Yes, it is possible for a foundation to experience both settlement and heaving at the same time. While these are often viewed as independent issues, they can occur together on a single structure, creating complex structural challenges.

According to the provided content, this co-occurrence typically arises from the following factors:

• Soil Heterogeneity: Different soil conditions may exist beneath different parts of the same foundation. For example, one side of a house may sit on expansive clay (causing heave), while another side sits on improperly compacted fill material (causing settlement).
• Moisture Distribution: Uneven moisture levels can trigger upward movement in one zone while other areas remain stable or sink.
• Structural Torsion: When one section of a foundation moves upward while an adjacent section moves downward, it can result in severe diagonal cracking, the racking of doors and windows, and structural twisting.

Because repair strategies for settlement (such as steel piers) differ fundamentally from those for heaving (such as moisture control and drainage), professional diagnosis is essential. Treating only one of these simultaneous conditions may inadvertently worsen the other. Experts recommend consulting a licensed structural engineer to evaluate these combined movement patterns and design a tailored repair plan.