In the construction of interior decoration, proper special tools must be used for painting. There are generally brush painting and roller painting,these two methods of painting have their advantagesand disadvantages.

The answer is to use both, but in different places.
The upper and lower corners of the house should be treated with a light brush. It is better to use a brush. Because of its unique appearance, the roller is better for painting large surfaces, which not only saves effort, but also paints an even area. It is worth noting that during the brushing process, you should use the brushing from top to bottom and then bottom to top in one direction, and do not roll back.
In addition, try not to use only the brush to paint the wall paint, because it is difficult for the paint brush to control the amount of wall paint, and the effect of painting is difficult to guarantee.
The root of the wall is close to the ground, and there is a lot of dust. Once the roller is stuck, it is more difficult to handle than the brush. In order to ensure the overall painting effect of the wall, two tools have to be used separately.