The benefits of fumigating a house include the ability to eliminate pests that are deeply embedded in structures, such as termites, bed bugs, and wood-boring insects. Fumigation ensures comprehensive coverage as the gas penetrates walls, floors, and crevices, reaching pests in inaccessible areas. It provides a fast and effective solution for severe infestations, reducing the risk of long-term damage to property and preventing health hazards associated with pests.