproof primer in wet areas and ordinary primer in dry areas. Waterproof primer should be used first in wet areas (such as kitchens and bathrooms). This primer has excellent moisture resistance and can effectively prevent moisture penetration and protect the stability and adhesion of subsequent coatings. In relatively dry areas (such as living rooms and bedrooms), ordinary primer can be used to meet basic adhesion and protection requirements. By selecting materials according to regional characteristics, the adaptability of the coating is ensured, and the adhesion and durability of the coating in different environments are improved, preventing problems such as coating shedding and cracking caused by improper primer materials. At the same time, it provides high-quality bottom layer protection for subsequent construction and extends the service life of the coating.

[0058] Corner and joint treatment: First, apply primer to the corners and joints of the wall to enhance the adhesion of the coating in the corner areas. When implementing, use a delicate brushing tool to apply waterproof or high-adhesion primer to the corners and joints to ensure that the primer evenly covers the entire corner area without leaving any gaps. When applying, pay attention to the moderate amount of paint to avoid accumulation or insufficiency, so that a stable adhesion layer is formed at the corners. By sealing the corners and joints with primer, the adhesion of the coating at these vulnerable parts is enhanced, reducing the risk of cracking caused by changes in structural stress or humidity, thereby reducing the need for subsequent maintenance due to loose coatings and extending the coating's intact cycle;

[0059] Large-area primer painting: Apply primer evenly on large areas of the wall, and control the amount of primer per square meter to 0.1-0.15 kg to ensure uniform primer coating. When implementing, choose a suitable roller or brush to evenly apply primer at 0.1-0.15 kg per square meter to ensure that the thickness of the primer layer in each part is uniform without accumulation or missing coating. During the painting process, the roller should be kept stable and painted in the same direction to ensure a smooth coating. To avoid brush marks or paint accumulation, the amount of primer applied each time should be moderate to ensure continuous and uniform painting of large areas, avoid color difference or uneven layer thickness caused by improper operation, thereby improving the construction quality of wall painting, making the subsequent intermediate layer and surface layer more firmly adhered and the effect more uniform.

[0060] Please refer to the attached Figure 1 In a preferred embodiment of the present invention, the layered painting comprises the following steps:

[0061] Primer coating: Apply the primer thinly, with the coating thickness controlled at 0.2 mm. The amount of primer used is 0.1-0.2 kg per square meter to seal the wall surface. When implementing, select a suitable primer and apply it evenly at a dosage of 0.1-0.2 kg per square meter to control the coating thickness at 0.2 mm, forming a thin and dense closed coating. During the painting process, the fluidity and uniformity of the paint should be maintained to avoid over-thickness or under-painting. Use a roller or brush to gently roll in the same direction to ensure that the coating is even and smooth, and avoid accumulation or sagging. After the primer is applied, wait for the coating to dry completely. The primer forms a tightly sealed thin layer, which effectively seals the wall surface, improves the adhesion of subsequent coatings, and prevents moisture or other substances in the wall from penetrating into the coating;

[0062] Middle layer painting: When painting the middle layer of paint, the coating thickness is controlled at 0.3 mm, and the amount of the middle layer is 0.15-0.2 kg per square meter to improve the covering power and uniformity of the coating. When implementing, evenly apply the middle layer of paint at a dosage of 0.15-0.2 kg per square meter, and the coating thickness is controlled at 0.3 mm to ensure that the thickness of the middle layer is consistent and has a good covering effect. During the painting process, the roller or brush should be kept stable, and the paint should be evenly applied in the direction of "top to bottom" or "left to right" to avoid paint accumulation or uneven thickness. The middle layer painting enhances the covering power of the coating, prevents the bottom layer from showing through, improves the uniformity of the wall color, and avoids color differences caused by uneven wall surface or defects in the bottom layer;

[0063] Surface coating: Apply the surface coating, the coating thickness is controlled at 0.15 mm, and the dosage is 0.1-0.15 kg per square meter to ensure the final color is uniform. When implementing, choose a surface coating with high coverage, and apply it at a dosage of 0.1-0.15 kg per square meter, and the coating thickness is controlled at 0.15 mm. The surface coating must ensure that the coating is thin and uniform, avoiding a heavy feeling, so as to achieve the best color and smooth effect. During construction, the roller or brush is gently applied in the same direction to ensure that the surface coating is evenly distributed, without brush marks or sagging. After the surface coating is completed, let the paint dry naturally to ensure that the color is stable and achieve the best decorative effect. Through uniform surface coating, the wall surface obtains a consistent color, smooth and beautiful decorative effect. The surface layer not only improves the visual effect of the wall, but also enhances the durability of the coating, so that the wall remains beautiful and does not fade in long-term use, and improves the overall decorativeness and service life of the wall, providing a good visual and texture effect for the architectural space.

