Treating an ant infestation is a fairly complicated process. Our ant treatment involves a significant amount of detective work, specialized interior baiting, and liquid chemical treatments, as well as an exterior chemical application to the home or building and various areas on the property.


When dealing with a potential ant infestation, the primary focus of our initial inspection is identification. During the inspection, our technician will do the following:

  • Identify the Species – Identifying the species of ant is critical in determining the best course of action regarding treatment. Common ants to the Pacific Northwest include odorous house ants, carpenter ants, pavement ants, moisture ants and thatching ants.

  • Identify the Location of Activity – We want to make sure that the chemical treatment is heavily focused on areas of high activity in order to deter future infestations.

  • Locate the Nest – Locating a nest site is ideal for a treatment, but not necessary. Our technicians will make every attempt to locate nesting sites in and around the property. If a nest is found, a chemical application will be made directly to the site.

  • Identify Food Sources – Finding food sources allows us to better tailor our treatment plan to your specific home or business. Oftentimes, locating and eliminating food sources allows us to drive infesting ants to our baits or through our liquid chemical applications.

  • Determine Conducive Conditions – There are numerous conducive conditions that can lead to or directly cause an ant infestation. For example, moisture problems, earth to wood contact, vegetation growing on or against the structure, and poor sanitation can all be problematic and facilitate ant infestations. Identifying contributing factors to the conducive conditions allows us to help our customers identify ways to prevent or mitigate future infestations.

Once we have completed our inspection, we will be able to determine how best to deal with the infestation and where to most effectively apply our treatment.


At Sentinel Pest Control, our job is to ensure that your home is free of pests year-round—our comprehensive service packages are designed to do just that! Tailor-made to meet the needs of Western Washington residents and businesses, our pest control service packages will both remove pest infestations and prevent future ones.

Interior Treatment

  • Interior treatments can include baiting and/or liquid sprays depending on the species of ant. Some species, like carpenter ants, may not require any interior work to be done. For safety reasons, it may be necessary for a customer to vacate the property for a short amount of time if certain products are used on the interior.

    Though some professional products require vacate times, the results can be well worth the time. Other products allow for homeowners to be present during the treatment and don’t require any vacate time.  We will determine which products are ideal for your situation, and customize a treatment plan with your needs in mind.

Exterior Treatment

  • An exterior application will also be made to the property. We provide 360-degree coverage of the property to catch any ants trailing into the home or building. A barrier along the foundation is applied to ensure that ants and other insects cannot access the home or building without coming into contact with our materials.

    Ants often trail along fence lines, walkways, patios, retaining walls, and driveways. All of these areas are treated in an effort to provide a thorough and all-encompassing solution to the problem. Outbuildings on the property are typically treated at no extra cost as well.

    Though our treatments are top-notch, you will not be ant-free overnight! The treatment takes time to work. Generally, you can expect to see ant activity for approximately two weeks following the initial treatment before it begins to subside.


Follow-up treatments and continued preventative maintenance are generally necessary for most species of ants. There are many variables that come into play when choosing a service program, such as the severity of the infestation, conducive conditions and location of the home/building. Even your neighbors play a role!

Once the infestation has fully subsided, we will ensure that the ants are unable to return by maintaining a protective barrier around the perimeter. There will always be ants and insects in the neighborhood, but we’ll make sure they don’t come back to your home.


We understand that your needs can be urgent. Our goal is to provide you with a pest-free home or business as quickly as possible. Call before noon Monday – Friday and a Sentinel professional will be at your door the SAME DAY!


Have any pest related questions or in need of pest control services?

Our office staff is trained to answer any pest control related questions! Once scheduled with us, an appointment confirmation will be emailed within 15 minutes with your appointment information and a picture of your technician!


We’ll give you a call and schedule the best time for you!





“While remodeling our house 4 years ago, we found termites in the walls. I called around and Sentinel Pest Control was able to come out the same day. They took a look at our problem and educated us our pest problem and provided us with the best solution…”

ALYSSA, Google Review

“I highly recommend the sentinel team to take care of your needs. They came out to my house after I saw some unwanted spiders and right away knew what they were and solved my problems. I was even able to message them pictures of the bugs…”

AJ, Google Review

“I had the pleasure of speaking with the service manager, Wayne. He was incredibly helpful and actually talked me out of hiring a professional exterminator. If I ever need pest control services I won’t call anybody else. Highly recommend calling them!”

VICTORIA, Google Review

“While remodeling our house 4 years ago, we found termites in the walls. I called around and Sentinel Pest Control was able to come out the same day. They took a look at our problem and educated us our pest problem and provided us with the best solution…”

LISA, Google Review

“I have been using these guys for over a year. My house has a greenbelt behind it and we used to have a lot of spiders and bugs in the house. Now it is very rare to find any! I have brought up concerns and they are very receptive and willing to listen and help anyway they can…”

TAMARA, Google Review

“I highly recommend this company for your pest control needs. We used Sentinel Pest Control yesterday for a yellow jacket removal and our technician Markus was very professional, knowledgeable & displayed caring and compassionate customer service…”

CRYSTAL, Google Review