Are cork floors waterproof (and how to maintain them?)

In recent years, cork has been consistently gaining loyal fans among homeowners, who enjoy its comfort, its unique visual appeal and its eco-friendliness. For people who are still deciding whether to use cork in their homes, however, one question remains central: are cork floors waterproof?

A simple question, and the simplest answer is that cork floors are naturally water-resistant but not completely waterproof. With proper care, including regular sealing and maintenance, cork flooring can withstand water exposure without damage.

However, it’s important for anyone who has or is considering acquiring a cork flooring to have a fuller and clearer picture. That’s what we’ll try to give you in this article.

Are Cork Floors Waterproof?

To start off, it’s essential to differentiate between water-resistant and waterproof. Waterproof materials are completely impervious to water penetration, whereas water-resistant materials can withstand some moisture, but too much water over time can be a problem.

Cork flooring is naturally and robustly water-resistant, thanks to its structure at a microscopic level. Cork is made of tiny air-filled cells that act like shock absorbers, giving it its characteristic resilience, and make it buoyant and able to repel moisture – that is, to a degree, of course.

Therefore, it’s not fully waterproof, and without additional protection, if exposed to excessive or standing water for long periods, it can become susceptible to warping, swelling, or mould growth.

In consequence, it’s very important to enhance cork’s resistance to water by properly sealing it. Sealing a cork floor creates a protective barrier to shield the surface from liquids. This is always advised, and is particularly crucial in high-moisture areas like kitchens or bathrooms, to prevent the floors from degrading over time.

Why Sealing is Important for Cork Flooring

Sealing a cork floor makes it much more durable and resistant to moisture. A high-quality sealant, such as the Loba EasyFinish Matt, forms a protective layer that blocks water from penetrating. Aside from preventing water damage, it also helps to shield the floor from scratches, dirt and stains.

How Often Should You Seal Your Cork Floor?

This would depend on the level of foot traffic and exposure to water. Ideally, you should reseal a cork floor every 2–4 years or even more frequently in high-traffic areas or spaces prone to liquid spills, like kitchens or entryways.

It’s not that hard to do, though, and consistent resealing can do wonders for the lifespan of your floor and for helping to preserve its natural beauty.

How to Maintain Cork Floors to Protect Against Water Damage

Proper maintenance will keep your floor in good condition. Here is what you should pay attention to:

Regular Cleaning

Most of the maintenance will simply consist of sweeping or vacuuming the floor regularly, as that will take care of the dirt and debris that accumulates every day.

Every now and then, use a mop, but ensure it’s just damp and not too wet. A gentle cleaner specifically designed for cork or wood floors works best. Don’t use harsh chemicals or steam mops.

Spill Management

Cork floors are more forgiving when it comes to spills than many other types of flooring, but it's still important to clean up spills as soon as possible with a soft, absorbent cloth. If water or another liquid is left sitting on the surface for too long, it may infiltrate through the sealant and cause the cork to swell or warp.

Mats & Rugs

Placing mats or rugs in areas more prone to accidents, for example under sinks, is a smart and easy precaution. Just make sure the mats aren’t rubber-backed, as they could trap moisture underneath and eventually cause mould.

Resealing Schedule

We’ve already mentioned that occasionally resealing your cork floor is an excellent idea. Establish a resealing schedule based on the amount of wear and tear in your home, and mark it on your calendar.

Conclusion

Cork flooring offers an amazing blend of comfort, sustainability, and style to your home. Yet, like any other material, cork also has its vulnerabilities, and it’s important for homeowners to know that, while having decent resistance to water, it’s not waterproof.

With adequate sealing and maintenance, however, cork floors are a great option for areas of the house such as kitchens and entryways, where things may get a bit wet.

If you have any doubts about how to install or maintain your cork floors, consult with experts for professional advice.