Now is popular that people has their residence renovated. It mostly carried out immediately after property owner has obtained approval from relevant approval agency. Commonly we will not know when house defect will be occurred. Most of the defects will take place soon after particular period of time. But it may perhaps have sign of quick impact. Project Management shown mainly due to very poor qualities of workman ship, poor material used, creating structure is under developed and ground situation. There are a quantity of possibilities of house defects will occur. It will depend on case by case basis.

One of the popular defects that are the cracks line will be appeared along the joint in between new building and current creating. If the building foundation is pile foundation then the effect of cracks will be additional considerable. It is because most of the extension operates that carried out by renovation contractor is employing pad foundation. If existing creating is pile foundation and new extended constructing is pad foundation then there will be important of differential ground settlement. This differential settlement will make cracks occurred.

It is occurred mainly because a lot of people today who want to renovate property will appear for creating contractor, but they have forgotten that they need to appear for engineer 1st before engage a creating contractor. Un-reliable contractor will not help house’s owner to engage a structural engineer, contractor will build the residence based on his owner expertise. In addition he only knowledge on builder performs, he does not has expertise on ground investigation, theory of structure and design of structure. As a result, the finish item will result in the cracks line come about as mention above.