Loss of paint in home renovation is difficult to completely avoid, but through some methods to minimize unnecessary wear and tear, save paint. To reduce the loss of paint, first of all, we need to understand the causes of paint wear in home renovation.

(1) Material Miscalculation

For those who are preparing for the decoration for the first time, the calculation of errors in the materials needed will lead to the incomplete use of the purchased paint. At the end, it will only be idle, resulting in wear and tear. If the choice of decoration is a way of contracting the workers and the paint is mostly purchased by the owner, then when the calculation mistakes buy too much paint and all of them are unsealed, the use of endless paint will cause great Waste and wear.

(2) The rough condition of the wall

The roughness of the base surface is an important factor in determining the loss of the primer. The rougher the wall surface to be painted is, the greater the loss of the paint is. For projects that require multiple layers of construction, the smoothness of each layer of paint and the smoothing effect of the sandpaper after construction will have a direct impact on the subsequent wear of the paint.

(3) Improper wall painting method

At present, the coating methods of paints generally include brush coating, roller coating, traditional air spraying and high pressure airless spraying. Although the use of high-pressure airless spray method is faster, but the paint loss will be much greater than the traditional air spray, brush and roller coating.

(4) Improper selection of Construction Equipment:

When spraying, the different choice of nozzle will also affect the degree of wear of the paint. The construction unit or the constructor must meet the requirements of a tight construction schedule and achieve a high spraying efficiency. Larger gun nozzles may be used, causing a waste of paint.

(5) Environmental factors:

Various environments around the construction also affect the paint loss to varying degrees. In windy outdoor areas, paint losses are clearly higher than in a well ventilated and relatively closed shop.

(6) The operating level of the constructor:

Due to the individual's different operating levels, different construction operators may have varying degrees of construction loss during construction, especially in projects that require extensive construction.

Home Improvement Encyclopedia: What are Brush Painting, Roller Coating, Traditional Air Spraying, and High Pressure Airless Spraying?

Brush coating refers to the use of different size and type of paint brush to brush according to the size and type of area to be coated; roll coating refers to the use of a paint roller to brush; air spray is the use of air spray gun, air flow formed by compressed air Through the nozzle hole of the spray gun, a negative pressure is formed, and the negative pressure causes the paint to be sucked from the suction pipe and sprayed by the nozzle to form a paint mist. The high-pressure airless spray is the use of a high-pressure plunger pump to directly pressurize the paint to form a high-pressure paint. An atomized air stream is formed at the muzzle to act on the surface of the object to be coated.

Practical techniques for reducing paint wear

After a certain understanding of the causes of wear of the decoration paint, measures can be taken in a targeted manner to reduce the wear and waste of the paint.

1. Dust foreign objects, cracks, and peelings on the wall surface of the new wall will affect the brushing effect and cause unnecessary wear. Therefore, all dust and other foreign objects on the wall must be brushed off first, and all cracks and peelings must be filled. Stitch and level, while ensuring that the wall is free of saline, greasy, and long ridges. When starting the construction, the neighboring wall should be shielded to avoid spraying paint.

2. Because the old wall has already been treated with foundation, all that needs to be done is to ensure that the wall base is firm. You can use a soda solution to wash the wall first, brush it clean, and then use the child to level the wall.

3, to save the paint, the construction should use brush or roller coating method, and in order to ensure that the cover is flat and smooth, suitable spray gun spray, the need to spray the wall need to be covered in advance.

4. The different selection of nozzles will also affect the degree of wear of the paint. When using a nozzle with a small spray gun, the loss will be lower, and the spraying effect of different brands of spray tools will be different, and the wear of the paint will also be different.

5, the best temperature for the paint construction is 5-40 degrees, the humidity is less than 90%. Spring, summer and autumn are more suitable for wall construction. If spraying method is adopted, the wind speed during spraying shall be less than 6 meters per second, and the supply pressure of air compressor shall be over 60 Newtons.

6, do a good job in construction planning, arrange the construction time, if the time is not enough, blindly seek speed, construction workers may use the deteriorating paint because of the progress and is also not conducive to the quality assurance of the decoration. If it is the owner himself who purchases the paint, he must calculate the required amount of paint according to the floor area of ​​the home.

Coating calculation method

Wall brush paint is generally 1 bottom 2 sides, that is, once again primer, two finishes. The primer must be applied. The reason why the primer is applied first is to provide better mold and moisture resistance, to exert the performance of the topcoat, and to save the amount of topcoat.

The calculation of the amount of paint used is based on the floor area of ​​the home. The standard for coating use is per liter of coating area: 1 liter (1L) latex paint can be brushed about 12 to 14 square meters of wall surface once. A barrel of 5 liters of paint can brush 60 to 70 square meters 1 times. During actual construction, the area that can be painted per liter of paint varies depending on the worker's technique, wall conditions, and product characteristics.

For example, a family has a building area of ​​110 square meters, of which the room area that needs to be painted with a wall coating is about 80 square meters, and the painting area is 80*3 is 240 square meters.

Primer dosage = brushing area & spanide; barrel coating area

Topcoat amount = primer amount × 2

Calculation method of building area, home painting area = (building area × 80% - 10) × 3

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