Re-entry After Fumigation
Learn what happens after treatment, from aeration and clearance testing to approval for re-entry.
First Class
Fumigation Guide
Explore each step of the process to learn what to do, what to expect, and how to prepare for a safe and successful fumigation.
The Fumigation Process
Preparing for Fumigation
What to Expect
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Re-entry After Fumigation
Safety & Product Information
How Re-entry Works After Fumigation
After the treatment period is complete, the structure enters the aeration phase. Doors, windows, and other openings are used as required to allow the fumigant to dissipate, and ventilation may be used to help move fresh air through the structure. During this time, the property remains restricted and occupants must stay out until the fumigation company completes the required clearance procedures.
The amount of time needed for aeration can vary based on the structure, treatment conditions, and the fumigant used. An estimated completion time should not be treated as permission to return. Re-entry depends on the structure completing the required aeration and clearance process.
Before the property can be released for occupancy, the fumigation professional must test the air inside the structure using an approved clearance device. For residential sulfuryl fluoride fumigation, EPA requires the fumigant concentration to be confirmed at 1 part per million or less in the breathing zones of each room before the structure is considered cleared for re-entry.
If the measured concentration remains above the clearance level, additional aeration and testing are required. Warning signs and access restrictions remain in place until the structure has met the applicable clearance requirements.
Once the required testing has been completed and the property has been officially cleared, you will be notified that re-entry is permitted. Only then should occupants return to the structure. Do not rely on tarp removal, activity at the property, or a previously estimated completion time as an indication that it is safe to go inside.
After clearance, customers can return to normal occupancy unless their pest control provider has given them additional project-specific instructions. If you have questions about timing or whether the property has been released, contact your pest control provider before returning.
RE-ENTRY AFTER FUMIGATION
What to Expect Before You Return
Re-entry happens only after the required aeration and clearance procedures are complete. Before returning, wait for official confirmation that the property has been released for occupancy and follow any additional instructions provided for your project.
Clearance Testing
Before the property can be released for re-entry, the fumigation professional must complete the required clearance testing. Air inside the structure is measured to confirm that fumigant levels have dropped to the permitted re-entry level.
Official Notification
Do not return based on an estimated completion time or because the tarps have been removed. Wait until you receive confirmation that the required clearance procedures are complete and the property has been released for re-entry.
Returning to the Property
Once official clearance has been given, occupants may return to the property. Follow any project-specific instructions provided by your pest control provider and make sure everyone in the household knows the property has been cleared before entering.
What You May Notice
After re-entry, the property may show minor signs that fumigation work has taken place, such as areas that were opened or accessed during preparation and aeration. Review the property when you return and contact your pest control provider if you have questions or concerns.
Questions After Re-entry
If you are unsure about anything after returning home, including project-specific instructions or conditions at the property, contact your pest control provider. They can address questions related to your particular fumigation and any follow-up recommendations.
Important to Know
Do not return to the property until you have received official confirmation that it has been cleared for re-entry. Tarp removal or an estimated completion time does not mean the structure has been released for occupancy.
Before You Return
Even when the property looks ready from the outside, re-entry is not permitted until the required clearance process is complete. Wait for official confirmation before heading back, and keep any project-specific instructions from your pest control provider available when you return.