As we all know, doors and windows are the key objects in the decoration of old houses. When dealing with doors and windows, it is necessary to decide the treatment method according to the aging degree of doors and windows. If the wooden doors and windows are peeled and deformed, it indicates that the characteristics of the wood itself change and must be removed and redone; If the paint film on the surface of the steel doors and windows is peeling off, the main body is rusted or cracked, it must be removed and redone; if the wooden doors and windows are made of compact materials and the paint film on the surface is intact, they can be pasted with decorative panels during the second construction and used; If the second-hand house doors and windows are made of solid materials, and you also like their styles, generally speaking, as long as the paint is repainted, it will be refreshed. The following is a brief introduction by the editor to some matters needing attention and construction points of wooden door renovation.
A problem that everyone will pay attention to when renovating wooden doors is that the wooden doors originally used oil paint or water paint. If similar paint is not used during the renovation, whether the quality will be very poor. Experts say there is no need to worry about this problem.
If the surface of the wooden door is damaged, for example, there is a crack or a pit in a certain place, Putty should be added to the damaged place first, then sandpaper should be polished, and then primer and topcoat should be brushed.
The base material does not hurt the overall situation
As for the renovation of wooden doors, everyone will pay attention to the problem that wooden doors originally used oil-based paint or water-based paint. If similar paint is not used during the renovation, whether it will lead to poor quality. Experts say there is no need to worry about this problem.
It should be noted that if the wooden door is renovated, the longer the first painting time, the better. Because the original substrate has been dried out during the renovation, it will not affect the re-sprayed paint film. If it is a wooden door just bought, it is recommended not to spray it first. Because if the smell is very strong, it means that it is not dry, resulting in worse adhesion of the paint film.
Generally speaking, there are three types of oil paint, polyester paint, nitrocellulose lacquer and alkyd paint. Alkyd paint is an earlier product, which works slowly and is used less and less in decoration. Nitrocellulose lacquer dries fast but the paint film is thin, which needs to be brushed many times, and the humidity is a big one, which is easy to bright white. Polyester paint is used relatively more, film forming is fast and the effect is good.
If the original paint is used, you can consider using the same paint or water paint. Generally speaking, the adhesion of the same paint will be relatively good, with the exception of polyester paint. If the original polyester paint is brushed, and then the polyester paint is brushed later, the original paint film needs to be melted before it can have better bonding force. One problem that this kind of renovation will produce is that the adhesion between the renovated paint film and the original paint film will not be very good. If the new film is damaged, such as being cut by sharp tools or breaking out a pit, pulling along the crack or pit will lead to peeling of the two surface layers. However, water-based paint is relatively more environmentally friendly, and wooden doors are mostly renovated indoors. The smell of oil-based paint is relatively strong and difficult to volatilize. We recommend that you use water-based paint for renovation.
Sand-papering repair damage
If the surface of the wooden door is damaged, for example, there is a crack or a pit in a certain place, Putty should be added to the damaged place first, then sandpaper should be polished, and then primer and topcoat should be brushed.
If the grassroots is not damaged, direct painting can be considered. The correct process is to use the original wooden door sand-papering times, and then directly brush the primer and topcoat. Because the finished doors are generally waxed and there will be grease on the surface. After being polished once, the adhesion of the paint can be improved. There is no difference in quality between the renovation and the first painting, so don't worry about shorter life span or other quality problems.
Dark clear oil is not easy to cover
Since any substrate and material can be redecorated, however, if the original use is clear oil and the color is dark, it cannot be covered with light paint, unless the original color is covered with a deeper color, if the original color is mixed with oil, there is no limit on the color, and you can change it to any color.
Three key points for construction
For the effect after film formation, the quality and construction of paint will have certain influence. Oily paint is generally good, and normal construction is OK. Usually in the construction of water-based paint, workers are prone to make the following mistakes, affecting the construction effect. 1. The water is not correctly mixed according to the instructions, and the amount of water exceeds the reasonable ratio, which will affect the film forming effect; 2. Generally speaking, paint two times primer and three times topcoat, however, it takes 4-6 hours to brush the paint for the second time each time. In order to make a quick picture, workers brush the paint for the second time every 1-2 hours. The paint film is not dry thoroughly, which affects the final effect; 3. During construction, workers will use flint glass paper for the sake of quick drawing, but they should use fine sandpaper, which is more delicate and has better adhesion of paint film.
Experts also suggest that since wooden doors are mostly renovated indoors, it is better to unload the doors and put them in a special room for spraying. First, there is no dust, reducing environmental pollution; Second, you can see the front and back of the door very clearly. If spraying directly on the door, fog will easily occur when spraying, which will affect the line of sight, thus affecting the spraying effect.
Editor: China Door Industry Network-dog thief
