Generally speaking, the ground must be kept dry before waterproofing, otherwise it will not be waterproof.

Some waterproof materials are waterproof even when they are wet. If it is SBC 120 or cement mortar mixed with waterproof powder, there is no problem. It is a hydraulic material. If it is a little wet, it will be beneficial to the later health care.

But if it is "watertight" or SBS or polyurethane waterproof coating or EPDM coil, it will not work. I am not afraid of water being caught in the middle, but I am afraid that water will have a bad influence on their bonding parts, so that the waterproof layer will leak at the overlapping parts.

reference data

Baidu knows. Baidu [reference time 20 17- 12-22]