As per visiting the site, we found that the contractor repaired 4 units of artificial stone in bay 2 No:(S8F-007, S7-009, S6-007, S6B-003) because the contractor used grinder machine to adjust the edges of units mentioned above which led to the appearance of defects in these units, Although there are no approved materials for repair the artificial stone units or approved method. Therefore, these units is considered rejected and the contractor has to change it by another similar units without defects.