How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manfuactured and modular homes
What's causing those holes in the fascia?
Tuesday, October 2, 2018
The carpenter bee (xylocopa) bores into wood each spring to create a brooding nest, creating a perfectly round hole about about 5/8” in diameter. While some carpenter bees select the underside of tree branches to nest, others bore into the exterior wood of houses. In the photo above you can see both the bore holes and areas where their elongated galleries just behind the surface of the wood have also become exposed as the thin surface wood has rotted away over time. Although we typically see carpenter bee holes in fascias and soffits, because they seem to prefer a higher location, occasionally they damage siding and the underside of wood railings.
Carpenter bees are often confused with bumblebees, since they are similar in their coloration and large size. But they have a shiny abdomen, whereas the bumblebee abdomen is covered with dense hair.
If you have carpenter bee damage in the exterior wood of your home, there’s both good and bad news: the tunnels they burrow are shallow and rarely cause structural damage, but they return to the same location each Spring to build a new nest. You can fill their holes and paint over them, but they will simply bore a new hole nearby the following year.
Carpenter bee damage is not reported in a Florida WDO (Wood Destroying Organism) inspection for homebuyers, because—unlike termites and wood destroying fungi—they do not eat the wood, but simply bore into it for their nest.
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To learn more about TERMITES, WOOD ROT AND OTHER PESTS see these blog posts:
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