Exterior wall paint autumn and winter festival construction precautions

In the second half of the year, it is the peak period of decoration, however, some construction sites are in a hurry, the temperature is below 5 degrees Celsius or snowy weather is still under construction, which hides a great risk. In winter, the temperature is relatively low, coupled with abundant rain, humid air and other phenomena will lead to the winter wall construction difficulties, especially in the north of the sub-zero several degrees of construction, putty layer is easy to freeze. In order to ensure the quality of construction, during the construction period should pay special attention to the following matters:
1, winter wall construction pay attention to the wall grass-roots inspection and treatment

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In the winter decoration when the grass-roots treatment will encounter excessive humidity, temperature is too low, cement substrates have more white phenomenon, at this time the bottom of the drying is not easy to judge, the general surface mortar new substrate, maintenance period of more than 14 days in winter. Grass-roots treatment is the basis of coating engineering, the grass-roots treatment includes the removal of dust, oil, loose material on the grass surface, reduce or eliminate surface defects and improve the physical or chemical properties of the grass-roots surface. Therefore, the first step in the winter construction process is to do a good job of grass-roots inspection and processing.
2, winter exterior wall construction pay attention to putty construction.
the paint system enters winter, the coating system should be dried and the surface temperature of the wall should be ensured before construction. When the daytime temperature is below 5 degrees Celsius, try to work on the wall with direct sunlight, the construction time as far as possible after 9:30 a.m. and before 3:30 p.m., the construction of the negative wall should be controlled after 11:30 a.m. and before 2:30 p.m. this period of high temperature time, the minimum temperature of night construction should be above zero degrees Celsius, so as not to freeze the putty layer.
3, winter outer wall construction polishing putty to judge the drying situation.
the winter construction, we must pay attention to wait for the putty to dry completely before polishing, in order to polish non-stick sandpaper, at the same time to control the surface flatness. If putty is not dry or frozen, sanding will appear putty sticky sandpaper phenomenon, the surface is not easy to polish flat.
4, winter exterior wall construction attention to the construction of paint.
to confirm that the substrate is completely dry before coating, water-based paint construction temperature should be controlled above 5 degrees Celsius. In the process of drying the film, when the temperature is below zero degrees, the emulsion will be frozen and broken milk, loss of bonding and film-forming function. When the natural environment temperature is below 5 degrees Celsius, as far as possible to choose the sun-dreient wall construction, the daily construction time is best controlled after 9:30 a.m. and before 3:30 p.m., the construction of the negative wall should be controlled after 11:30 a.m. and before 2:30 p.m. this period of higher temperature time.
5, winter exterior wall construction pay attention to the storage of paint.
Into the winter, the construction site storage of paint should be unified placed in the indoor classification code, oily paint and water-based paint to partition code, can not be placed in the same room, and ensure that the indoor temperature above zero degrees Celsius. Heating is required to raise the room temperature when the temperature is below zero degrees Celsius, but no open flames can be used. Unused paint during construction should be placed indoors and frozen products should not be used again.
6, winter exterior wall construction pay attention to paint film maintenance and finished product protection.
coating film on the surface of the object to achieve drying and optimal performance of the time, in the standard temperature, 25 degrees Celsius needs 7 days, winter construction environment temperature is generally low, paint film drying and to achieve the best performance of the time to be relatively long, during this period to minimize the paint film surface pollution, bump, to avoid pollution, bump caused by repair effect on the overall effect. Winter construction should be in accordance with the construction conditions on site, do a good job of the corresponding protective measures, try to avoid the coating film frozen, to ensure the quality of coating and construction progress smoothly.
construction of external wall coating, in order to achieve good coating quality, it is necessary to strictly follow the requirements, pay attention to the temperature and humidity at the time of construction, and in accordance with the normal construction process construction, in order to get good coating quality.
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