What term is used for a claim that results in additional time necessary to complete work due to unforeseen circumstances?

The term that refers to a claim for additional time needed to complete work due to unforeseen circumstances is known as "Constructive Acceleration." This concept arises when a contractor is delayed by certain factors that were not anticipated at the start of a project, such as unanticipated weather conditions or site conditions that differ from those outlined in the contract.

In the context of construction projects, constructive acceleration occurs when a contractor is forced to expedite the project timeline after experiencing delays, typically for reasons outside of their control. This can lead to claims for additional costs and time extensions. It is essential for contractors to document the causes and impacts of delays accurately to substantiate their claims for constructive acceleration.

The other terms have distinct meanings in construction and contracting. A teaming agreement is a partnership arrangement typically established before bidding on a project. Differing site conditions refer specifically to physical conditions on-site that differ from what was expected during project planning. Indemnification relates to compensating for harm or loss and does not specifically address the concept of project timing or unforeseen delays.