Coating knowledge: coating winter construction scheme for exterior wall engineering

Core tips: in winter, the weather turns cool, cold, rainy, humid and other climatic characteristics appear, and the temperature drops obviously At this time, the exterior wall coating project will encounter many Wall problems during construction How to solve the problems in winter construction of the exterior wall project is as follows: first, the winter construction conditions and requirements for coating construction, the qualified base has five basic characteristics Properties: firm, flat, dry, neutral and clean As for the requirements of coating construction conditions, the construction environment temperature shall be controlled above 5 ℃ and the environment humidity shall be controlled within 85%, otherwise, the construction is not allowed 2、 Coating construction conditions and requirements for the construction of exterior wall coating Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: in winter, the weather turns cool, cold, rainy, humid and other climatic characteristics appear, and the temperature drops significantly At this time, the exterior wall paint project will encounter many Wall problems during construction How to solve the problems in winter construction of the exterior wall project is as follows: 1 Winter construction conditions and requirements For coating construction, the qualified base has five basic characteristics: firm, flat, dry, neutral and clean As for the requirements of coating construction conditions, the construction environment temperature shall be controlled above 5 ℃ and the environment humidity shall be controlled within 85%, otherwise, the construction is not allowed 2、 Coating construction conditions and requirements for the construction of exterior wall coating, some projects still need to be constructed when the temperature is lower than 5 ℃ after entering winter due to the requirements of construction period In order to ensure the construction quality, the following matters shall be paid attention to during the construction: 1 Basic level inspection and treatment: Base course treatment is the basis of coating engineering The content of base course treatment includes: removing dust, oil stain and loose matters on the surface of base course; reducing or eliminating surface defects; improving the physical or chemical properties of base course surface In winter construction, when the humidity of the base material is too high and the temperature is too low, many parts of the cement base material will turn white When the drying of the bottom layer is not easy to judge, the general plastering mortar is a new base material, and the maintenance period is more than 14 days in winter 2 Putty Construction: For the construction of coating system, before the construction in winter, the base material shall be dry and the wall surface temperature shall be ensured When the daytime temperature is lower than 5 degrees, the construction shall be carried out on the wall with direct sunlight as far as possible, and the time for going to and from work shall be controlled as much as possible between 9:30 in the morning and 3:30 in the afternoon The construction of the shady wall shall be controlled after 11:30 in the morning and 2:30 in the afternoon The construction shall be carried out during the period with high temperature, and the minimum temperature at night shall be higher than zero, otherwise, the construction cannot be carried out to avoid the putty layer being frozen 3 Polish the putty and judge the drying condition: the putty can only be polished after it is completely dry, so that the putty can be polished after it is completely dry without adhering to sandpaper and controlling the surface flatness If the putty is not dry or frozen, the phenomenon of putty sticking to sandpaper will appear during polishing, and the surface is not easy to polish 4 coating construction: before painting, make sure that the substrate is completely dry The construction temperature of the waterborne coating should be controlled at more than 5 degrees When the temperature is below zero, the emulsion will be frozen and demulsifying, and the bonding and film forming function will be lost When the natural environment temperature is lower than 5 degrees, the wall construction with sun irradiation shall be selected as much as possible The construction time of each day shall be controlled between 9:30 a.m and 3:30 p.m., and the construction of the shady wall shall be controlled between 11:30 a.m and 2:30 p.m., which is the period with high temperature When the natural environment temperature is lower than 5 ° C and the minimum temperature at night is lower than 0 ° C but not lower than - 5 ° C, single component oil-based acrylic primer oil-based acrylic top coat can be selected Due to the temperature, the oil-based coating will dry slowly in the film-forming process, so the recoating time shall be at least 24 hours before the construction of the next process 5 Coating storage: when entering winter coating construction, the coating stored on site shall be placed in indoor classification and stacking Oil coating and water coating shall be stacked in different areas, not in the same room, and the indoor temperature shall be above zero When the temperature is lower than zero, heating or electric heating shall be used to raise the indoor temperature It is strictly prohibited to use open fire to raise the indoor temperature The unused paint in construction shall be placed indoors, and the frozen product shall not be reused 6 Film maintenance and finished product protection: the time for the film to reach dryness and optimum performance on the surface of the object It takes 7 days at 25 ℃ under the standard temperature, When the temperature of coating construction environment is generally low in winter, the time for drying and achieving the best performance of the paint film should be relatively prolonged During this period, the pollution and bump on the surface of the paint film should be reduced as much as possible to avoid the overall effect of the repair caused by pollution and bump When entering into winter construction, corresponding protective measures shall be taken according to the construction conditions of the site to avoid the film being frozen as far as possible To ensure the smooth progress of project coating quality and construction progress Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,