If you see a few live termites immediately after your home has been fumigated, don't be alarmed. Sometimes it can take three to five days for all of the termites to die. Rest assured whole-structure fumigation with Vikane gas fumigant will eliminate all of the drywood termites in the home.lso, most buyers expect the home that they are purchasing is going to be treated. Whole-structure fumigation with Vikane gas fumigant meets all state and lender requirements for real estate transactions.