Why Does My Renovated Kitchen Still Smell Weird Months Later?

A faint "new" smell can last a few weeks after a kitchen renovation, but an odor lingering past 2-3 months isn't normal. It's most often caused by trapped moisture behind a new counter or floor, adhesive or treated wood that wasn't ventilated properly, or a minor leak under the sink that was missed. It's not always dangerous, but a smell that's getting stronger or smells musty deserves a quick inspection to rule out hidden damage.

What's Happening?

After a renovation, several new materials (flooring adhesive, sealant, paint, engineered wood) release volatile organic compounds (VOCs) for a while. That's normal and usually fades within a few weeks with good ventilation.

Past that point, an odor that lingers or changes character (more earthy, more "musty," stronger in the morning) usually points to moisture trapped somewhere inside the new materials, often invisible since everything is now sealed behind new cabinets, a countertop, or flooring.

The smell can also come from a small water leak under the sink or dishwasher that started during the work but was never caught, because new materials hide early water traces well.

Is It Dangerous?

It depends on the cause, but it's generally not an immediate emergency. A slowly fading VOC smell isn't a long-term health risk. A lingering musty smell, on the other hand, deserves to be taken seriously.

Inspect right away if:

• The smell clearly resembles mold or damp earth, not "new construction"
• You see discoloration, swelling, or a stain on the floor, wall, or under the sink
• The smell is getting stronger over time instead of fading
• A family member develops respiratory symptoms or allergies that line up with when the smell started

Most Common Causes

Why This Happens in Quebec

Quebec's high summer humidity and big seasonal temperature swings slow down the full drying of building materials, even weeks after installation. A floor or counter installed during a humid stretch can trap that moisture underneath the surface.

Many renovated Quebec kitchens also sit in basements or on ground-floor concrete slabs, where ambient humidity is naturally higher, which favors mold growth if a material wasn't given enough time to fully dry before being sealed in.

How to Check It Yourself

You can do a simple, safe check:

• Open the cabinets under the sink and smell directly there; a stronger odor in that spot points to a localized leak or moisture
• Run your hand under the counter and along the floor seams to feel for softness, swelling, or dampness
• Check whether the smell changes with outdoor humidity (stronger on rainy days): that's a sign of trapped moisture
• Look under the sink with a flashlight for a water stain, even a small one

What you shouldn't do: pull up a section of flooring or countertop yourself to "see underneath," or use strong chemical products to mask the smell before identifying the cause. That can delay an important diagnosis and make a mold problem worse.

Can I Ignore It?

If the smell is faint, shows no signs of mold, and is slowly fading, you can wait a few more weeks while ventilating the room well. But if it persists past 3 months or smells musty, no, don't ignore it.

Trapped moisture left unaddressed can grow mold within just a few weeks, and it can spread behind cabinets or under the subfloor before it's ever visible. The longer you wait, the more likely the repair will require pulling out materials that were already newly installed.

How Much Does It Cost?

If the problem forces a significant redo of the installation, the cost can add onto the overall kitchen renovation budget, typically between $15,000 and $50,000.

When to Call a Professional

• If the smell persists past 3 months despite good ventilation
• If you notice a water stain, swelling, or discoloration near the sink or floor
• If the odor clearly smells musty rather than "new"
• If someone in the house has developed respiratory symptoms since the renovation
• If you're unsure about a plumbing connection installed during the work

Related Questions

• Why Is There a Gap Between My Counter and the Wall Since the Kitchen Renovation?
• Why Won't My New Kitchen Cabinets Close Properly Anymore After a Few Months?
• Why Does My Floor Creak More Than Before Since the Renovation?
• How Long Should I Really Wait Before Painting New Drywall?
• My Contractor Disappeared In the Middle of the Job — What Do I Do?
• Why Did My Renovation Quote Nearly Double Once the Work Started?