Definition
Fumigation is a pest control method where a gas fumigant is introduced throughout an entire structure or enclosed space so it penetrates everywhere pests could be hiding, including deep inside wood framing and wall cavities that no spray, dust, or bait could ever reach. Unlike a targeted treatment aimed at a specific room or void, fumigation treats the whole structure at once, which is why it's typically reserved for severe or widespread infestations rather than routine pest issues.
The most common reason a homeowner encounters fumigation is a drywood termite infestation that has spread throughout the structure. Because drywood termites can live deep inside solid wood members throughout a house, rather than in one accessible nest, localized treatment often can't reach every colony. Fumigation is also occasionally used for severe, widespread bed bug infestations when other methods haven't resolved the problem.
- A wood-destroying organism inspection reveals drywood termite damage and activity spread across multiple areas of the roofline and framing, not confined to one accessible spot
- The structure must be fully vacated by people, pets, and plants, and food and medications sealed or removed, for the duration of the treatment
- After the gas exposure period, the structure is aerated and tested to confirm it's safe before anyone re-enters
Because fumigation involves regulated gases and strict safety protocols, it's performed only by specially licensed applicators, and it's generally recommended as a last-resort option once a pest control professional has confirmed that spot treatment won't solve the infestation.