10 Most common cork flooring problems and how to prevent them

Cork flooring is appreciated for its comfort, warmth, sound insulation, and sustainability. However, like any natural material, it is not immune to problems. 

Below, we break down the most frequent cork flooring problems, why they happen, and what you can do to fix or avoid them.

1. Scratches on cork flooring

Why it happens

Cork is softer than hardwood or tile. Although modern cork floors are protected by a polyurethane or protective finish layer, sharp objects, pet claws, and dragged furniture can scratch the surface.

How to fix it

• Light surface scratches can sometimes be improved with a manufacturer-approved touch-up product.
  
  

• In more severe cases, refinishing may be necessary, depending on the thickness of the wear layer.

How to prevent it

• Use felt pads under furniture legs.

• Avoid dragging heavy objects across the floor.

• Keep pet nails trimmed.

• Place rugs in high-traffic areas.

2. Dents and compression marks

Why it happens

Cork has natural elasticity. It compresses under pressure and often recovers its shape. However, heavy furniture, appliances, and high heels can cause deeper dents that may not fully rebound.

How to fix it

• Minor dents may recover naturally over time.

• Reducing weight on the affected area can help the cork expand back.

How to prevent it

• Use wide furniture pads to distribute weight evenly.

• Avoid concentrated loads in one small area.

• Choose higher density cork flooring for areas with heavy furniture.

For further information please read our article Here's why cork floors are very durable 

3. Water damage and moisture issues

Why it happens

Cork flooring is water resistant but not completely waterproof. Prolonged exposure to standing water can lead to swelling, staining, or deterioration of the core material.

Floating cork floors are especially vulnerable if water seeps between the joints.

How to fix it

• Dry spills immediately.

• In cases of swelling or warping, damaged planks may need to be replaced.

• For glue-down cork floors, resealing may be required if the finish has worn off.

How to prevent it

• Clean up spills promptly.

• Avoid wet mopping. Use a damp mop instead.

• Apply a protective sealant if recommended by the manufacturer.

• Consider alternative flooring for bathrooms or areas with frequent water exposure.

For further information please read our article: Are cork floors waterproof (and how to maintain them?)

4. Swelling or buckling

Why it happens

Cork expands when exposed to excess moisture or high humidity. If expansion gaps were not left during installation, the floor may buckle or lift.

High humidity, water leaks, or improper subfloor preparation can also cause this problem.

How to fix it

• Identify and resolve the moisture source.

• Remove and reinstall affected planks if necessary.

• In severe cases, professional assessment may be required.
  
  

How to prevent it

• Maintain indoor humidity between 40 and 60 percent.

• Ensure proper subfloor moisture testing before installation.

• Always leave expansion gaps around the perimeter.

For further information please read our article: What Happens If Cork Gets Wet? 

5. Gaps between cork planks

Why it happens

In very dry environments, cork flooring can shrink slightly, leading to visible gaps between planks. This is often seasonal and related to low humidity.

Improper acclimatisation before installation can also contribute.

How to fix it

• Increase indoor humidity to recommended levels.

• In minor cases, gaps may reduce naturally once humidity stabilises.

• Severe gaps may require plank replacement.

How to prevent it

• Allow cork flooring to acclimatise for at least 48 hours before installation.

• Maintain stable indoor climate conditions year-round.

For further information please read our article: Cork wall tile shrinkage - common causes and how to fix it

6. Fading and discoloration

Why it happens

Cork flooring can fade when exposed to prolonged direct sunlight. Ultraviolet rays gradually alter the colour of the surface.

Area rugs and furniture can also cause uneven fading, creating visible contrast when moved.

How to fix it

• Minor fading is usually cosmetic and does not affect performance.

• Rearranging rugs and furniture periodically can help balance colour exposure.

How to prevent it

• Use curtains or blinds to reduce direct sunlight.

• Choose cork flooring with UV-resistant finishes when possible.

7. Peeling or worn finish

Why it happens

Over time, heavy foot traffic can wear down the protective finish layer. Poor quality products or improper cleaning methods may accelerate this process.

Harsh chemicals and steam cleaners can damage the surface.

How to fix it

• Light wear may be addressed with a new coat of finish if compatible with the product.

• Severely worn floors may require sanding and refinishing, if the construction allows.

How to prevent it

• Follow manufacturer cleaning recommendations.

• Avoid abrasive cleaners and steam mops.

• Place protective mats at entrances.

8. Noise and movement in floating cork floors

Why it happens

Floating cork floors rely on a click-lock system. If the subfloor is uneven or the underlayment is incorrect, you may notice clicking sounds or slight movement.

Improper installation is often the root cause.

How to fix it

• Inspect the subfloor for uneven areas.

• Reinstall affected sections if locking mechanisms were not properly engaged.

How to prevent it

• Ensure the subfloor is level and clean before installation.

• Use the recommended underlayment.

• Follow installation guidelines carefully.

9. Installation mistakes

Why it happens

Many cork flooring problems stem from incorrect installation. Common errors include:

• Skipping acclimatisation

• Failing to test subfloor moisture

• Not leaving expansion gaps

• Using incorrect adhesive for glue-down floors

How to fix it

Depending on the issue, partial or full reinstallation may be necessary. Professional evaluation is often advisable when structural problems occur.

How to prevent it

• Follow manufacturer instructions precisely.

• Consider professional installation, especially for large areas.

• Ensure environmental conditions are stable before and after installation.

10. Maintenance mistakes

Why it happens

Improper cleaning is a frequent cause of cork flooring damage. Excess water, steam mops, and harsh chemicals can compromise the protective layer.

How to fix it

• Stop using damaging cleaning methods immediately.

• Reapply finish if recommended and possible.

How to prevent it

• Sweep or vacuum regularly.

• Use a slightly damp mop, not a wet one.

• Avoid ammonia-based or abrasive cleaners.

For further information please read our article: The Best Way to Clean Cork Floors (Without Damaging Them) 

Are cork flooring problems common compared to other floors?

Every flooring type has weaknesses. Hardwood scratches and warps with moisture. Laminate can swell irreversibly when exposed to water. Vinyl can dent and fade.

Cork flooring problems are often linked to environmental conditions and installation quality rather than inherent material failure. When properly installed and maintained, cork floors can perform reliably for many years.

Conclusion

Cork flooring offers comfort, sustainability, and natural beauty, but like any material, it comes with potential challenges. The most common cork flooring problems include scratches, dents, moisture damage, swelling, gaps, fading, finish wear, and installation-related issues.

The good news is that most of these problems are preventable. Proper acclimatisation, correct installation, humidity control, and appropriate maintenance significantly reduce risk.

Portuguese Treasures offers a wide range of cork flooring suitable for indoor spaces, as well as cork flooring accessories to help protect and extend your flooring’s resistance and durability.