Start by getting your pest company's written prep instructions and following them, because the product, the label, and the treatment method decide what you need to do. In general, prepare by giving the technician access to where roaches hide, putting away food and dishes, dealing with pets and fish tanks, cleaning up grease and crumbs, and fixing leaks. Do not spray, fog, or dust the area yourself beforehand. UF/IFAS warns that using a repellent product where bait may be applied will render the bait ineffective because the treatment contaminates the bait, and the UC Statewide IPM Program describes sprays and foggers as products that may repel and disperse cockroaches instead of killing them. How long you stay out is set by the product label or your technician, not by a universal rule.
The earlier version of this guide said to plan on being away for "2-4 hours" after every treatment and suggested 24 to 72 hours for "fumigation." Neither number applies across the board. Many roach treatments use gel bait and crack-and-crevice applications rather than room-filling sprays, and whole-structure fumigation is a different, specialized service. The older article also recommended bay leaves, cucumbers, coffee grounds, and a homemade boric acid and sugar mix. We could not find extension-level support for those, so they are gone.
Start With The Company's Instructions
Ask the company for its prep sheet when you book. Requirements differ, and the technician needs different things depending on whether they plan to bait, dust, or spray. To see what a typical sheet asks for, one large pest company's cockroach treatment preparation page asks customers to clean the kitchen and bathrooms, empty cabinets, drawers, and under-sink areas, take out garbage and recycling, and relocate pets. That is one company's list, not a standard, so follow yours.
Prepare In This Order
- Do not treat the problem yourself first. Skip bug bombs, cans of spray, and repellent home remedies before the visit. EPA's advice is to use fogging devices only when absolutely necessary, and Penn State Extension says of sprays and foggers that you cannot control where the chemicals go and the risk of exposure is high. If you have already used a product, tell the technician what it was and where you used it.
- Leave sticky monitors in place and note what you have seen. UC IPM recommends sticky traps at junctions of floors and walls to show where the roaches are. Tell the technician where you see roaches, at what time of day, and how big they are.
- Clear access to hiding places. Empty the cabinets, drawers, and space under the kitchen and bathroom sinks, and pull out anything stored against walls where the technician will need to work. Ask whether to leave the emptied drawers in place, and do not stack boxes against the areas you want treated.
- Put food away. Store food in sealed plastic or glass containers, as EPA recommends. Per NPIC's guidance on minimizing exposure, remove or cover food, dishes, pet bowls, toys, and bedding in the areas to be treated, and ask whether to turn off central heating or air conditioning during application.
- Clean up what roaches eat. UC IPM says even tiny crumbs in cracks attract cockroaches and recommends sealed food containers, tight-fitting trash lids, and vacuuming cracks with a HEPA-filtered vacuum to avoid stirring up allergens. Clean grease from stoves and cabinets, take out the trash, and rinse recycling. This matters because bait has to compete with other food. Our guide on what attracts roaches shows where to look.
- Fix water problems. UC IPM recommends eliminating plumbing leaks and other moisture sources. Repair drips, dry the sink area, and tell the technician about any leaks you cannot fix yourself.
- Reduce clutter. Boxes, paper bags, and piles give roaches places to hide that a technician cannot inspect. Bag or bin what you keep instead of leaving loose stacks, and ask the company where to stage items so you do not move roaches from one room to another.
- Plan for pets and fish. NPIC advises removing pets from the area, along with pet toys, bones, bowls, and bedding, and covering fish tanks so liquid and vapors do not get in. Its fogger guidance adds turning off tank pumps. Keep pets away until the product is completely dry and the area well ventilated, or longer if the label says so.
- Tell the company who lives in the home. Mention infants, pregnancy, asthma, and anyone who is immunocompromised, and ask for the lowest-exposure approach that will still work. EPA advises asking a pest control operator to use baits and crack treatments when possible.
What To Ask Before You Hire
Hiring a pest control company is a decision with consequences for your family, not a formality. The University of Minnesota Extension suggests verifying a current applicator license for the right category, confirming insurance, asking whether they use integrated pest management, and asking whether they guarantee their work. Useful questions include:
- Which products will you use, and what are their EPA registration numbers?
- Will you use gel bait and crack-and-crevice treatment, or spray the whole room?
- Do we need to leave, and for how long?
- How many follow-up visits are included, and what do you want me to do between visits?
- What should I not clean?
The same source says that after the service the company should give you a statement listing its name, contact information, date of service, the product used with its EPA registration number, and precautionary information. Our guide on what a roach exterminator costs explains the typical pricing structure so you can compare quotes.
