Although the law doesn't require it, building inspection should always be done by an accredited third-party company. Doing regular building condition checks and maintenance is something that the property owner should always do anyway. However, there are instances where fire or building collapse occurs. Particularly public buildings that are heavily occupied by multiple people, even though their structural integrity has not yet been compromised. These instances can lead to massive damages, especially in public institutions such as schools and government buildings. This can lead to the public suffering because they cannot access their school or workplace until everything is cleared. For those affected, they have one option: to file a lawsuit against responsible parties. Building inspection control can only be effective if the responsible government agency conducts its own investigation and inspects the premises. After this is complete, the inspector will use other equipment to check for serious damages such as burning or electrical surges. An infrared camera can be used to take photographs and video of each site and assess its condition. If he finds moisture problems in the walls, roofs, insulation or walls, he will take pictures and video footage to document the problem areas and recommend solutions. Meanwhile, excess-large buildings may require extensive repairs which the management will need to pay for. Flood is another possible outcome. Even if a building is dry underneath, water can still cause water damage to its top floors if it leaks through the roof. Extra-large buildings can also be affected by water damage. If the water level rises too high, the foundation will collapse. Floods can cause structural damage to buildings and affect residents. Building inspection is essential for property owners and occupants to ensure safe living conditions. A major portion of a building's cost (after all, it's the building that pays for it) is the roof. Leakage in the roof can affect the rest the building. An inspection might include checking the chimney and vents for leaks. There are many types and styles of roofing that homeowners need to be aware of. Rubber roofs, for instance, are less durable than clay tiles or slate tiles. The roof system inspection report must contain details about the material used. To avoid costly repairs, it is important to determine the roofing material as soon as possible. Extra-large buildings should have their roofs repaired as soon as possible. The inspector should inspect the foundation and doors, windows, and walls to find cracks and other damage. All these areas of a building must be inspected before issuing a Building Inspection Control Certificate to ensure that everything is in good repair. If the owner is certain that the building has passed all inspections it cannot be used for other purposes. The inspection certificate gives assurance to the owners that the building maintenance was done in accordance with all regulations. It also indicates that safety standards are being observed. This document is not sufficient. A building must always be inspected at least twice annually, and even more often if there are serious concerns about the safety of its occupants. All property owners are responsible for ensuring that their living standards and buildings are in good condition. All defects in the building must be noted and brought to the notice of the property owners or their agent. This can only be done by a Building Inspection. It must be completed within two month of the completion. Any changes that have occurred after the last inspection must also been brought to the attention of the owners. All defects in the building must have been corrected before the warranty period ends, which is usually six month.