The old-house borer primarily infests which part of a structure?

The old-house borer is specifically known for infesting wood that has been structurally compromised or aged, often found in older homes. The primary area of concern for these pests is typically the structural wood elements of a building, such as framing, beams, and joists, which are often found in basements. Basements provide an environment that may include dampness, a food source of decaying wood, and shelter from light, making them an ideal habitat for old-house borers to thrive.

While other areas like attics and cabinets can also be at risk depending on the conditions, the characteristics of basements—especially in older homes—make them the predominant area for these pests. This focus on structural integrity and specific environmental factors reinforces why basements are emphasized when discussing the infestation patterns of old-house borers.