Exterior wall engineering coating winter construction program

China Paint Online News Information: Into the winter, the weather cool, cold, rainy, humid and other climatic characteristics appear, the temperature dropped significantly, when the external wall paint project in the construction will encounter a lot of wall problems, how to solve the external wall project in the winter construction problems, as follows:
1, winter construction conditions and requirements
for paint construction, qualified grass has five basic characteristics: solid, flat, dry, neutral, clean. And for the paint construction conditions requirements; Construction environment temperature must be controlled at more than 5 degrees, environmental humidity control within 85%, otherwise it is not possible to construct.
II, paint construction conditions and requirements
for the construction of exterior paint, part of the project due to the duration requirements into the winter when the temperature is less than 5 degrees still need to be carried out, in order to ensure the quality of construction, construction period should pay attention to the following matters:
1. grass-roots inspection and treatment:
grass-roots treatment is the basis of coating works, grass-roots treatment includes: removal of dust on the grass-roots surface, oil, loose materials; Mitigate or eliminate surface defects; Improves the physical or chemical properties of the base surface. Winter construction when the substrate humidity is too low temperature, cement substrate many parts have whitening phenomenon, the bottom of the drying is not easy to judge, the general surface mortar new substrate, maintenance period of winter for more than 14 days.
2. Putty construction:
for the construction of paint systems, before entering the winter construction should ensure that the substrate drying and wall surface temperature, when the daytime temperature is less than 5 degrees, as far as possible in the direct sunlight on the wall construction, commute time as far as possible to control at 9:3 a.m. After 0 and before 3:30 p.m. to carry out construction, the construction of the vulfer wall should be controlled after 11:30 a.m. and before 2:30 p.m. this period of high temperature construction, the minimum temperature at night should be higher than zero degrees, otherwise can not be constructed, to avoid putty layer frozen.
3. Polish the putty and judge the drying condition:
putty must be completely dry before polishing, so that the putty is completely dry after polishing non-stick sandpaper and surface flatness control. If the putty is not dry or frozen, when polishing will appear putty sticky sandpaper phenomenon, the surface is not easy to polish flat.
4. Paint construction:
coating to confirm that the substrate is completely dry, water-based paint construction temperature to be controlled at more than 5 degrees, in the drying process when the temperature is below zero degrees when the emulsion will be frozen milk, loss of bonding and film-forming function, to ensure that the minimum temperature in the process of film drying can not be lower than zero degrees. When the natural environment temperature is below 5 degrees of construction, as far as possible to choose the sun-dreient wall construction, the daily construction time should preferably be controlled between 9:30 a.m. and 3:30 p.m., the construction of the negative wall should be controlled at 11:30 a.m. and 2:30 p.m. during the warmer time of the construction. When the natural environment temperature is less than 5 degrees, the minimum temperature at night is below zero degrees and not less than minus 5 degrees, you can choose a single component of oily acrylic primer oily acrylic finish, because of temperature reasons oily coatings in the film process will dry slowly, so the re-painting time is at least 24 hours after the next process can be carried out.
5. Paint storage:
into the winter paint construction, the 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, the temperature below zero when heating or the use of electric heating to raise indoor temperature, the use of open flame to raise indoor temperature. Paints not used during construction should be placed indoors and frozen products will not be used again.
6. Paint film maintenance and finished product protection:
coating film on the surface of the object to achieve drying and optimal performance of the time, the standard temperature of 25 degrees C needs 7 days, for the winter paint construction environment temperature is generally low, paint film drying and the best performance time to be relatively extended, during this period to minimize the paint film surface pollution, bumping, to avoid pollution, bump caused by repair effect overall effect. Into the winter construction should be in accordance with the construction conditions of the site should do a good job of the corresponding protective measures to avoid coating film freezing. To ensure the quality of the project coating and the smooth progress of the construction.