Part 2 of 4: This is the second article in our four-part meth awareness series. In Part One: Why a Freshly Painted Ex-Rental Should Raise Questions, we explored why a clean, freshly painted property can still conceal a serious contamination issue. This article examines why the usual “obvious signs” are often absent, and why painting over the problem is not the solution.
For property managers and landlords in New Zealand, the signs of meth-related behaviour that trigger a legal obligation to protect the health and wellbeing of tenants are currently limited to police or council involvement. This means formal testing only occurs in approximately 1 in 200 rental properties each year.
Overseas property experts often point to visible signs that a house has been used for illicit activity. These can include a property being unusually trashed or filthy before a sudden renovation, strong chemical smells such as ammonia or vinegar, or dead vegetation in the yard where chemicals may have been dumped.
Sometimes that is the case. Signs of damage and rushed renovations are certainly worth noting. However, in many rental properties — especially those in nice neighbourhoods — the house itself may show none of these signs.
The property looks fine. In those instances, the real clues are often found in the behaviour of the tenants or occupants. More on that in a future article.
How we respond to adversity makes all the difference
For a decent, hard-working landlord or property manager who wants nothing to do with meth, the natural reaction is to jump straight into “fix-it” mode.
The danger of a “quick flip” or a fresh coat of paint is that it can create the impression the problem has been resolved. In reality, the issue has often just become more difficult and more expensive to deal with.
A fresh coat of paint is not the same as protection
Meth use and manufacture deposits residues onto all materials inside a rental property. Most building materials act like sponges — they are full of microscopic cracks and holes. Meth can stick to surfaces (adsorb) and penetrate into paints and building materials (absorb).
The longer the behaviour continues and the more residues are present in the air, the more they adsorb onto and absorb into these materials. While painting may improve the appearance of a property, it is not a contamination management process. Simply painting over affected surfaces may hide visible signs, but it does not address the underlying problem.
Even without new paint, meth residues can be wiped off a surface one day and, over time, “bleed” or migrate back to the surface. This also occurs through a new coat of paint. As a result, the contamination becomes hidden below the surface, making it harder to detect through sampling, while still continuing to emerge over time.
Why professional decontamination matters for rental properties
Professional decontamination contractors don’t just wipe surfaces.
The “triple wash” method is one of the reasons Kāinga Ora has spent tens of millions stripping out properties, while many private landlords have spent far less on non-destructive decontamination — even when using experienced contractors.
New meth regulations for rentals may lead some landlords and property managers to believe a DIY approach will be sufficient. Time will tell.
What sets professional decontamination contractors apart is their access to specialised chemicals that penetrate surfaces and break down meth molecules within the paint and substrate. Their experience also allows them to offer fixed-price contracts with the confidence that contamination will be reduced to acceptable levels. They return as often as required to achieve the result.
The metaphorical ‘icing on the cake’
Bleed-back within painted surfaces is well documented. The solution is not simply to apply more paint. The better approach is to finish redecoration with specialised, engineered surface protective coatings. These can be applied over standard paint, ideally before any issues arise or when a property is prepared for new tenants.
Unlike standard paint, these coatings help prevent bleed-back. They are also easy to clean using standard processes and products. While future meth problems don’t happen overnight, they can be resolved more quickly and at lower cost when protective coatings are in place. These coatings also help reduce standard wear and tear and inhibit mould growth — delivering real benefits in reduced maintenance costs and rental downtime.
Join the discussion on LinkedIn: Read the related post and share your perspective.