Home decoration manual latex paint quality problem
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1. The top corner is not straight, especially when the top surface is not the same color as the wall.
Usually, the top surface of the cast-in-place is very poor, for example, small spaces and upper sides of the window.
2. The corners of the sun are not straight, causing the corners of the windows not to be right-angled. The sunken corner of the ceiling is also very important.
Solution:
The lower corner of the wall should be shoveled to solve the problem.
Before the construction, preliminary inspections should be conducted on the yin and yang angles on the wall surface, where the problem is found, plaster or other methods.
In front of the batch wall, line up all the corners of the wall and use plaster to look straight.
Use a ruler to handle the corner of the wall.
Latex paint is often leaked where:
Places that are easily forgotten: Corners of ceiling tiles, underneath ceiling tiles, wall coverings on door hinges, outside of bay windows, and behind heating.
Inspection method: Inspection of the corners and the lower part of the ceiling lamp can be observed from the farthest position of the room. For example: Check whether the restaurant's ceiling lamp slot is filled with latex paint. Can you stand in the living room or even on the balcony to see if you have latex paint? If it is a double-storey building, you can stand in the middle of the stairs and carefully check the location of each ceiling lamp. If you find a brush or an inconvenient place, you can find it in time and paint it. During the inspection, it is best to have a worker working with it, using the light to shine on it, and where there is unevenness to see it, so as to prevent the defects in the light tank from being discovered after the lamp is installed. Walls and bay windows are easily forgotten due to their small size. We should check these places carefully. Behind the heating, the same to be painted, there are conditions to brush it again, if you want to pack the heating, but also as much as possible inside the white, because you can see from the outside, and some people even in order to cool the heat, take off the heating cover , if it is not painted inside it is very ugly.
There are many cracks in the ceiling of latex paint:
1. The suspenders of the ceiling are loose and the ceiling is deformed.
After the ceiling frame was formed, all booms were carefully inspected and checked with a stick to confirm that each boom was firmly attached.
2. The seams of the suspended ceiling frame are in the same position as the gypsum board joints.
Photographed the ceiling frame, plasterboard joints should be staggered with the frame joints.
3, gypsum board joints, improper handling of woodworking.
Gypsum board should be fixed on the keel, and fixed with self-tapping, the density of self-tapping at the edge should be slightly larger, controlled within 15 ~ 17cm.
4. Crack prevention measures for gypsum board joints shall not be taken or crack prevention measures shall be taken.
When the gypsum board is installed, a gap of about 3 mm should be left at the joint to prevent cracking. First use plaster and white latex to reinforce, and then use a bandage to brush white latex on the gap, and then grant putty and paint.
Some workers do not wear bandages for lazy reasons. In particular, there is a lot of trouble between the ceiling lamp trough and the top surface. The workers do not handle it.
Latex paint wall area brushing:
The reason for the large area of ​​brushing:
Latex watered too much.
Maintenance, color change caused by color.
The color of two colors can not be absolutely the same.
Improper construction results in a difference in light levels along the vertical surface of the wall.
The base contains a large amount of alkali, making latex paint discoloration.
Solution:
In general, the latex paint should be replenished between 10 and 30 and no more than 40%. And those with special heavy colors can't dip water or paint directly, otherwise it is easy to brush flowers.
The roller is used for maintenance. The brush cannot be used. This causes the brush lines to differ from the roller lines.
Before coloring latex paint, fill a bottle with water bottle for later use. Because the future adjustment will not be able to adjust the same color.
With a large amount of alkali putty, it is necessary to brush the primer again. Lacquer embossed paper is too obvious, no paint film:
Sandpaper problem:
1, sandpaper printing is too thick:
a, putty powder is too thick.
B, sandpaper is too thick
2, latex paint is not covered:
a. The quality of latex paint is too high.
B. Workers have watered too much.
Solution and make-up measures: Use the bulbs to look for the wall and the top surface thoroughly, and all the sand holes and sandpaper marks will be approved again. After grinding, paint again. Latex paint can not be excessive water to ensure that there is enough hiding power.
About the principle of paint film formation: Latex paints contain latex as a binder. They are many small polymer particles suspended in water and in the form of emulsion. When the paint is applied, the water slowly evaporates, and the polymer particles are slowly disturbed. Together, they rely on coalescents to make them stick together to form a complete film. Therefore: A large amount of water in latex paints tends to reduce the density of those polymers, making it impossible to form a complete film.
The surface roughness is not enough, the light is a dozen, it is hard to see:
Reasons for poor wall finish: Most of the painters did not polish the base, or even forgot to polish a place. Some painters do not polish in places where it is difficult or not obvious. The original building structure was much worse, and the painter couldn't make up for it. It was too thick for easy emptying.
