It is necessary to follow strict decoration technology and process to decorate the self-built ceramic tile exterior wall into a painted exterior wall.
1, grassroots processing.
In the past, the first step in the renovation of old tile walls was to ask a special brick-knocking demolition team to knock off all the old tiles first, which was time-consuming and laborious. Now with the interface agent for tile surface renovation, the treatment efficiency of the base is greatly improved. It can be directly coated on the smooth old ceramic tile, quickly penetrate into the interior of the ceramic tile, and form a rough interface with certain toughness on the surface of the ceramic tile, thus improving the bonding strength between the coating such as putty and the base surface. (PS: Before roller coating the interface agent for ceramic tile surface renovation, flush the floating ash and oil stain on the ceramic tile surface with high-pressure water; Empty drum, delamination and other damaged parts should be removed locally and repaired and leveled with cement mortar)
2, putty leveling
Scrape the special putty for external wall on the rough interface agent coating for leveling. What needs to be reminded here is that special putty for external walls must be used. Outdoor environment, such as wind, sun, rain, high temperature baking and low temperature freezing and thawing, requires much higher water resistance, crack resistance, alkali resistance, mildew resistance and weather resistance than indoor decoration putty.
Exterior wall putty generally survives for 2-3 times, and the scraping thickness of each batch should not be too thick, so as to avoid cracking of putty layer due to too high drying shrinkage strength. If master's special putty for exterior wall is used, the scraping thickness of each batch should not exceed 65438±0.5mm, and the total scraping thickness of putty layer should not exceed 3 mm The scraping time of putty before and after batch should not be too long, and the putty surface should be dried before coating, and the putty layer should be polished in time after drying.
3. Apply permeable sealing primer
Sealing primer can seal the alkalinity of the wall, adjust the permeability of the bottom layer and increase the adhesion of the exterior wall paint, so you can't save trouble and brush without brushing.
4. Exterior wall coating
The choice of exterior wall paint can be based on the desired effect to decide whether to use real stone paint, imitation stone paint or liquid granite. For the choice of color, it is suggested to coordinate with the surrounding environment and the selected cultural stone; Avoid being too bright, because the color retention of bright exterior wall coatings is a test for big brands and it is easy to fade; You also need to consider local customs or feng shui.
Finally, for exterior wall decoration, special attention should be paid to weather forecast to avoid construction before rain and snow. The right time, the right place and the right person can successfully paint the old tile self-built house with beautiful new paint, thus striving for value!