Folks,Never a very happy discovery but pretty common. There are 2 or 3 different very small beetles called 'powder post beetles'. The holes are where the mature adult leaves the wood, so by time you see that the critter has laid its eggs and gone. You can take a pick or awl and drive into wood beams; if there is really bad (dangerous) damage the thing will sometimes go right thru a 6" beam....hopefully not that far gone. Usually they have to work for a long time to do much structural damage, hopefully you 'caught' them in time.
I discovered upon the hood of my Cub Cadet some fine sawdust in teensy little piles. It did not take me long to discover that many of the beams in my small barn, including the one over the Cub Cadet, were riddled with teensy holes. Are these from powder post beetles?
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