Soil Poisoning in Durban for Builders, Foundations and New Builds with a certificate for NHBRC
Pre-construction and post-construction soil poisoning applied to trenches, foundations and surface beds by a registered pest control operator, scheduled around your slab date so it does not hold up the build.
Soil poisoning places a treated zone of soil between subterranean termites and the structure sitting on top of it. On most sites there is one narrow window to do the under-slab portion properly, which is the stretch between the trenches being ready and the concrete being poured.
What Is Soil Poisoning in Construction?
Soil poisoning is a pre-construction termite treatment. A registered soil insecticide is applied to the ground under and around a building’s foundations before the slab is cast, so termites can’t tunnel up through the floor or into the timber later on. On a new build it’s done in stages: the trenches and footings, the surface bed before the slab, and the perimeter once backfilling is finished.
It’s a requirement on most new builds in KwaZulu-Natal, and the soil poisoning certificate that follows goes into the NHBRC and bank paperwork. If your slab is already down, there’s still a post-construction option, covered further down this page.
Soil Poisoning Services for Durban Builders, Developers and Property Owners
Soil poisoning, also known as pre-construction termite treatment, is the application of a registered soil insecticide to the ground a building will sit on and the ground immediately around it. Duguza Pest Control has been doing this work on residential and commercial sites across the metro for over 30 years, as part of the same Durban pest control operation that handles day to day treatments for homes and businesses. Whether you are a builder who needs the site treated before slab-down, a developer working to an NHBRC programme, or an owner protecting a structure that was never treated when it went up, the treatment is carried out by a registered operator and documented.
Soil Poisoning Treatments We Carry Out
Pre-construction, post-construction and remedial soil treatment for termite protection.
How Much Is Soil Poisoning per Square Metre?
Pre-construction soil poisoning in South Africa typically starts from about R3.50 per square metre of building footprint, plus the trench lines. The final figure depends on the size of the footprint, how many visits the build sequence needs and whether you need the certificate issued on completion.
We price per site once we’ve seen the plans, and the quote is in writing before we start. Already have a written quote from another registered operator for the same scope? Send it through and we’ll beat it. You can also see our full Durban price list.
Building or Renovating? Wood Borer and Termite Treatment Too
Builders often need more than the soil treated. We also treat roof timbers for wood borer and existing structures for termites, so one operator can handle the pest side of the job from slab to roof. When the work is done, we issue the soil poisoning certificate for your completion pack.
Where Soil Poisoning Fits Into the Build Sequence
Trenches and Footings, Before Backfill
Once the trenches are excavated and the footings are in, the open soil along the trench lines is treated. This is the part of the job that gets buried permanently, so it has to happen while the trenches are still accessible.
Surface Beds, Before the Slab Is Cast
The full footprint of prepared soil under the surface bed is treated immediately before the concrete goes down. It is the only point in the programme where the entire area beneath the building is open and reachable, which is why we ask builders for the slab date up front.
Perimeter, Once Backfilling Is Done
After backfilling, the soil around the outside of the foundation wall is treated to close off the route termites take up against the structure. On larger sites this is often a return visit timed to the backfill.
Slab Already Down? There Is Still an Option
Where the concrete has been cast and the under-slab window has closed, treatment moves to a post-construction approach around the perimeter and at service penetrations. It is a different method to pre-construction work and we will say so plainly rather than quote you for something the site no longer allows.
What the Standards Say About Soil Poisoning
There is a lot of vague wording online about soil poisoning being “required by law” in South Africa. Here is the accurate version, so you know what your local authority, your architect and the NHBRC are working from.
SANS 10400-F: Site Operations
Clause F5 of the National Building Regulations covers protection from subterranean termite activity. It applies where the local authority requires it, or in areas of high termite infestation. That is a conditional requirement rather than a blanket national one, so the first question on any site is what your local authority expects.
SANS 10124: The Application of Soil Insecticides for the Protection of Buildings
This is the standard the treatment itself is measured against. SANS 10400-F treats the termite protection requirement as satisfied where soil insecticides are applied in line with SANS 10124, or where an approved physical barrier carrying an Agrément certificate is installed instead.
Act 36 of 1947
The products used in soil poisoning are registered agricultural remedies, and the person applying them has to be a registered pest control operator. Duguza operates under registration P54412 for structural pest control, and the registration certificate is linked above if your quantity surveyor or site agent wants it on file.
NHBRC and Bank Requirements
On NHBRC-registered builds, proof of termite pre-treatment is commonly asked for as part of foundation sign-off, and banks sometimes ask for it on transfer. The treatment and the paperwork are two separate things, and we cover the documentation side on our soil poisoning certificates page.