Staying Out, Re-Entry, And Fumigation
There is no single re-entry time. The label of the product being applied governs, and NPIC's general rule is to keep children and pets out until the product has dried and the area is ventilated. The company sheet above asks customers to stay out for 2 to 4 hours once treatment access is given, which is one company's policy, not a legal standard. If your technician is using only gel bait in cracks, ask whether you need to leave at all.
Whole-structure fumigation is a different situation. NPIC's sulfuryl fluoride fact sheet says that product may be purchased and used only by certified applicators and that EPA requires the gas level to be measured and very low, under 1 ppm on labels, before occupants return. That means re-entry depends on a clearance measurement, not a fixed 24 to 72 hours. The fumigation company will give you a separate prep list.
What Not To Do
- Do not use bug bombs before or after the visit. EPA notes their propellants are typically flammable, and CDC's review of fogger-related illness found 3,222 cases in 10 states from 2007 to 2015, with failure to vacate and early re-entry as leading causes. Foggers also do not solve the problem, as our guide on how many roach foggers you need explains.
- Do not put out home remedies that repel roaches. If a product repels roaches, it can also keep them away from the bait your technician places.
- Do not scrub treated cracks and baseboards afterward. Wash the surfaces people and food touch, but ask before wiping treated edges. Our guide on cleaning after a roach treatment goes through what to wash and what to leave.
- Do not use boric acid powder or other dusts casually. NPIC's boric acid fact sheet notes that people exposed to airborne borax particles reported a dry mouth, nose, and throat, that borax is corrosive to the eye, that children may put their hands in their mouths, and that pets that eat it can show poisoning symptoms within 2 hours. Tell the technician if you have put any powder down.
After The Treatment
Expect a gradual decline. UC IPM says an effective bait program does not give immediate results and may take 7 days or longer. The company sheet mentioned above says activity can rise temporarily in the first 7 to 10 days as materials take effect, which is common for bait programs but is one company's observation, so ask your own technician what to expect. Keep the monitors, do not disturb bait stations, and write down what you see. Our guides on what to expect after a roach treatment and how to tell if roach bait is working give a fuller timeline.
Penn State Extension advises that if baits have not eliminated an infestation within 30 days, they should be replaced with a different brand, and that persistent trap catches after consistent treatment call for a certified professional. If you still see roaches at that point, call the company back rather than adding your own products.
Frequently Asked Questions
Do I have to leave my home during roach treatment?
It depends on the product and the label. Ask the company before the visit. Keep people and pets out of treated areas until the product is dry and the area is ventilated, and follow any longer time on the label.
Should I clean before the exterminator arrives?
Yes, but clean to remove food, grease, and clutter, not to erase where roaches live. Do not use repellent sprays, and leave sticky monitors and any bait already placed by a professional alone.
Do I need to empty every cabinet?
Follow your company's prep sheet. Typically that means kitchen and bathroom cabinets, drawers, and under-sink areas, because those are places roaches shelter and where treatment is applied.
What about my aquarium or pet birds?
NPIC advises covering fish tanks so liquid and vapors do not enter and turning off tank pumps if a fogger is used. Tell the company about tanks, birds, and reptiles before they begin, and follow the product label.
Can I use natural remedies before the visit?
We would not. The sources reviewed for this guide do not support bay leaves, cucumbers, or coffee grounds for controlling roaches, and any repellent can work against the bait a professional uses.
Sources
- UF/IFAS: Assessment-Based Pest Management of German Cockroaches — monitoring, and repellent products ruining bait.
- UC Statewide IPM Program: Cockroaches Management Guidelines — sanitation, monitoring, HEPA vacuuming, foggers and repellency, and bait timing.
- Penn State Extension: Got Roaches? Eliminate Roaches with IPM — sprays and foggers, the 30-day bait rule, and when to hire a certified applicator.
- EPA: Do's and Don'ts of Pest Control — sealed food storage, baits first, fogging only when necessary, and asking for baits and crack treatments.
- NPIC: Minimizing Exposure around Pesticides, Pesticide Use Around Pets, and Boric Acid General Fact Sheet — food, pet, fish tank, and boric acid precautions.
- NPIC: Sulfuryl Fluoride Technical Fact Sheet — restricted use and clearance before re-entry.
- University of Minnesota Extension: Hiring a pest control professional — licensing, insurance, IPM, guarantees, and post-service statement.
- CDC MMWR: Acute Illnesses and Injuries Related to Total Release Foggers, 2007–2015 — case counts and leading causes.
- American Pest: Preparation for Cockroach Treatment — one company's prep checklist, re-entry policy, and post-treatment expectations.