[0064] Please refer to the attached Figure 1In a preferred embodiment of the present invention, the painting sequence of the layered painting comprises the following steps:

[0065] The painting order is "corners - joints - large surfaces", and the coating is applied from top to bottom to ensure that the coating on the corners is full. By painting the corners and joints first and then the large surfaces, it not only avoids the problem of missing paint on the corners and affecting the overall effect, but also effectively reduces the sagging phenomenon caused by the flow of paint during the painting process, making the coating more uniform and beautiful.

[0066] After each layer is applied, it is left to dry for 2 to 4 hours. The next layer can be applied after the layer is completely dry. The sufficient drying after each layer ensures the adhesion and curing effect of the coating, prevents the mutual influence between multiple layers, and reduces the risk of separation or falling off between layers, making the coating smoother and more uniform, laying the foundation for the long-term maintenance of the coating effect.

[0067] Please refer to the attached Figure 1 In a preferred embodiment of the present invention, the environmentally adaptable drying and curing comprises the following steps:

[0068] Natural ventilation: Maintain good ventilation conditions in the construction area to promote the natural drying of the coating. Natural ventilation provides stable air flow conditions for the coating to dry evenly, effectively avoiding problems such as cracking and blistering of the coating caused by uneven drying speed. In addition, ventilation also improves the air quality of the construction environment, effectively reduces the residual paint odor, and ensures the health of construction workers and residents;

[0069] Temperature and humidity control: Construction should be carried out in an environment with a temperature of 15-25℃ and a humidity of 50-70%. When the humidity is high or the temperature is low, construction should be carried out during the noon period. Construction under this temperature and humidity environment will make the coating drying process more uniform and stable, reduce the shrinkage and cracking of the coating during drying, and improve the overall quality of the coating construction, while also extending the service life of the coating;

[0070] Drying in stages: After the base and middle layers are constructed, they are cured for 1 to 2 hours respectively, and after the surface layer is completed, it is cured for 24 hours to ensure that the coating is completely cured. Drying in stages ensures the curing time of each layer of paint, so that the coating has reached an ideal dry state before the next construction, effectively improving the interlayer adhesion and overall flatness. Long-term maintenance of the surface layer can better ensure the durability and aesthetic effect of the coating, reduce the occurrence of peeling, blistering and other problems after the construction is completed, and extend the service life of the coating.

[0071] Please refer to the attached Figure 1 In a preferred embodiment of the present invention, the application of environmentally friendly materials includes the following steps:

[0072] Low-VOC coating selection: Use low-VOC water-based environmentally friendly coatings throughout the process to ensure that no harmful gases are released during construction. By using water-based environmentally friendly coatings with low volatile organic compounds (VOC) content, the release of harmful gases during construction is reduced, protecting the health of construction workers and residents;

[0073] Layered use of paint: The primer, middle layer and surface layer are all low-VOC paints that meet environmental protection standards. After each layer is completed, ensure that the environment is ventilated. By using low-VOC environmentally friendly paints in the primer, middle layer and surface layer, the environmental protection of the entire construction process and the final product is ensured, making the indoor environment after construction safer and pollution-free. The layered use of low-VOC paints not only reduces the burden of each layer of coating on the environment, but also effectively avoids the impact of VOC accumulation in the coating on indoor air quality, providing residents with a healthy and safe living environment.

