Do I need to vacate my home before an exterminator can spray for insects? Yes 25% In some cases 75% Get Free Quotes Today! Question: Do I need to vacate my home before an exterminator can spray for insects? Top Answer (75% of 8 votes): In some cases. Answer: Yes Explanation: Must leave for 4 hrs. Patrick's Pest Control Answer: In some cases Explanation: It all depends on the extent of application and the product used. Fall Guys LLC Get Free Quotes Today! Find Local Pros Free Pest Control - Bugs and Insects Cost Estimates Related Questions Will cold weather kill cockroaches?Top answer: Never Can I use my furnace to kill bed bugs?Top answer: Never Do I need to throw away my mattress if bed bugs are found on or around it?Top answer: In some cases Would you recommend the use of a bed bug detection dog?Top answer: Yes Are bed bug detection dogs a good alternative to traditional pest detection?Top answer: In most cases