What should always be recommended when drywoods are found leading to inaccessible areas?

Fumigating the area is the most effective recommendation when drywood termites are found in inaccessible areas. This method ensures that not only the visible colonies but also those hidden deep within the infested structure are thoroughly addressed. Fumigation utilizes gas that penetrates all areas, including those that are hard to reach, allowing for the elimination of termites in their nesting sites.

Other alternatives, such as leaving the termites alone or treating only the visible areas, do not adequately address the risk of infestations spreading or the potential for structural damage to the building over time. Sealing the area without treatment may prevent access but fails to eradicate the active infestation, leading to continued damage and potential reinfestation. Thus, fumigation stands out as the most comprehensive solution for controlling drywood termites in hard-to-reach locations.