[0074] Please see attached Figure 1 In a preferred embodiment of the present invention, the healthy construction management comprises the following steps:

[0075] Ventilation management: Natural ventilation is maintained during construction to avoid the accumulation of odors or pollutants in a closed construction environment. Natural ventilation management during construction significantly reduces the concentration of volatile compounds in the air, effectively preventing the accumulation of odors and harmful substances indoors, improving the safety and comfort of the construction environment, protecting the health of construction workers, and helping to create a more environmentally friendly and safe construction environment;

[0076] Protective measures: Construction workers wear masks and gloves to avoid long-term direct contact with paint. Construction workers wear masks and gloves and other protective measures to avoid irritation to the respiratory tract and skin by volatile chemicals and pigment particles in the paint, effectively protecting the health of construction workers. Protective measures reduce occupational health risks, provide effective personal protection, and lay the foundation for healthy construction management;

[0077] Ventilation after completion: Keep ventilation for more than 24 hours after construction is completed to ensure that residual odors are dissipated and meet the safety of the living environment. Through continuous ventilation for more than 24 hours after completion, residual odors and trace volatiles can be fully dissipated, effectively ensuring the cleanliness of indoor air.

[0078] Please see attached Figure 1In a preferred embodiment of the present invention, the layered coating thickness is controlled to be 0.2 mm for the base layer, 0.3 mm for the middle layer, and 0.15 mm for the surface layer. Uniform coating thickness and excellent covering power are achieved through layered coating. By controlling the thickness of the base layer at 0.2 mm, a uniform sealing effect of the wall is ensured, and the adhesion and durability of subsequent coatings are improved; the thickness of the middle layer is controlled at 0.3 mm, which ensures the covering power of the coating, so that the color and texture of the base layer will not show through, thereby enhancing the visual effect of the wall; by controlling the thickness of the surface layer at 0.15 mm, the flatness and uniform color of the final decorative layer are ensured, thereby improving the aesthetic effect of the wall.

[0079] Please see attached Figure 1 In a preferred embodiment of the present invention, the construction sequence is surface pretreatment, zoned base coating, layered coating, environmental adaptability drying and maintenance, application of environmentally friendly materials and healthy construction management. Each step is performed in sequence to ensure the quality of the coating construction. First, surface pretreatment and zoned base coating provide a flat and uniform adhesion base for the coating, thereby improving the adhesion and durability of the coating; layered coating controls the thickness of the base layer, the middle layer and the surface layer and applies them in sequence, so that the coating has excellent covering power and decorative effect; environmental adaptability drying and maintenance promote uniform curing of the coating under suitable temperature and humidity, thereby improving the aesthetics and durability of the coating; finally, through the application of environmentally friendly materials and healthy construction management, the health of construction workers and residents is guaranteed, which meets the green building standards.

[0080] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0081] Example 1: Ordinary residential interior painting construction method

[0082] Applicable scenarios: This embodiment is suitable for painting the interior walls of ordinary residences and is suitable for relatively dry environments, such as living rooms, bedrooms and other areas.

[0083] Implementation steps:

[0084] Surface pretreatment: Clean the wall, remove dust and oil stains, and repair cracks and holes in the wall. Make sure the wall is flat and has no obvious defects.

[0085] Partition base painting: Apply ordinary primer evenly on the entire wall to improve the adhesion of the coating. Control the thickness of the primer and keep its usage at 0.1-0.15 kg per square meter.

[0086] Layered painting:

[0087] The bottom layer is applied thinly, with the thickness controlled at 0.2 mm.

[0088] Apply the middle layer with a thickness of 0.3 mm to increase covering power.

[0089] Apply a thin layer of paint with a thickness controlled at 0.15 mm to ensure consistent final color.

[0090] Environmental adaptability, drying and maintenance: Keep natural ventilation during construction, control the construction environment temperature at 15-25℃, and the humidity at 50-70%. Dry for 2-4 hours after each layer is applied, and dry for 24 hours after the surface layer is completed.

[0091] Application of environmentally friendly materials and healthy construction management: Use low-VOC water-based environmentally friendly paint throughout the process, maintain ventilation during construction, construction workers wear masks and gloves, and ventilate for more than 24 hours after construction is completed.

[0092] Effect: This embodiment is suitable for indoor construction in ordinary residences. After construction, the wall surface is smooth and beautiful, the coating adheres firmly and has uniform color, and the environmentally friendly coating ensures indoor air quality and is harmless to the human body.

[0093] Example 2: Painting method for high humidity areas (such as bathrooms and kitchens)

[0094] Applicable scenarios: This embodiment is suitable for areas with high humidity in residential buildings, such as bathrooms and kitchens, and the coating needs to have good waterproof and moisture resistance.

