A used bought house that was once occupied by a non-muslim that is suspected to be in contact with the two types of najis will be thoroughly sertu. The process includes sertu of all the rooms including the kitchen. Any physical najis have to be cleaned prior to the sertu process. The process can be done before or after renovation.
The process of sertu is to clean(wash) the affected area of parts with seven times where one wash using mutlak water mixed with clay and six washes with mutlak water.
Sertu service provides a peace of mind for Muslim consumers.