Soil Poisoning for Termites on the Durban Coast
Warm, Humid and Year-Round
Subterranean termites need warmth and moisture, and coastal KwaZulu-Natal supplies both for most of the year. Colonies stay active through winter here in a way they do not on the Highveld, which is part of why untreated ground under a Durban slab is worth taking seriously.
What Soil Poisoning Does and Does Not Cover
Soil treatment works on termites that approach a building through the ground. Drywood termites, which are common in KwaZulu-Natal, get into timber directly and are not stopped by a treated soil zone. Wood borer is different again. If we find either during a site visit we will tell you what it needs instead of treating the soil and calling it solved.
Older Suburbs, Untreated Ground
Plenty of homes in the established suburbs went up before pre-construction treatment was routine, or were treated decades ago. Perimeter soil treatment is the practical route on those properties, and it pairs with remedial work covered on our termite treatment page.
Sites Across the Metro
We work from the North Coast through to the South Coast and inland to the Upper Highway area, including Umhlanga, Ballito, Mount Edgecombe, Durban North, Westville, Pinetown, Hillcrest, Chatsworth, Phoenix and Amanzimtoti.
Why Builders Use Duguza for Soil Poisoning
30+ Years of Structural Pest Work
Mark Abraham has been in structural pest control since he was 16 and has treated soil on residential and commercial sites across Durban and KwaZulu-Natal for decades. You deal with the operator, not a call centre.
We Work to Your Programme
Soil poisoning sits between two trades on a build schedule, and a late applicator costs you a day. Give us the slab date and the backfill date and we will fit around them.
Registered, Documented Treatment
Every treatment is carried out under our Department of Agriculture registration, using registered products, and recorded in a certificate that names the site, the date, the product and the area treated.
One Operator for the Whole Site
The same registration covers soil poisoning, borer and beetle work, and the ongoing commercial treatments a completed development needs, which keeps the paperwork consistent across a project.
Soil Poisoning on Building Sites Across Durban
We treat new builds and extensions on sites across Greater Durban, including the growth areas of Hillcrest, Gillitts, Kloof, Mount Edgecombe, Umhlanga, Verulam, Tongaat and Phoenix. See every suburb we cover on our pest control areas page.
Soil poisoning is one of several compliance certificates we issue for Durban properties.
Need Soil Poisoning on a Durban Site?
Send us the building footprint and your slab date, and we will come out, assess the site and quote.
Frequently Asked Questions (FAQs)
How is soil poisoning quantified and priced?
Quantities come off the building footprint in square metres plus the length of the trench lines, with soil type and site access affecting the job. That is why we assess the site rather than quote off a plan alone, and why a rate quoted over the phone without those numbers is a guess.
Does soil poisoning have to happen before the slab is cast?
The under-slab portion does. Once concrete covers the footprint, the soil beneath it cannot be treated directly, so that part of the work has to be done in the window between the ground being prepared and the pour. Perimeter treatment can follow later, after backfilling.
Is soil poisoning a legal requirement in South Africa?
It is a conditional requirement. SANS 10400-F, clause F5, calls for protection from subterranean termite activity where the local authority requires it or in areas of high termite infestation, and the requirement is treated as met where soil insecticides are applied in accordance with SANS 10124. Your local authority and, on NHBRC builds, the council’s own requirements determine what applies to your site.
Will soil poisoning stop drywood termites and wood borer?
No. A treated soil zone works on termites that reach the building through the ground. Drywood termites enter timber directly and wood borer beetles lay into the timber itself, so both need timber-directed treatment. We will identify what is present before recommending anything.
Is soil poisoning safe around site staff, neighbours and boreholes?
The products used are registered agricultural remedies applied at label rates by a registered operator, with the application confined to the soil beneath and around the structure. We take site-specific factors such as watercourses, boreholes and adjacent gardens into account when selecting the product and method.
Can soil poisoning be done on a partially built site?
Yes, and it is common. Sites often come to us mid-programme with trenches open and footings in, or with the slab down and the perimeter still to backfill. We look at what is still accessible and treat accordingly.
How much is soil poisoning per square metre?
Pre-construction soil poisoning typically starts from about R3.50 per square metre of building footprint, plus trench lines. We quote each site in writing after seeing the plans, and we will beat any written quote for the same scope.
What is soil poisoning in construction?
It is a termite treatment applied to the soil under and around the foundations before the slab is cast, so termites cannot reach the building from below. It is usually done in stages during the build.
Our Other Compliance Services
Soil poisoning is usually the first pest control line item on a project and rarely the last. If it is the paperwork you need rather than the treatment itself, our soil poisoning certificates page covers the documentation side, we issue beetle certificates where borer is the concern, and for complex or disputed cases we can arrange a full entomologist report. Once a development is occupied it can go onto scheduled fumigation across Durban.