The most obvious warning sign is the indication of movement, which can result in serious structural problems. Take note of the plaster and concrete surfaces for cracks as well as the ground surrounding the property. The hillsides in the Cincinnati area are subject to movement. If breaks in the ground are noticed and you are unsure of the cause, have it checked because it may save your structure from severe damage. Buildings with flat roofs have particular problems.
Most people are aware of heavy snow loads on roofs.
At least once a year, we hear about a roof collapse in the nation due to snow load. But the spring can be equally treacherous for flat roofs. Often the roof drains are clogged by debris which restricts the flow of rainwater. During the heavy spring rains, the backup of water on these roofs becomes excessive. The load on the roof is more than it is designed to withstand, and structural collapse may occur.