The porch is about 20 years old and the inside is done with individual boards, each one butted up against the other. Something is eating on a couple of the boards, but from the backside. I only see sawdust- never see worms or bugs. Have checked at night, too. This started only about 3 weeks ago and seems to be progressing fairly quickly. We had our pest company out but they examined the boards and checked beneath the porch and said they don't know what it is but it is not termites. What would suddenly begin eating the backside of the boards? If we have to we will have to remove a corner board and pry away the boards. We really hate to do it but we don't want the porch eaten up after all these years. These particular boards surround a chimney - I don't quite remember how the chimney was covered.
I hope someone can suggest a solution other than removing the boards.
Thanks.