Think you might need borer treatment?

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borer treatment

It may not be as bad as you think. Book one of our independent house inspections for peace of mind – it will likely save you thousands in unnecessary borer treatment costs.

Info about borer treatment


$253.00 Full roof-space and sub-floor inspection.

From $253.00 internal borer flight season treatment. The best time to get it done is October to be prepared for borer flight season November to January.

If a full sub-floor and/or roof treatment is required, we will provide a quote as an item on the inspection report.

More about borer and borer treatment

Borer are not well understood in New Zealand. When homeowners think of borer, they fear their home is going to collapse in a year or two, like in Australia with the aggressive subterranean termites.

Well put your mind at ease. We don’t have these type of termites in NZ and our borer species are all fairly non-aggressive. We rarely find major problems in the wooden structure of homes. In most cases no borer treatment is required, and only minor work needs to be done, if anything at all.

Commonly asked questions we get from worried homeowners are:

I’ve noticed borer holes in my home. Is it active?

If the borer is active, you’ll notice sawdust coming out of the hole or in a small pile on floors and ledges underneath holes. In Auckland, the sawdust is most likely to appear between November & January. This is borer flight season, the time when the adult borer beetles are emerging from the wood. The emerging adult borer beetles are what cause the visible holes and sawdust.

A good way to tell if holes are new or not is to look at them with a magnifying glass. If they look crisp and clean, they’re probably new holes. If they look dull because of dust and paint build-up, they’re likely to be old borer holes.

Will the borer spread from the infested wood to surrounding timber?

Unlikely. Borer like softer un-treated sapwood timber with a reasonable level of moisture in it. They’ve attacked the infested timber because it meets these criteria. They’ve probably moved into some untreated pine used as shelving or bracing for water pipes, or the odd bit of sapwood that was used in the original construction.

Most NZ homes are made with treated timber or harder heartwood timbers. These are unsuitable for borer habitation.

If harder heartwood becomes infested it is usually a maintenance issue rather than a borer issue. Weathered paint or water leaks that allow moisture to enter the timber and soften it enough for borer to attack.

Do borer bombs work?

No. Borer bombs will only kill the adult borer beetles that are out of the wood. It won’t kill the borer larvae that are doing the real damage inside the wood and the fumes will only be effective while they are present. These will usually clear out within an hour or two.

If you want advice on borer treatment and the options that will suit your home and property best, feel free to give Bug King team a call on 0800 54 64 54.

What we do

Borer inspections

A full inspection including getting in the roof space and under the sub-floor. Inspecting exposed internal timber and external weather-boards if required.

We will provide a report detailing the borer type, level and spread of the infestation and recommendations on borer treatment to gain control of any borer issues, including pricing.

If any major work is required, we encourage customers to get competing quotes using our borer report as a scoping document.

Internal borer flight season treatment

Treating internal timber is difficult as the active ingredient is unable to penetrate the timber due to paint and varnish.

A residual surface borer treatment can be applied to wooden surfaces throughout your home in October to kill any emerging adult borer beetles over the November to January flight season. This stops them laying eggs in the exit holes and breaks the borer life-cycle.

The treatment needs to be completed four years in a row as the borer life-cycle is 3-4 years.

Roof-space and sub-floor treatments

These are one-off borer treatments as the active ingredient can penetrate the bare timber. A treatment is applied directly to all timber surfaces. The treatment soaks into the timber and borer larvae and pupae are killed as they consume it.

The treatment will provide borer stopping power for at least 5 years.

Preparation & Aftercare

For roof-space and sub-floor treatments, no preparation or aftercare is required.

Please note: insulation may need to be removed to fully access infested timber.

For internal treatments the following preparations need to be made;

  • Cover or put away exposed foods like fruit bowls, etc.
  • Put clean dishes, tea towels and paper towels away. It’s OK to leave dishes out if they’re going to be washed. 
  • Put away toothbrushes, towels and toilet paper
  • Cover fish tanks and turn the pump off.
  • Ensure pet food is covered or put away
  • Pull the duvet up to cover all pillows on the bed and cover any cots.
  • You will need to vacate your home for a minimum of 4 hours from the time the treatment is completed.

Aftercare for internal borer treatments;

  • On return, enter your home and open windows and doors and allow to air for 10mins.
  • Wipe down all food preparation surfaces. We recommend using rubber gloves while doing this and being conscious of not rubbing your eyes until the gloves are removed.

Our internal treatments use synthetic pyrethroids (which are based on natural pyrethrums). The products we use have been proven safe in sensitive situations over several decades. All treatments are professionally applied and are at a level that are very safe for humans and pets. All products are readily metabolized. If you do come into contact with the treatment it will just pass straight through you and not build up in your body over time.


It’s always good to take someone else’s word for it!  Read what our customers have said about us following a successful pest removal. We can also arrange for you to speak directly to someone who has used our services, as we appreciate that you need to be absolutely certain about how our pest control works before you ask us into your home. 

Kate Gooch
Kate Gooch
November 27, 2022.
Excellent service and after care to ensure I was a very happy customer with no ants!
Richenda Oh
Richenda Oh
November 16, 2022.
Use this guy! He is good, was down to earth, upfront and easily and quickly told us which rodents we had where and how to get rid of them.
Rebecca Yeng Tung
Rebecca Yeng Tung
October 30, 2022.
So this is my second time using Bug King, I had used them last year, since then we have bought a new home and the previous owners had a dog so naturally how new home had fleas which was biting my young children at night. Just like my 5 star experience before we go the same 5 star treatment second time around. Mo was once again earlier than expected which was great he did what he had to and went over and beyond what we expected. Yvette in the office was a breeze to work with. My kids have not been bitten since so I am one happy mum with happy kids! I didn't expect anything less from Bug King and as long as the awesome service doesn't change I will always be a loyal customer if I do anything done at my house they will always be my first point of contact! Thanks again Mo and Yvette best in business!
Tas Matiatos
Tas Matiatos
August 23, 2022.
Thank you to the team at Bugking. Perfect result, the insect problem has gone! Friendly staff and very professional. Highly recommend.
Grace Vujnovich
Grace Vujnovich
August 17, 2022.
Great experience working with the Bug King team. Mark was professional and friendly and haven't seen an ant since :)
Mark Leslie
Mark Leslie
May 11, 2022.
We've just had our final inspection completed, and have been thoroughly impressed by Bug King's responsiveness and service. Mo was a pleasure to deal with! Thank you Bug King for all your assistance, and putting our minds at ease!
Ross Bymolt
Ross Bymolt
April 14, 2022.
The previous tenants had 3 pets who clearly had thousands of their own pets! After 9 flea bombs, we admitted defeat and I called Mark who was able to accommodate us the next day which was amazing. He explained the flea life cycle and why the bombs weren't working, and why his solution would. Half an hour later the house was treated, and so far so good! I definitely recommend Bug King for a top notch, professional service.