old house borer picture oldhouse borers 

Old House Borer Damage

This is a picture of old house borer damage. This 2 x 6 was in an attic and discovered by the homeowner 4 years after the home was built. Upon further inspection, it was determined they had live borers. Holes like these were found in different sections of the basement. Since the basement was unfinished, Boracare was used to treat all exposed wood. Although the activity was only discovered in the studs which were installed for the homeowner in case they decided to finish the basement, all the floor joists, subflooring and sill plate were treated. Within two months all the activity ceased. Old house borers vary in size. Expect holes to be 1/4" to 1/2" in diameter. Although they may be close together, it is not unusual to find them far apart. Holes which appear sealed may have larva or pupae.

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