Second-hand housing and new house paint different, second-hand housing re-painting is a refurbishment process, this is a very vast project, because the second renovation of the wall base is very complex, timber and craft are also different, the wall is also very troublesome to deal with , so the old house decoration wall painting matters a lot. During the construction process, some common problems will also arise. For example, workers are not prepared enough for the construction, the surface is not ground properly, paint is too thin or the paint is too thin, and the brush is too heavy for every reason. Therefore, it is very necessary to understand the precautions for the decoration of the old house decoration wall . If you have this need, you may wish to follow me to learn about it!
Old house decoration wall plaster note
We make different construction plans according to different building subjects.
First, the interior and exterior walls of a new building are generally divided into: A. The main body is cleaned up. B, putty. C, sandpaper smoothing. D, closed primer on one side. E. Apply on both sides.
Second, the renovation of the old building interior and exterior walls are generally divided into: A, first deal with the building walls clean, after repair. B. At the end, the primer and paint are applied according to the conditions. (The above is only for Party B to provide the construction plan unilaterally. The specific construction plan shall be based on the actual site conditions and Party A's requirements for construction.)
Exterior wall paint construction plan:
First, the substrate requirements:
The basic requirements for the coating surface of architectural coatings - dry, firm and clean.
1. Drying: The cement wall surface is maintained for at least 1 month (7 weeks in winter) and above, the humidity is lower than 6%, the humidity of the wood surface is lower than 10%, and there are no structural problems such as water seepage and cracks on the wall surface.
2. Firm: There is no powdered loose material. There is no loose paint on the old wall.
3. Clean: No oil, grease, mildew, algae, and other adherents.
Substrate does not meet the requirements will seriously affect the film performance. Humidity in the wall may cause blistering, peeling, peeling of the paint film, as well as alkali penetration on the walls, loss of light on the paint film, or even mildew. The looseness of the substrate and dirt will affect the adhesion of the paint film, resulting in peeling, peeling, etc. Phenomenon occurs, if there is mold breeding, it will also cause paint film mold.
Second, the substrate processing:
1. New wall surface. Maintenance for more than 1 month, humidity <6% (hygrometer test can be used) to remove floating stains and seep alkali.
2. Old wall surface. High-pressure water washing or mechanical grinding to remove dust and possible algae growth, cleaning and drying, it is necessary to brush anti-mildew solution (alkaline powder can be formulated as a 10% solution), and then rinse with water; the old coating is intact, clean The surface can be recoated directly; the old coating is powdered, blisters, cracked, peeled off, and the old coating must be removed to repaint the primer and paint twice.
3. Use wallpaper wall surface. The wallpaper can be peeled off, the glue can be washed, dried, and the paint can be applied after proper treatment according to the condition of the wall.
4. Glass fiber surface. Can be painted directly.
5. wood. The surface removes or replaces worn and decayed parts, cleans the repaired surface, and the joint between the door, window, and wall is covered with a resilient filler.
6. Metal surface. Iron: Should first remove the surface rust, to be cleaned immediately after the appropriate anti-rust primer; non-ferrous categories: remove the surface of oil, oxide, etc., and brushing to increase the adhesion of the primer.
Third, wall treatment:
1. If the wall is flat, it is recommended not to use putty.
2. If putty is used, thin batches are not suitable for thick brushing.
3. The requirements for putty should not only be easy to batch and easy to polish, but also should have good strength and durability. For exterior walls, kitchens, and bathrooms, the requirements for putty should have better adhesion, bond durability, and water resistance.
4. Possible problems with the wall: Dust, powder - outdoor high-pressure water can be used to clean, indoor use wet cloth to wipe; grease - use neutral detergent cleaning; mortar - use shovel, scraper, etc.; mold - outdoor Rinse with high pressure water, scrub in room with bleach for a few minutes, rinse with water and dry.
Fourth, construction conditions:
Latex paint is a water-based paint and requires high maintenance and construction conditions. The construction maintenance temperature is higher than 5°C and the ambient humidity is lower than 85% to ensure good film formation. The low temperature will cause problems such as powder cracking of latex paint, and the environmental humidity Ambassador paint film will not dry for a long time, and eventually lead to poor film formation. External wall construction must take into account weather conditions. Before applying latex paint, it should not rain for 12 hours to ensure that the substrate is dry. After brushing, it cannot rain for 24 hours and the paint film can be washed out by rain.
Fifth, coating system:
The general exterior wall paint coating system is divided into three layers: primer, middle paint, and topcoat.
1. Primer. The primer seals the wall surface to be alkaline, improves the paint adhesion, and has a great influence on the top coat performance and surface effect. If you do not use primer, the adhesion of the paint film will be weakened, and the effect of the alkaline paint on the wall will be even greater. In particular, the bottom surface of the white cement putty may cause problems such as powdering, yellowing, and alkali penetration of the paint film. , Destroy the paint performance, affect the life of the paint film.
2. In the paint. The main role of paint is to improve adhesion and hiding power, provide three-dimensional pattern, increase fullness, and reduce the amount of finish paint.
3. Topcoat. Topcoat is the last coat in the system, with decorative features and resistance to environmental damage.
Six, painting skills:
To achieve good painting results, skilled operation levels are needed, but the construction of latex paint is not difficult. First of all, the requirements of the substrate should be clean, dry and firm. According to the operating instructions, the coating conditions are suitable and the dilution ratio is accurate. Excessive dilution will cause the coating not to cover the bottom and powder, and the glossy coating will lose light and have different colors. Second, good construction tools are also necessary.
