White styrafoam powder residue falling from my wood ceiling. (2x6 yellow pine with 12 inches of styrafoam.above)

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White styrafoam powder residue falling from my wood ceiling. (2x6 yellow pine with 12 inches of styrafoam.above)

Syrafoam like dust coming out of the grooves in the tougue and groove 2x6 ceiling boards at the edges of the beams.
Beams are 5 foot apart, dust is falling only on the sides of the beams all on the same 2 x 6 board. Four double spots 5 feet apart.
i.e. four spots per beam - above and below the 2x6 on each side of each beam.
Located in East Tennessee. All materials were installed in summer of 2008.

Status: Open May 17, 2017 - 05:26 AM

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RonDawson

May 17, 2017 - 09:46 AM

Sounds like carpenter ants or acrobat ants. If it looks like styrofoam it probably is. Acrobat ants love to tunnel through styrofoam. If it looks like wood shavings and the shavings are very coarse, then it could be carpenter ants. We get this report on a regular basis and it's usually acrobat ants. They look like carpenter ants but are smaller. Termidor foam injected into the areas where they are nesting or colonizing will kill them.
If you have pictures or samples of the "frass" that could help.

Ron

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