[0095] Implementation steps:

[0096] Surface pretreatment: Clean the wall thoroughly to ensure that there is no oil or water stains left; repair cracks or holes with waterproof putty to ensure that the wall surface is flat.

[0097] Partition base painting: Apply waterproof primer on the wall, controlling the amount to 0.15 kg per square meter to enhance the waterproof and moisture-proof effect. Paint the corners and joints first, and then paint the wall in large areas.

[0098] Layered painting:

[0099] The bottom layer is coated with waterproof paint with a thickness of 0.2 mm to ensure uniform coverage of the waterproof layer.

[0100] The middle layer is painted with special moisture-proof paint with a thickness controlled at 0.3 mm to enhance moisture resistance.

[0101] The surface is painted with washable and anti-fouling paint with a thickness of 0.15 mm to prevent the accumulation of water stains and stains and facilitate cleaning.

[0102] Environmental adaptability drying and curing: During the construction process, maintain good ventilation, control the temperature at 15-25℃, and the humidity at 50-60%. Curing for 2-4 hours after each layer is applied, and drying for 24 hours after the surface layer is constructed.

[0103] Application of environmentally friendly materials and healthy construction management: Low-VOC waterproof and anti-fouling environmentally friendly coatings are used throughout the process. After the construction is completed, ventilation is maintained for 48 hours to ensure that residual odors are dissipated, in line with the environmental protection requirements for wet area construction.

[0104] Effect: This embodiment improves the durability and anti-fouling ability of the coating in high-humidity areas by applying waterproof coating and waterproof and moisture-proof coating to the partitioned bottom layer, ensuring the stability and service life of the wall in a high-humidity environment. The use of environmentally friendly materials ensures the air quality after construction.

[0105] Embodiment 3: Construction method for renovation of old buildings

[0106] Applicable scenarios: This embodiment is applicable to the renovation of old building walls. The old walls may have many cracks, flaws or mildew spots, which require in-depth pretreatment.

[0107] Implementation steps:

[0108] Surface pretreatment: First use a cleaner to remove mildew or dirt on the wall, then pre-treat the wall with an anti-alkali primer to prevent alkaline substances from seeping out of the old wall. Use anti-cracking putty to repair cracks, and polish it thoroughly after it dries to ensure it is flat.

[0109] Partition base coating: Use alkali-resistant primer and control the dosage to 0.1-0.15 kg per square meter. Give priority to the corners and cracks of the wall, and then paint a large area to improve the adhesion of the old wall coating.

[0110] Layered painting:

[0111] The bottom layer is painted with anti-alkali paint with a thickness controlled at 0.2 mm to seal the surface of the old wall and enhance adhesion.

[0112] The middle layer is painted with a paint with strong covering power and the thickness is controlled at 0.3 mm to cover up the color and defects of the old wall.

[0113] The surface is painted with highly weather-resistant paint with a thickness controlled at 0.15 mm to ensure that the renovated wall has uniform color, durability and stain resistance.

[0114] Environmental adaptability drying and maintenance: During construction, natural ventilation is maintained, and the temperature is controlled at 20℃ and the humidity is 50-60%. Each layer is left to dry for 3-4 hours after construction, and the surface layer is ventilated for 48 hours after construction.

[0115] Application of environmentally friendly materials and healthy construction management: Use low-VOC alkali-resistant paint and highly weather-resistant environmentally friendly paint. Construction workers wear protective masks and maintain ventilation for 48 hours after construction is completed to ensure the renovation of old walls is safe and environmentally friendly.

[0116] Effect: This embodiment effectively solves problems such as mildew and alkaline seepage on old walls. Through multi-layer anti-alkali treatment and weather-resistant coating, the aesthetics and durability of old building renovations are significantly improved. The use of low-VOC paint ensures the air quality after renovation and provides users with a healthy living environment.

