Code for application of exterior wall coatings
Source: Author: release time: 2016-09-11 clicks: 19
Building exterior wall coating is a common decorative material for exterior walls. It is easy to construct, weather resistant, beautiful and has waterproof function. There are many problems to be noticed in the use of exterior wall coatings. If they are not used properly, they will seriously affect the function. Next, we invite experts to introduce the application specifications of building exterior wall coatings in the construction process.
Specification for building exterior wall coatings: wall treatment
Clean up cement, dirt, dust and rubbish on the wall, and deal with mouldy parts. Polish the wall to ensure that the putty is firmly bonded to the wall.
Specification for building exterior wall coatings: a full batch of putty.
When the putty is embedded, it is requested to make thin batches as far as possible, from right to left, or from bottom to top. When the Yin and Yang angles are inserted, the elastic line and the suspending line should be used. Be careful not to have connectors when inserting. Roll up the layer and pay attention to the degree of adhesion with the wall, prevent skin peeling. Once the scraping layer is not too thick, otherwise it will be difficult to dry and crack easily. When the putty is scraped, the putty plate is held on the left hand side and the scraper is used in the right hand. When scraping putty, press the scraper firmly, so that the scraper and material surface can be slanted to a certain angle, and scrape along the surface. The main method is to apply the scraping and scraping method to the surface of the flat surface. First, put the putty on the edge of the plane into a line. The blade is pushed to the front at a 30-45 degree angle and will be greasy and scraped to the lower part. The excess putty is pressed into a right line on the right side of the knife edge. When the blade is scraped to the front end, the tip of the knife is turned back to 30-45 degree angle to scrape back, and the putty is scratched in another depression, and the excess is greasy to form a line on the right side of the blade. In this way, the purpose of filling the whole surface is achieved. Or use a one-sided scraping method, that is, scrapers only scratch on one side.
Specification for building exterior wall coatings: grinding
After putty drying, grinding. Scaffolding and wall connection points should be rubbed up and down. Full batch of second putty, polished. Check the wall condition, repair the local unevenness, and polish the putty after drying. After the above process is completed, wall inspection shall be carried out, and the primer will be painted after achieving excellent flatness.
Specification for building exterior wall coatings: primer construction
When the roller is used to brush the outer wall, the roller must be pressed to ensure that the fine parts can be rolled to ensure that the brush is in place. The edge and drip eaves should be thicker, and corners and other rollers are not easy to construct. First use the brush and then use the roller. After the coating is dried, the appearance of the wall after painting is uniform with uniform color and no leakage, indicating that it has been painted in place.
Specification for exterior wall coatings: topcoat construction
When using the hair roller to brush the surface of the head, it is necessary to press the roller properly to ensure that the fine parts can be rolled to the surface without bubbles or materials. When using the roller to brush the second surfaces, it is necessary to press the roller properly to ensure that the fine parts can be rolled evenly until the force is uniform. The coating dosage and distribution surface should be uniform and uniform, without bubbles and knurling. Strictly control the operation of hand to ensure uniform and appearance. The coating construction is carried out from the top to the bottom of the building, and each painting is bounded by grid joints or the intersection of the Yin Yang corner of the wall. After coating drying, close observation of wall coating, whether there are needle holes, small bubbles and other defects. Observation of the wall after painting, if there is no missing parts, uniform color, indicating that has been painted in place. If you have a skin, use a small knife to scrape a small piece of paint film down, observe its undercoat surface, such as smooth finish, it shows that adhesion is not enough. If there is too much dust or mold on the base coat, it indicates that the base surface is not treated according to the standard.