Termites in Attic Framing — Treatment Options for Attic Infestations

Drywood termites thrive in attic framing for several reasons: wood is often older and untreated, the attic environment is warm and protected, and swarmers enter through ridge vents, soffit vents, and any small gap in the roofline.

Signs of attic termite activity: frass accumulation on attic floor insulation, kickout holes in rafters and collar ties, hollow-sounding framing members, and visible galleries when damaged wood is examined.

Treatment options for attic infestations depend on the extent of activity. Localized infestation in one or two members: orange oil injection or spot treatment ($500–$1,500). Widespread infestation across multiple attic framing members: tent fumigation ($1,500–$4,000) or heat treatment ($1,200–$3,000) — both achieve whole-structure coverage.

Heat treatment is particularly effective for attic infestations because attics heat up rapidly and the treatment can be completed in one day with same-day return. Fumigation provides 100% whole-structure coverage including areas heat treatment may not fully reach in very large attics.