The Renovation That Made My Patient Sicker
By Lisa Waayer — Naturopath, Building Biologist & Low Tox Coach | ANTA & ASBB member
Short on energy? Here's the essence: Renovating to fix a damp or unhealthy home is often the right call – but conventional renovations can introduce a wave of new exposures (fresh paints, adhesives, new furnishings, disturbed dust and mould) that hit a sensitised person hardest. The renovation isn't the enemy; the sequencing and material choices are the variables. Plan those with health in mind and a renovation becomes part of the cure rather than a setback.
When fixing the house makes the person worse
A pattern I see often enough to write about: a family discovers their home has a damp or mould problem, does the responsible thing – renovates – and then watches the sensitive member of the household dip again just as the house is finally “fixed.” New kitchen, new paint, new carpet, symptoms return.
The confusion and guilt this creates are enormous. We did everything right. Why are they worse? For the person affected, it's more disorienting still – the renovation was supposed to be the finish line.
If this is your story, nothing about it means the house is cursed or the situation hopeless. It means two very fixable things usually went unaddressed: what the renovation released, and what it introduced.
What does a renovation release into the air?
Everything the building has accumulated: old dust and, critically, any mould contamination in the materials being removed. Without proper containment, opening up a water-damaged wall distributes its contents through the house. The problem doesn't leave in the skip bin; a portion of it relocates to the soft furnishings.
Then comes the new material load. Fresh paint, adhesives, sealants, engineered timber products, new carpet and new furniture all off-gas volatile compounds most intensely in the first weeks and months. A robust system might register it as “new house smell.” A sensitised system already primed by the original exposure can react to it as one more insult, right when the person expected relief.
This is the cruel irony: the people most likely to renovate for health reasons are exactly the people most vulnerable to a conventionally executed renovation. It's sharper again when the sensitive person is doing the work themselves: they're closest to the dust, fumes and freshly applied products, often for hours at a time.
Making decisions from lived experience, not fear
I understand this vulnerability personally. After my own illness from a water-damaged building, I've had to weigh material choices and budget in my own environment with a reactive body as the referee. That experience shaped the philosophy I bring to renovation planning: not the pursuit of an impossibly perfect build, but informed choices at the points that matter most, made calmly and within real budgets.
Because here's what the fear-based version of this advice misses: panic-renovating with only “natural” or low-VOC everything is expensive, sometimes impractical, and not always necessary. Precision beats purity.
How do I renovate without making someone sicker?
Remediate before you beautify, choose materials by exposure rather than aesthetics, plan off-gassing around the sensitive person (whether they move out or stay), and build their recovery into the project plan. The sequencing matters more than the budget.
What changes when a renovation is planned through a building biology and clinical lens:
• Remediation before beautification. Any mould-affected material is removed under proper containment, with the affected person's exposure managed. Ideally that means time away from the house during works, but that isn't always possible. When it isn't, this is where my naturopathy hat comes in: supporting the body so it copes better while the works happen around it. Fix the water problem causing the damage first, or the new finishes inherit the old fate.
• Materials chosen by exposure, not just aesthetics. Low-VOC paints and adhesives, careful choices on flooring and composite timber products, and attention to what the bedroom in particular will contain. The bedroom gets the strictest standards since it's where the sensitised person does their nightly eight hours.
• Off-gassing is scheduled, not ignored. New materials and furniture get ventilation time before the sensitive person uses the space. If they're living through the works, the heaviest off-gassing jobs are timed and aired around them, with the bedroom kept as a protected zone. A simple airing strategy costs nothing and prevents a great deal.
• The occupant's recovery is part of the project plan. This is the piece only the clinical lens adds: supporting the affected person's body before, during and after the works, so the project and the person cross the finish line together.
Planning a renovation, or recovering from one?
Both are the right time to talk. If you're planning works on a home someone sensitive lives in, an hour of health-focused planning can spare you the expensive version of this article. And if you've already renovated and someone got worse, that's recoverable, and working out why is exactly what I do. Book a consultation and we'll plan it properly, together.
Frequently Asked Questions
Why did my symptoms get worse after a renovation?
Most commonly: mould-affected materials were disturbed without containment, spreading contamination, and/or new materials introduced a concentrated wave of off-gassing that a sensitised system reacted to. Both are identifiable and addressable.
What are VOCs and how long do new materials off-gas?
Volatile organic compounds are chemicals released by paints, adhesives, new furnishings and some building products. Emission is heaviest in the early weeks and declines over months; ventilation can speed this up considerably. Beyond airing, I have further building biology and naturopathic strategies to reduce exposure and support the body through this window.
Do I need to use all-natural materials to renovate safely?
No. A well-sequenced renovation, with low-VOC selections at key points and strict standards for the bedroom, achieves most of the benefit without boutique-build costs. Targeted beats total.
Should the sensitive person leave the house during renovation?
For works involving mould remediation or heavy material installation, often yes, temporarily. The right call depends on the scope of works, the situation and the person's reactivity. This is exactly what we'd plan in advance, including how to support them if moving out isn't an option.
What if the person who's unwell is doing the renovation themselves?
Then they're closest to every exposure, so the plan matters even more. Leave mould-affected material removal, sanding or stripping older paint (pre-1970s paint may contain lead) and anything that might contain asbestos to licensed professionals. For the rest, wear a well-fitted respirator suited to the task, ventilate well, keep work sessions short, shower and change afterwards, and never sleep in the work zone. Naturopathic support for the duration of the project helps the body keep up.
Can you work alongside our builder?
Yes. My role is the health layer: remediation standards, material guidance, sequencing and clinical support for the affected person – alongside your builder's trade expertise.