The more important places on the wall: various walls, modeling walls. Below all lights, lamp trough, near the main light. Near all switch panels and eye level.
Defects make up: If you haven't painted yet, you can directly polish it and check with a light bulb. After passing the inspection, paint again. If you have already painted the paint twice, you can only scrape the putty, polish it, and paint it again.
Prevention and control measures: The key is to control beforehand, carry out the acceptance in stages, check the wall before putting the putty, and then check after polishing. The paint is not allowed to pass the paint after failure; paint.
The wall has trachoma, through the bottom, impurities, flow falling and other phenomena:
Blisters: After the wall was approved, the walls were covered with sand and pinholes. However, when the wall paint was finished, there were still a lot of trachomas. It was not normal, and it must have been a painter's job. The reason for the appearance of blisters and pinholes after the batch wall may be caused by the air between the putty and the grass. After polishing, these sand holes will be covered by powder. After the first pass of the paint, these sand holes will appear. Therefore, it is necessary to make up for it again. After the final survival, there will be very few blisters.
Through the bottom:
The base layer has dark stains that have not been cleaned in time and latex paint cannot cover it.
Latex paint has low hiding power and may be excessively watered.
Impurities:
The latex paint had impurities and was not filtered during use. Causes too much impurities on the wall.
When doing latex paint, there are many impurities in the air, mostly caused by cross construction. Solution: These impurities are easy to handle, only need to be polished and painted again.
Flow drop: Too much water, improper construction. When looking for a make-up or brush on the top corner, the paint falls on the wall.
The wood is cracked near the wall, other wall surfaces, and shedding wood is often cracked nearby:
Doors and wall joints, cabinets and wall joints, and other woodworking and wall joints.
The reason for the crack:
If it is all the cracks in the carpentry part and the wall joints, it is most likely a painter's problem. When the painter sprayed the wood lacquer, he sprayed the paint on the wall and did not do any protective measures on the wall. Then scrape putty directly on the wall. The putty does not bond with the grass, and finally cracks occur.
If it is a large area of ​​wall cracks: then the reason for the wall, there may be a lot of cracks in the base of the wall, the latex paint cracked.
The strength of the grassroots is too weak, the strength of the scraped putty is large, and the plaster of the base has been cracked. For example: directly scrape putty on 888.
Due to the dirt on the base of the wall, the putty does not combine with the base layer, causing hollowing and falling off.
Treatment and prevention of cracks:
When spraying paint, protect the walls with newspapers. Prevent paint from spraying on the wall.
Cracks on the wall, bandages, or plaster or change the wallpaper.
If the grassroots is 888, you need to shovel 888.
Latex paint surface, powdering, shedding:
1, the bathroom shower side often has water, great moisture, a long time will penetrate the wall, has been infiltrated into the wall of the next room, so the latex paint on the wall next to the mold, foaming, powder, Fall off.
2. When laying bricks, workers will overcast a lot of water on the ground. The water will penetrate the walls inside the corners. It takes a long time for the moisture infiltrating into the wall to dry. When the workers finish the latex paint, the moisture will come out again, and the latex paint must foam and fall off.
3, wall cracks, gypsum board joints, do anti-crack treatment, generally first plaster bandage and then put, then approved putty, sanding, paint. When the gypsum at the base has not completely dried, the workers proceed to the next process. The end result is: latex paint foaming, shedding. Especially in winter, workers will use electric heaters or iodine tungsten lamps to bake gypsum in order to catch up. It is very easy to cause dry skin at this time, rather than completely drying out, which can easily cause emulsion paint to fall off.
4. The seepage of water from the exterior wall to the interior wall, the water seepage through the windows of the balcony, and the prolonged rainy weather may also cause moldy problems with latex paint.
solution:
The wall of the bathroom should be waterproof, height to 1.8m, at least in the shower position to do waterproofing.
When paving tiles, the ground water can not be too much, it is easy to seep water downstairs, but also a lot of water into the wall, causing latex paint damp.
Before painting, be sure to wait until the grass is thoroughly dried.
Use mildew-resistant latex paint and brush primer. The primer protects the top coat. At the same time prevent alkalinization of the topcoat.
Scratch waterproof putty.
After changing the switch and socket panel, the peripheral leakage brush:
The consequences of the switch not being removed:
A wool brush is used around the socket, and the brushed latex paint is different from the wall roller.
Later, when the socket is replaced or repaired, when it is mounted again, black edges will appear around the socket. Because the original socket was not removed, the bottom of the panel naturally did not do anything.
