Reasons for serious water loss of glass wool cloth plastering surface

According to the results of the sampling inspection report of the cement polystyrene board of the National Construction Engineering Quality Supervision and Inspection Center, the water absorption rate exceeds its product technical index (<30%) by 49.20%, and the minimum is 38.20%. Such a high water absorption rate of this board, Before plastering, it is technically required not to water, resulting in a large amount of water loss on the plastering surface layer, which aggravates the drying shrinkage of the surface layer.