Abstract: An insecticide dispensing apparatus for delivering insecticide from an outside source to a building having a foundation and a roof space thereunder. The apparatus includes an access unit having an inlet port external to the building, an upper pipeline arrangement having at least one outlet is located in the roof space and extends to the access unit. A lower pipeline arrangement including at least one outlet is located under the foundation. This lower pipeline arrangement also extends to the access unit whereby insecticide is effectively distributed with respect to the building.