Definition
Fine, sawdust-like debris left behind by wood-boring insects such as carpenter ants or wood-destroying beetles, often found near an active nest.
In Plain English
The sawdust that isn't from a home project
Frass looks like fine sawdust or wood shavings and accumulates near where a wood-nesting insect is active — often pushed out of small exit holes as the insect excavates. Finding it near trim, sills, or framing (without a clear source like a DIY project) is a signal worth investigating.
Why It Matters
Why frass is a signal worth acting on
Frass usually means active excavation is happening nearby, not old damage from the past. It's one of the more reliable visible signs of a carpenter ant or wood-boring insect problem in progress.
Where We Work
Every corner of the 757
If you're in Hampton Roads, we can be at your front door this week.
NorfolkVirginia BeachChesapeakeNewport NewsHamptonPortsmouthSuffolkWilliamsburg