Structural Termite Damage Found — Treatment and Repair Options

Structural termite damage is most commonly found in: sill plates (the wood member at the base of walls, sitting on the foundation), floor joists (horizontal framing members supporting floors, often attacked from below), rafters and ridge boards (in attics with drywood infestation), and posts and beams (load-bearing vertical members).

Finding structural damage doesn't mean the structure is immediately unsafe in most cases — but it does require assessment and repair. Our inspection includes a structural damage assessment identifying which members have lost significant cross-section and which are cosmetically damaged only.

Treatment must be completed before repair. Repairing around active infestation creates conditions for continued damage to the new material. After full treatment clearance, repair work can begin immediately.

Repair methods for structural damage: sistering (attaching a new member alongside the damaged one — most common for floor joists and rafters), replacement (removing and replacing the damaged member — required for severely compromised sill plates or posts), and structural epoxy (effective for smaller areas of damage in accessible locations).

Repair costs vary widely: cosmetic repairs (fascia, trim) $200–$800, sill plate repair $500–$2,500, floor joist sistering $800–$3,000, full structural beam replacement $1,500–$8,000+. Our written repair estimate is itemized and includes photographs.