The water seepage has always been the most panic issue for owners and tenants. The chemical injection has been suggested if the repairing area is limited and no waterproofing membrane can be applied from an exterior wall or above the flooring. After the first chemical injection which the water seepage can happen to other weaken points. Close-up monitoring is necessary for a second or third time. The clients should consider a one-stop solution from inspection to rectification to solve the water seepage issue.