How to scrape a white lime wall

Blow putty is one of the common decoration, that is, blow putty on the wall to make the wall flat and beautiful. The methods of scraping putty on different walls are different, but the putty will fall off and burst after a long time. These problems are all caused by improper putty scraping process. Today, Bian Xiao will introduce you to the method of scraping putty on the lime wall.

Lime wall putty scraping

Lime wall putty-lime wall putty scraping method.

1. Base treatment: Due to various reasons, such as floor, materials, isolation agent, etc., the flatness of the existing lime wall is poor, and there are many phenomena such as pores, honeycombs, pits, unsmooth angle of yin and yang, arching, etc. Therefore, the convex parts should be polished and leveled, and the concave parts should be filled in. For precast concrete floor slab and slab joint base, it must be painted by special person with wire brush to remove impurities such as floating sand, bumps and dust on the surface. The grey surface of cement mortar paper reinforcement requires the surface base to be dry, solid and clean (no floating soil and oil stain).

2. Repair at the grass-roots level: After the joints of concrete roof panels are cleaned, the gypsum putty shall be leveled and compacted with a steel scraper for the parts with large defects such as honeycomb, and leveled and erected horizontally (the top surface with smooth surface is not scraped). The proportion (weight ratio) of gypsum putty is gypsum: emulsion: cellulose aqueous solution (concentration 5%) = 100: 5 ~ 6: 60. Brush caustic soda solution: brush twice with 5% caustic soda solution and once with 10% concentration. Rinse with clear water immediately after brushing, and then proceed to the next process after drying.

3. Coating adhesive (juice slurry): Before scraping putty, spray a layer of adhesive, which must be uniform. The proportion (weight ratio) of non-leakage adhesive is clear water: emulsion = 100: 15 ~ 20. Scraping putty: Scrape putty back and forth with a steel scraper. Pay attention to the top, bottom, left and right. The space between the two scrapers should be clean, and floating putty is not allowed. When scraping putty, it is necessary to prevent it from being stained with or mixed with sand. The proportion (weight ratio) of white putty is: white powder: talcum powder: cellulose solution (concentration 5%): emulsion = 60: 4o: 75: 2 ~ 4.

4. Repair and polishing: After scraping the putty for the first time, the parts that have been repaired first should be re-inspected. If there is any problem, the collapsed part should be repaired and leveled with putty. After the putty is dry, it should be polished, smoothed and swept with sandpaper.

5. putty survival: scrape the white putty twice, and scrape it again after the first putty is dry. It is generally required to survive at least twice. It is required that the surface is not only flat, but also uniform in texture and texture, otherwise it is easy to have inconsistent colors and affect the decoration effect.

Putty Scraping on Lime Wall —— Key Points of Putty Scraping on Lime Wall

If you used to brush lime or paint, if you want to brush latex paint now, you must first remove the original wall and scrape putty again. The quality of roller brush must be good, the length of wool is moderate and the density is uniform, which affects the painting effect. Paint the ceiling first, then the walls. Be sure to dry it the first time and brush it next time. Force evenly. Brush the light color twice. If you want rich colors, brush them three times before they are even.

Today, Bian Xiao introduced many methods of scraping putty on the lime wall. I believe everyone has a further understanding of putty scraping on lime walls. In fact, putty scraping is carried out according to certain steps, which are indispensable. So when scraping putty, there are many places to pay attention to. If it is not scraped well, putty will easily fall and burst.