Final answer:
Without specific information from a contract or warranty, it's not possible to determine the duration for which a builder will patch voids caused by foundation cracks. Durations can vary and should be looked up in relevant documentation.
Step-by-step explanation:
The question asked does not contain enough information to provide a definitive duration for which a builder will patch the voids in walls caused by cracks in the foundation. Typically, the duration of such repairs would be specified in a contract or warranty provided by the builder. Generally, foundation repairs and their associated fixes, such as patching voids in walls due to cracks, might be covered for varying periods ranging from a few years to lifetime warranties, depending on the extent of the repairs and the policies of the construction company.
It's important to consult the specific contract or warranty documentation related to the construction project in question to determine the exact duration of coverage for such repairs. The builder will patch the voids in walls caused by any cracks in the foundation that exceed 1/8 inch in width or vertical displacement for a specified period of time until repairs are completed.