[0117] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction method for painting a building, characterized in that: The following steps are involved: Surface pretreatment, by cleaning and repairing the wall to ensure a smooth surface for painting; Paint the base layer in different areas. Select appropriate primer according to the characteristics of the wall area and paint the base layer in different areas. Layered painting, through the multi-layer painting of the base layer, the middle layer and the surface layer, ensure the uniformity of the coating and control the thickness of each layer; Environmental adaptability drying and curing, drying the coating by controlling temperature, humidity and ventilation conditions; Application of environmentally friendly materials and healthy construction management, using low-VOC environmentally friendly materials and implementing health protection measures to ensure a safe construction environment.

2. A construction method for painting a building according to claim 1, characterized in that: The surface pretreatment comprises the following steps: Clean the wall: Use detergent and water to clean the wall to remove dust and oil stains to ensure the paint adheres; Repair wall defects: Use putty to fill cracks and holes in the wall, smooth it with a scraper, wait for the putty to dry, and then use sandpaper to polish the wall until it is smooth and free of marks; Base inspection: Check and ensure that the wall surface is flat to within 1 mm.

3. A construction method for painting a house according to claim 1, characterized in that: The partition bottom layer painting comprises the following steps: Material selection: Choose the appropriate primer according to the wall area and material characteristics. Use waterproof primer for wet areas and ordinary primer for dry areas. Corner and joint treatment: First, apply primer to the corners and joints of the wall to enhance the adhesion of the coating in the corner area; Large area primer painting: Apply primer evenly on a large area of ​​the wall, and control the amount of primer per square meter to 0.1-0.15 kg to ensure uniform primer coating.

4. A construction method for painting a house according to claim 1, characterized in that: The layered painting comprises the following steps: Primer: Apply the primer thinly, with the coating thickness controlled at 0.2 mm and the amount of primer used being 0.1-0.2 kg per square meter to seal the wall surface; Middle layer painting: Apply the middle layer of paint, the coating thickness is controlled at 0.3 mm, and the amount of the middle layer is 0.15-0.2 kg per square meter to improve the covering power and uniformity of the coating; Surface coating: Apply the surface coating with a coating thickness of 0.15 mm and a dosage of 0.1 to 0.15 kg per square meter to ensure uniform final color.

5. A construction method for painting a house according to claim 1, characterized in that: The painting sequence of the layered painting comprises the following steps: The painting order is "corners - joints - large surfaces", and the coating should be applied from top to bottom to ensure that the coating on the corners is full; After each layer is applied, let it dry for 2 to 4 hours, and then apply the next layer after the layer is completely dry.

6. A construction method for painting a house according to claim 1, characterized in that: The environmental adaptability drying and curing comprises the following steps: Natural ventilation: Maintain good ventilation conditions in the construction area to promote natural drying of the coating; Temperature and humidity control: Construction should be carried out in an environment with a temperature of 15-25°C and a humidity of 50-70%. When the humidity is high or the temperature is low, construction should be carried out during the noon period. Drying in stages: After the base and middle layers are constructed, they should be cured for 1 to 2 hours respectively. After the surface layer is completed, it should be cured for 24 hours to ensure that the coating is fully cured.

7. A construction method for painting a house according to claim 1, characterized in that: The application of environmentally friendly materials includes the following steps: Low-VOC paint selection: Use low-VOC water-based environmentally friendly paint throughout the process to ensure that no harmful gases are released during construction; Paint is used in layers: primer, middle layer and top layer are all made of low-VOC paint that meets environmental protection standards. Ensure the environment is ventilated after each layer is completed.

8. A construction method for painting a house according to claim 1, characterized in that: The healthy construction management includes the following steps: Ventilation management: maintain natural ventilation during construction to avoid accumulation of odor or pollutants in a closed construction environment; Protective measures: Construction workers should wear masks and gloves to avoid long-term direct contact with the paint; Ventilation after completion: Keep ventilation for more than 24 hours after construction is completed to ensure that residual odors are dissipated and the safety of the living environment is met.

9. A construction method for painting a house according to claim 1, characterized in that: The layered coating thickness is controlled to be 0.2 mm for the base layer, 0.3 mm for the middle layer, and 0.15 mm for the surface layer. Uniform coating thickness and excellent covering power are achieved through layered coating.

10. A construction method for painting a house according to claim 1, characterized in that: The construction sequence is surface pretreatment, zoned base coating, layered coating, environmentally adaptable drying and maintenance, application of environmentally friendly materials and healthy construction management. Each step is carried out in sequence to ensure the quality of the coating construction.

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