Pest Guides

How Long Does It Take for Exterminator To Work?

How Long Does It Take For Exterminator To Work?

Pest control takes different periods to work, depending on various factors.

Two major factors are determining how long extermination would work, the type of extermination, and the pests involved.

Preventive extermination usually takes a few minutes to work, while you may spend a long time if it is to remove the pests.

Some pests are more difficult to exterminate than others.


Your exterminator might give you different time frames to expect a positive result from the extermination exercise. Some of the things you should know about how extermination works are summarized in the following points:

  • Preventive treatments usually take about 15 to 30 minutes
  • Removal treatment can last up to a day
  • Cockroach removal treatment takes about 90 to 120 minutes
  • Removal of rodents can take up to 15 hours, depending on the level of infestation
  • Heat or chemical treatment does not usually take time unless the exterminator comes late or has issues with their equipment
  • Chemicals used during extermination last for 2-3 months before becoming biodegradable
  • Homeowners usually treat their homes for pests once or twice a year

When your exterminator gives you a timeframe under which they will be done with the pest control exercise or when you will start seeing positive results, do not be too quick to judge them.

This is because several factors determine the length of an extermination exercise.

Also, the size of your property would determine how long it would take for the extermination to work.

We will discuss the different factors that come into play regarding the extermination of pests. We would also answer FAQs that would guide you.

Continue reading to broaden your knowledge of factors determining how long an extermination would work.

Factors That Determine How Long It Takes for an Extermination To Work

Factors That Determine How Long It Takes For An Extermination To Work

After an extermination exercise, you might expect results almost immediately because of the time and resources you have spent on the exercise.

However, it is important to note that extermination does not remove all your bug problems immediately.

Professional treatment can take as long as six weeks to remove your pests.

Also, pest professionals advise that the slower route is better because it is a long-term solution that makes the pest take the treatment to their nests to wipe out their colonies from the source.

The timeframe for a successful evacuation of pests usually depends on various factors such as:

1. The Nature of the Extermination

The Nature Of The Extermination

This major factor determines how long it would take extermination to work.

The time is shorter for preventive, chemical, and heat treatment because the pests have not entered the home. However, the case is different if it is a removal treatment.

This is because the pest professional has to identify the pests, find their harborage, discover the root cause, and exterminate the pests.

It usually takes a while to complete this exercise and even longer to completely remove the pests from home.

This is because the pests have already gained their ground in your home and need a multi-step treatment to remove them.

2. The Extent of Infestation

The Extent Of Infestation

The degree of the infestation in your home also determines how long it would take for you to see results after extermination.

If the infestation is early and the pests have not fully gained their foothold in your home, it might take less than six weeks to see results.

However, if the infestation has gotten to the stage where you have a foul smell or droppings around your home, it might take six weeks or more to recover from the pests, despite the extermination fully.

3. The Type of Pests Involved

The Type Of Pests Involved

Some pests are more difficult to eradicate than others.

If you have pests like bedbugs, termites, or cockroaches, you might have to be very patient before seeing positive results.

These pests are peculiar because they have features that make them survive in the toughest conditions, and you may need to exterminate them up to twice before they completely leave.

In cases where you have a mixture of pests in your home, it might be more difficult to eradicate them because different solutions work best for the different pests.

4. The Size and Type of Your Property

The Size And Type Of Your Property

The bigger your home is, the longer it would take for your extermination to work. The reason for this is not far-fetched, as bigger spaces can contain more pests.

A big space tends to condone a severe infestation more than a small space. Hence, it would take longer for the extermination to work in your mansion.

The house’s structure also determines how long it would take to get rid of pests. If your house is built so that there are enough hiding places for pests, extermination may not work quickly in such a house.

Another factor to consider is the location of your property. Some areas are more susceptible to pests than others.

People who live in swampy areas tend to face recurring pest infestation and may experience more pests after extermination.


You cannot exactly predict the amount of time you have to wait before you start seeing positive results after extermination.

You should consider several factors when waiting for your extermination to work.

Some of these factors include the nature of the extermination, the type of pests involved, the level of the infestation, and the type of your property.

Frequently Asked Questions

How Long Do You Have To Leave Your Home After Extermination?

Some of the chemicals pest professionals use during extermination are harmful to humans.

Therefore it is advisable to leave your house for some time till the chemicals dry. Generally, pest professionals recommend at least 30 minutes to let the chemicals dry.

However, it is best to follow the advice of your pest control company because there are many different chemicals.

What Are the Factors That Delay Treatment?

  • Unavailability of a treatment appointment
  • Failure to change habits that cause pest infestation, such as keeping food crumbs
  • Failure to disclose full details of infestation with the pest professionals
  • Presence of heavy appliances that are difficult to move
  • Discovering more infestations different from the prior treatments

Leave a Comment

Your email address will not be published. Required fields are marked *