What Happens During a Bi-Monthly Pest Control Treatment, Step by Step

Pest control can, at times, look simple and straight forward – like we’re walking around your house with a sprayer and leaving. But the process is actually much more multi-layered than that. Everything is specific and deliberate, built around your property and the process required to make sure that your home is protected from all types of common household pests.

While the actual step by step process is often seasonal and can vary between homes, most of the time, you can expect that your pest control treatment will follow the following process.

The Pre-Step – Asking You

Before we even start on your property, we’ll knock on the door, check to see if you’re home, and if you have any areas of concern. Since we haven’t yet set foot into your property, we’ll ask you if you have seen any pests that might be causing you issues. If you have, we’ll change all the following steps based on what you’re noticing. If not, and everything is functioning properly, we’ll move forward with our standard approach.

Inspection and Web Removal

The first step of the process is actually two steps combined into one. We have to inspect the property before we can provide any treatment to see if there are any areas of concern that need to be addressed with a special formula.

For efficiency, we will often combine this with web removal. We’ll walk around your property looking for problems all while taking care of any spider webs (and, in some cases, wasp nests) that have started to form around your property. Knocking those down provides us with an opportunity to look around before we’ve applied any treatment.

Exterior Perimeter Treatment

That inspection, should it find anything, determines everything that follows. If we don’t find any specific areas of concern, we start the process for seasonal pests. If we do, we do a deeper inspection and then coordinate the approach with you. For example, if we see evidence of rodents, we’ll talk to you about accessing the area of concern and discuss the next approach.

Assuming no noticeable changes from our last visit, we start setting up the perimeter. While pest control looks like a basic spray, within the spray is a formula designed for seasonal pests and, on occasion, adjusted for any problems on the property. If you have too many spiders, for example, we have adjustments we can make to help increase the concentration of pesticide that affects spiders.

These sprays are all different, but have many things in common. First, at ExtermPRO, they are always human or pet safe. Most are derived from plants, and when they’re dry, they are not considered harmful to animals. They are also long lasting, sitting invisibly on the surface for months. When any pest walks over it, small particles bind to the insect and get absorbed, disrupting the nervous system.

Interestingly – and it’s something we’ll discuss more of in a moment – the pesticides do not work right away by design. They are purposefully slow acting. So the pests can walk over it like nothing is wrong. However, over time, their nervous system will get disrupted and they will eventually die off.

All of this takes place at the exterior of the property. Even though these chemicals are safe, it is helpful to have them on the outside of a property so they can eliminate any pests that are even attempting to get inside, not just those that have already entered, while also keeping it away from humans (as a precaution). A typical perimeter treatment covers several specific areas:

• Foundation Band — A band of treatment applied along the base of the foundation, typically extending a foot or so up the wall and out from the structure, creating a barrier pests cross on their way toward the home.
• Door and Window Frames — Common gaps around frames get direct treatment, since these are frequent entry points.
• Eaves and Rooflines — Treatment along the eaves and soffit targets wasps, spiders, and other pests that approach from above rather than at ground level.
• Weep Holes and Utility Penetrations — The small gaps where pipes, wires, and vents pass through exterior walls get specific attention, since they’re easy entry points that are also easy to overlook.

This exterior-first approach also limits how much product ends up inside a home, which matters for families with young children, pets, or anyone sensitive to chemical exposure.

The Area Right Around the House

Technicians pay particular attention to the space immediately next to the structure, sometimes called the area inside the drip line: the ground right against the foundation, the vertical wall surface, and the underside of any roof or porch overhang covering that space. This zone gets missed when a technician only sprays a generic band around the house without accounting for these three separate surfaces, which is part of why the quality of a perimeter treatment can vary so much between providers.

Interior Treatment, When It’s Needed

Interior treatment is more targeted than exterior work, and it doesn’t happen the same way on every visit. If and when we do an interior treatment, we target places like baseboards, cracks and crevices, and specific problem areas get treated based on what the inspection found, using methods suited to the specific pest. For example, we may place gel baits in kitchens and bathrooms for roaches, apply dust inside wall voids, or spot treat in a specific room where activity has been reported.

Interior treatment requires more preparation than exterior work, moving items away from walls, covering food, sometimes clearing a room temporarily, which is part of why a strong exterior perimeter does most of the preventive work while interior treatment stays reserved for addressing something specific.

Pests – thankfully, for us humans – have specific ways to travel, where they’ll run across walls and corners where they’ll feel safest. By applying an interior treatment to these areas, we’re able to effectively eliminate most pests inside of the home.

Rodents and Other Wildlife

All of this is designed to prevent and eliminate all different types of pests. Most of the time, this is enough. The exception is wildlife.

Rodent control doesn’t rely on spray treatment the way insect control does. But it’s also not necessary for all homes. When rats are suspected, or there is a high risk (such as for older homes), technicians place snap traps or bait stations along walls, in attics, and near entry points identified by droppings, gnaw marks, or grease trails, relying on trapping and exclusion, sealing up entry points, rather than chemical application.

What You Might See in the Days After Treatment

Most exterior treatments work over time rather than on contact, using a residual product that keeps working for weeks after application. Pests that come into contact with it can take time to die, sometimes appearing more active or visible in the days right after a visit before that happens.

This is partially intentional. While it does mean that you can see live pests on your property on occasion, it also means that pests that travel back to nests or in areas with other pests may carry some of these particles on them. This allows it to eliminate other pests as well.

However, it can also mean that in the days after treatment, you may actually see some pests. Those that have been infected by a treatment can also start to wander out more. Some of the treatment can cause them to become irritated and uncomfortable in their hiding spots, and disoriented as they start to die, so they may begin to crawl out into your home. Seeing them is, most of the time, a good thing. They will soon die off.

The sequence behind a pest control visit, inspection, exterior perimeter, targeted interior work where needed, makes the process easier to follow and easier to trust. ExtermPRO provides bi-monthly and quarterly pest control plans built around this exact structure for homes across Gainesville, Haymarket, Bristow, Centreville, and the rest of Northern Virginia. Call 571-620-1168 to schedule a visit or ask about what to expect at your specific property.