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How is putty layer craze caused, how should handle?
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[Abstract]:
Solutions:
A. small cracks caused by dry and wet, temperature change or over-thickness scraping: it can be polished and brushed with wall occlusion to control the thickness;
B. For the big crack caused by excessive scraping, remove the wall brush occlusion and then proceed with putty;
C. For the big crack caused by the wall cracking, remove the post-painted wall occlusion, paste the grid cloth, and then conduct putty scraping. If the wall crack is large, the wall shall be treated;
Putty cracking reasons are various, there are external reasons, there are internal reasons. Externally, the dry and wet changes form the dry shrinkage crack; Temperature change and cold shrinkage cause temperature crack; Deformation of wall structure caused by static load structural cracks. From the inside, product quality, construction technology (batch scraping thickness, interface processing), maintenance mode and many other factors may cause putty cracking.
Solutions:
A. small cracks caused by dry and wet, temperature change or over-thickness scraping: it can be polished and brushed with wall occlusion to control the thickness;
B. For the big crack caused by excessive scraping, remove the wall brush occlusion and then proceed with putty;
C. For the big crack caused by the wall cracking, remove the post-painted wall occlusion, paste the grid cloth, and then conduct putty scraping. If the wall crack is large, the wall shall be treated;