1. Rain, the damage to the stone is mainly reflected in the external walls of buildings, especially acid rain, winter due to rain or snow formed by the winter thaw phenomenon on the destruction of stone is also very large.
2. Groundwater, the damage to the stone is mainly embodied in the ground stone, if the ground foundation part of the waterproof treatment is not good, or even do not do waterproof treatment, then the harm of groundwater to the stone may be long-term.
3. Installation of water, refers to the stone with cement paste when the water slurry, in the spring and autumn, if the basic concrete is relatively dry, the moisture drying time in the cement slurry needs about 3 weeks, and many did not do the protection or protection of stone paving after the appearance of water spots and rust yellow is the first cause of water in the mud.
4. Domestic water, including clean ground water, toilet water, the water in the heating pipe and so on, the impact of these water on the stone is also Chong ignored, cleaning the ground if water treatment is not, these water will follow the gap infiltration into the plate, we often see some of the ground in the cleaning after a period of time after the plate joints are wet is the reason.