In what type of structures is the old house borer typically found?

The old house borer is primarily associated with buildings that have a certain age and has a preference for older wood that has been subjected to appropriate conditions, such as moisture. These boring insects typically attack seasoned wood, particularly in structures that are older than 50 years.

While it is true that different wood-boring insects can infest wood of various ages, the old house borer specifically prefers wood that has been part of a structure for a longer period, ideally contributing to its lifecycle and environmental needs. Newer structures, especially those less than 10 years old, are less likely to host a significant population of the old house borer because the wood is generally in better condition and not as vulnerable to attack.

The other options, such as unfinished basements or heavy timber frames, do not pertain directly to the specific identification and common habitat of the old house borer, further supporting the understanding that this pest is primarily found in older buildings where its preferred wood species are present.