Sockets are contaminated with latex paint all around and scrubbing is troublesome.
Correct construction: When the wall was approved, all the sockets and switch panels were removed and placed in one place. In this way, the painter can handle the wall near the bottom of the wall very well when he polishes it. At the same time, when he paints, he can also handle the bottom box very cleanly. There is no problem in changing the bottom box. . If the switch and socket panel really do not want to be removed, then when doing latex paint, use paper tape to stick around the panel to prevent the paint from contaminating the panel.
The texture of a part of a latex paint differs from the texture of a large wall:
The reason that the lines of a part of a latex paint differs from that of a large wall surface are:
Some areas cannot use rollers (wool brushes are used), and large rollers are used. Causes different lines.
When repairing, use a wool brush to make the maintenance office different from the large surface.
Where are the lines and lines of the big face different? Inside the lamp slot, where the roller cannot reach. Wall Yin corner: roller can not completely roll. Switch panel: Some workers did not remove all the switch and socket panel before rolling paint, and they couldn't use roller paint. They could only use wool brush. Bay window: Generally, the area is relatively small. Workers generally brush latex paint with wool. The lines and big faces that are brushed with wool when repairing are also different.
Make-up measures: There is a small roller that can reach into the inside of the lamp slot. Using him in combination with the roller, the effect is good. When repairing, after repairing, it is necessary to use a roller to roll over a large area. You can't just roll a little, otherwise there is still a color difference. Latex paint can also be sprayed with a spray gun. The effect of the spray is basically no color difference.
Latex paint fades, not scrubbed:
General scrub paint scrub resistance parameters: thousands to tens of thousands of times, while the country requires at least 1,000 times. The scrub resistance refers to the number of reciprocating rubs on a standard latex paint board with a specified brush on a designated scrubber. It reflects the denseness and anti-pulverization of the paint film surface.
Latex paint is not resistant to scrubbing or discoloration:
The paint failed: the paint was inferior and the scrub coefficient failed to reach the national standard.
Inappropriate application of qualified paint will cause discoloration. Excessive watering of emulsion paint will destroy the filming physical properties of the paint. Makes scrub-resistant latex paint intolerant of scrubbing. Inspection method: After the latex paint is finished, wipe it with a clean hand on the wall to see if there is any coating on the hand. High-quality paint will not be out of paint.
Control measures: First of all, the acceptance of latex paint must be the contracted brand and model. Watering ratio of latex paint during construction. Control at 20% to 30%.
After installing the skirting board and the top corner line, I found that the wall is uneven:
Some workers generally pay more attention to large surfaces during the wall-washing process, and often overlook the top surface, inside corners, and the baseboard position. It is also troublesome to troubleshoot and polish the walls in these locations. The corners of the kickboards are uneven, and the finished baseboard is twisted along with the wall; either the kickboards are straight, but there is a gap with the wall. It is also very ugly. Since it was not easy to find problems before installing the wooden finished baseboards, the construction party settled them after they were completed. When the owners installed the wooden floor and baseboard, they found that the wall was uneven. At this time, coordination with the construction party was a little passive. Similar situation: The installation of the top corner line, if the top corner is not straight, the top corner line must also follow the distortion.
Solution: Before the top corner line is installed, the inside corner will be elasticized and the plaster will be straightened. After qualifying, make a vertex line. After the wall is polished, check the position of the baseboard with a two-meter ruler before brushing the latex paint. If there is no two-meter ruler, use a relatively straight light-gauge steel or wood strip for inspection.
There is still a big gap between the door line and the wall:
the reason:
The wall is not vertical, the door line is vertical, and the painter does not do anything, resulting in gaps between them.
The doorway line was not vertical and there was a gap between them.
The door line is perpendicular to the wall, but the door cover is wider than the wall, so there is a gap between them.
The door line and the wall are vertical, but the door cover and the wall are not parallel, resulting in a tight side of the door cover, a gap on one side.
General worker's handling: After the general construction process, after the carpenters are completely finished, the painter enters the field again, and the gap between them is not dealt with in advance, which makes the post-processing more troublesome. Therefore, the worker directly used putty to block the gap between the door line and the wall, so that the putty and the side of the door line (1cm plane) in a plane, these two materials in the same plane, either do paint or latex paint, No matter what they do, gaps between them may crack in the future.
The correct way to deal with it: After the woodwork is used as the door base layer, if the gap between the door pocket line and the wall surface is found to be large, handle it in advance: re-do the door pocket or do vertical treatment on the wall surface. The advantage of this is that the door line is affixed to the wall and the installation is more secure. There is no gap between them and there will be no cracks in the future.