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Article posted on May 13, 2025

Chemical Termite Barriers 101 – How They Work, Safety, Installation and Cost

It’s estimated that as many as 1 in 3 properties in Australia are affected by termites. At least 50% of homes with active infestations could have been better protected with precautionary measures such as termite barriers, baits, and traps.

Unfortunately, this is not always the case.

Termite infestations, especially undetected ones, can cause significant structural damage, often leading to costly repairs. That’s why it’s essential for property owners to take all necessary steps to protect their homes and businesses from termite damage.

What is a Termite Chemical Barrier?

A termite chemical barrier is a specially treated zone that surrounds the perimeter of a property or building. The treatment is applied beneath the ground, designed to disrupt the termites’ natural path. These barriers are created using chemicals that prevent termites from breaching the treated area and gaining access to your property. Termites that come into direct contact with the barrier are killed, and the effects of the chemical are passed through the colony, eventually killing the entire group.

How Do Termite Chemical Barriers Work?

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Before installing a chemical termite barrier, a thorough termite inspection is essential to ensure no active termites are present. If live termites are found within the property, treatment is carried out immediately, followed by a follow-up inspection 21 days later to confirm successful removal.

Once no active termites are detected, the barrier installation can proceed. The process involves digging a trench around the building’s perimeter, exposing the footings. This trench is then filled with a termiticide chemical mixed with water, which binds with the soil. As termites move through the soil in search of food, they come into contact with the barrier and are killed off by the termiticide.

The industry-leading product for chemical termite barriers is Termidor, known for its “transfer effect.” This effect means that the chemical not only kills the termites that come into direct contact with it but also spreads through the colony, ensuring complete eradication.

Termiticides are far more effective than repellents, which merely deter termites without eradicating the colony.

Chemical Barriers vs. Traditional Physical Termite Barriers

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For homes that have no physical termite barrier in place, chemical termite barriers provide an excellent preventative solution. They offer protection without requiring structural alterations to the building.

In contrast, newer homes are often built with physical termite barriers, such as treated plastic or metal mesh sheeting placed under or around the edges of the concrete slab during construction. These physical barriers are effective for long-term protection, with a lifespan of up to 50 years.

However, for homes built before changes in building codes, chemical termite barriers are a viable alternative. They protect properties for up to 8 years, offering a significant benefit over physical barriers by killing termites and affecting the nest with the transfer of lethal chemicals.

When combined, chemical and physical barriers provide the most effective termite protection.

How Long Do Chemical Barriers Last?

termidor termite protection imagePest-Ex uses only high quality Termidor chemical barriers which last 8 years.

These barriers all come with a $2 million dollar assurance warranty from BASF Termidor. All of our installations are carried out in strict accordance with Australian standards, and as Termidor trained professionals, we are able to pass that assurance onto our customers.

All chemical barriers installed by us are certified. Upon completion of the install, this certification is acknowledged by BASF, and the customer receives the warranty certificate. It should be noted that this certificate of warranty is subject to 12 monthly inspections.

This is simply to ensure that your barrier is maintained to a high standard and also to ensure that we detect any potential disruptions to the barrier ahead of time before any termite damage occurs.

Benefits of a Termite Chemical Barrier

A termite chemical barrier offers numerous advantages in protecting your property from potential termite damage. Here are some key benefits:

  • Provides strong, long-lasting protection against termites by creating a treated zone around your property.
  • Prevents termites from entering and damaging your home.
  • A non-invasive solution that doesn’t require major structural changes.
  • It can last several years, reducing the risk of costly damage from termite infestations.
  • Scientifically proven to be highly effective in controlling and preventing termite activity.
  • Offers peace of mind, knowing your property is protected from termites.
  • Installation is quick and minimally disrupted by daily activities.
  • It targets areas where termites are most likely to enter, providing precise protection.
  • A cost-effective solution for termite prevention compared to other methods.

Chemical Barriers and the Safety of Children and Pets

The chemicals used in termite barriers are similar to those used in common pet flea treatments. Once the barrier is in place, it poses no immediate threat to children or pets. As the solution is liquid-based and injected into the soil, there’s no risk of exposure to those accessing the area.

