Water leaks potential can cause a lot of damage and expense if not picked up on straight away. Typical water leaks can be found in the bathroom usually as a result of a water proofing problem associated with the shower base. Also cracked roof tiles or poorly fitted flashings can let water enter into your roof space.
In the photo below you can see a typical stain and sagging of the plasterboard ceiling that indicates a water leak. In this instance this was located below the upstairs shower. Obviously there is a problem with the water proof membrane in the shower.
Perth Property Inspections can provide you with Professional Advice in relation to water leaks and any other questions you might have in relation to pre-purchase property inspections.