The order of painting of the exterior walls shall be top and bottom, from the roof, gutters, column tops, beams and rakes to walls, doors, windows and floors. Each of these parts must also be brushed from top to bottom. When brushing each part, you can't pause halfway. If you have to stop, you must choose the original connection part of the house structure, such as the junction of the wall and the window frame.
This will avoid unsightly seams. When brushing the seesaw, it is divided into the following two steps: first brush the bottom of the sacral plate, and then brush the sacral area. At the same time, when brushing several sampan plates, move the ladder and follow the wall one by one. During the brushing process, the movement should be fast. From time to time, brush back and forth between the dry and dry joints to avoid leaving a layered or seam. .
Under normal circumstances, the wall paint, basically follow a few routine steps, but occasionally different, such as new houses and second-hand housing paint, in the early wall treatment there will be some access, so when in the renovation , If you encounter second-hand housing renovation, the owner should pay special attention.
New house: Many new houses are clean water rooms, that is, only the interior wall surface is smoothed with cement mortar, that is, there is no house with any interior decoration, or it is a house that only scrapes putty. If it is only plastered with cement mortar, brush When painting, it is necessary to level and scrape the putty before proceeding with the following steps in order. For older houses, the new house is easier to handle.
Second-hand housing: second-hand housing repainting is a refurbishment process, this is a very large project, because the secondary renovation of the wall base is very complex, timber and craft are also different, the wall is also very troublesome to deal with, so pay attention Naturally there are many things.
Paint 1
First, whether the wall paint is to be eradicated
1, short-term: For the purchase of second-hand housing wall, if it is not a long time decoration, then when the wall surface treatment, the original water putty can retain some, do not completely shovel out; with steel brush and sandpaper for grinding the wall Face, you can re-paint latex paint.
2, time interval is too long: If it is more than five years of water putty, due to material aging, in the second brushing, it must be eradicated to the bottom of the wall, otherwise it will affect the future construction quality and decoration of latex paint After long-term use effect.
3, how to clear the wall:
1. Water on the wall: moisten the original wall, save energy when shoveling.
2 Spade: Remove the part of the original wall that has been flooded until the cement mortar wall or putty layer is exposed.
Second, the wall must be fully repaired
For the repair of painted walls, it is generally difficult to achieve the desired effect. Therefore, the owner must repair the wall of the second-hand house when it is refurbished. It is best to repair the wall that has been damaged by the whole wall or Try to choose a larger area for repair as much as possible so that color differences can be avoided as much as possible and the quality after repairing is better.
repair:
1, make up the wall: If the cement wall has cracked or is not strong, you can shovel out, re-use the cement mortar to smooth out, if you can use, you can omit this step.
2, interface agent: wall brushing interface agent, brush interface agent must be brushed, but also brush uniform.
3, cracks: In general, the kraft paper tape and white latex are used to cover the crack (but can not guarantee that 100% will not crack again).
4, leveling: uneven surface needs to be leveled, the general gypsum is more commonly used, concave and convex difference does not exceed 0.5 centimeters.
5, patch: general light walls and insulation walls and other non-load-bearing walls are required to be patched, try to choose a better texture of the wall cloth and white latex, if available, then you can use grid cloth, the relative anti-crack effect will be Better.
Paint 2
Third, pay attention to ventilation after painting
In addition, the second-hand house after brushing paint should also pay attention to ventilation, especially for second-hand old houses, its poor ventilation, xylene ingredients in the diluent will react with the chemical composition of latex paint, resulting in wall yellowing Therefore, it is not enough to strengthen ventilation, and several electric fans have to be placed to enhance ventilation.
How much is a square meter on the stucco wall?
First, we all know that there is a big difference in the price of different wall paints. Therefore, there is a large gap in cost, so the amount of money painted in one square meter is naturally not the same.
Second, the degree of difficulty of the wall, if it is a very worn wall, or some walls are styling and so on, will bring considerable difficulties to the construction, so at this time the price is slightly higher than usual is also common sense in.
Third, the effect of painting the wall is not the same, some friends of the wall painting effect is particularly high, in particular, some high-level hotels, need to be colored paint for painting. Of course, such a stucco wall is certainly not the same price as a normal wall paintbrush.
Fourth, how much money a family home painting stucco wall, remove the wall putty 5 yuan, between the wall curing 2-4 yuan, 7-10 yuan is an ordinary environmental protection material processing, latex paint between 3-20 yuan, because There are too many prices for latex paint. There is no way to enumerate them. You can only rely on what kind of paint the owner chooses and then calculate the coverage rate. Labor costs (approved for putty, wall paint, polishing, and other processes are 15 yuan per square meter, but some companies use labor The fee is divided into grades up to 40 yuan a square meter
Five, suggest that a friend needs to paint the wall, you can refer to the above three points of analysis, as appropriate, give yourself a wall of flour estimated how much money a square meter.
Editor's summary: The wall project itself is a bit complicated, and many of my friends are also inexperienced with the various processes in the decoration. We will introduce new houses and second-hand housing paint points for attention today. I hope that I can help you with renovations or preparations. friends.
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