However, as a precaution, we recommend keeping pets indoors while the barrier is applied. After the liquid barrier dries in about 3 hours, your children and pets can safely play in the yard.

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Cost of Termite Chemical Barriers

Prices for termite chemical barriers vary depending upon the size of the property being treated. Cost is calculated per lineal meter, so larger properties obviously cost more.

For an average sized 3 bedroom home on a typically sized block, prices start from $2,300. This of course comes with a guarantee, yearly termite inspections are recommended as per Australian standards , and will protect your property for 8 years. This may seem like an expensive option, but if you factor in the cost over an 8 year period, you’ll realise it’s much more economical than having to deal with facing costly repair bills.

It’s always best to have one of our pest controllers inspect your property in order to provide an accurate quote, but more importantly to ensure that a chemical barrier is a right option for you.

How Long Does Installation Take?

Similar to cost, the time that it can take for installation may vary depending on the size of your property and the area that needs to be protected.

Typically, we assign multiple technicians onsite to minimise installation times. To put an average sized barrier in place for a regular sized 3 bedroom home – with two technicians at work, and installation can usually be completed within 7-8 hours.  This means we can have your home protected from the threat of termites within a days of work.

Ready to work with Pest-Ex?

pest ex termite professionals imageIf you would like more information on our chemical termite barriers, or to discuss the best options for protecting your property against a costly termite infestation, please give us a call to schedule an appointment.

We’ll organise to have one of our pest control technicians inspect your property and provide you with a free quote, and to ensure that a chemical termite barrier is a right choice for you. If not, we’ll be able to provide another option that best suits your needs.

So give us a call today, we look forward to helping you.

Prevent infestations & protect your property

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5 Star Google reviews from both Gold Coast & Brisbane locations

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Kent Bailey
11 months ago
Just had my home barrier treatment for termites by Pest Ex. In every way a brilliant job and fantastic friendly service unlike...read more anything else I have struck on the Gold Coast. This is a very professional company and every person involved was excellent in every way. Strongly recommend them to all who read this review because you won't do better.
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Christie McCabe
a year ago
On time. Efficient. Friendly. Informative. Well priced. Our experience with Pest-Ex was easy from the moment Reception answered our call. Our routine...read more pest inspection could be done the next day (a Saturday which is most convenient for full time workers). Karl arrived at 7am with a smile to complete the service and carried out the work efficiently informing us of the process where required. Thanks team.
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Chris Burt
2 years ago
Very professional and able to identify our pest problem on the spot. Was on time and great communication with admin girls via...read more phone. Very conscious of keeping our pet safe after the treatment which was a classy touch. Highly recommend!
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Phill
6 months ago
Great people and always helpful and providing a good service.
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Lorrie Cruickshanks
a year ago
Thank you to Garyn who first identified the issues, he was extremely thorough and prompt and then to John and Janine and...read more the team who treated and area and placed the baits. The process was fully explained and they were extremely courteous and very professional. Thank you to all the team. The office also kept us up to date with when their representatives would be visiting and this is very much appreciated. Great work.
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Donna Hamerton
a year ago
After reading reviews, I'm glad that I chose Pest-Ex. Maria in the office was more than understanding to accommodate me and times....read more I was able to get a booking the same day I made the enquiry. Garyn my technician was even able to come earlier. When he arrived he was happy to explain everything that was going to happen and how to work around my pets and children.Need pest control done - hire these guys.
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Phoebe Worth
2 years ago
Impressed with the service. The technician Steve was on time, friendly and thorough - you could tell he was not rushing the...read more job. Will be using Pest-Ex again. Thanks guys!
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Mickey Ketch
a year ago
This company actually investigates the problem instead of just spraying your place and leaving. Very HIGH knowledge and experience in what they...read more do. They took the time to investigate the cause, the source of the problem and elimnated it completely which included going through every cupboard, cracks hiding spots the lot. We had a cochroach problem in our apartment for 3 months and we had 4 different companies come out and NONE of them investigated they only sprayed. After we called PestEx, Mr. Phillips was very knowledgeable and experienced eliminating our problem entirely. We also use PestEx in our shop and both Mr Phillips and Marty are EXCELLENT in resolving and maintaining pest problems. HIGHLY RECOMMEND PEST EX. BEST I'VE SEEN IN QUEENSLAND.