In what situation would a termite inspector need to recommend fumigation?

A termite inspector would recommend fumigation specifically in cases of widespread damage from drywood termites because this method is highly effective in treating extensive infestations that cannot be adequately addressed by localized treatments. Drywood termites establish nests within the wood and can cause significant structural damage over time. When their presence is confirmed throughout a large area of a structure, fumigation is often necessary to ensure that all colonies are effectively eradicated, including those that may not be immediately visible.

Localized treatments might work for minor infestations, but they often fall short when the infestation is widespread, as some colonies could remain untreated and continue to reproduce. Fumigation, which involves sealing the structure and filling it with pesticide gas, penetrates wood and reaches the hidden colonies, ensuring thorough eradication. Thus, in scenarios where there's extensive damage and threat posed by drywood termites, fumigation is the best course of action to protect the integrity of the building.