Is Laminate Flooring Really Waterproof?

There has always been a lot of confusion around laminate flooring. Some people are convinced that modern laminate is waterproof, while others argue that this is nothing more than marketing language. The truth sits somewhere in between, but to understand it properly, we need to step back and clarify a more fundamental idea.

Before discussing laminate itself, it’s important to distinguish between material waterproofing and system waterproofing. These two concepts are often mixed together, yet they describe completely different things.

When we talk about a material being waterproof, we mean that the material itself does not absorb water. A good example is hybrid SPC flooring. Its core is made from a mixture of stone powder and plastic, which creates a dense, non-porous structure. Even if you leave it submerged in water for a long time, it won’t swell or deform. In that sense, the material is genuinely waterproof.

However, real-world performance is rarely about material alone. This is where the idea of a waterproof system comes in. A bathroom is a perfect example. Tiles themselves are waterproof, but a bathroom only works because of everything around them — the waterproof membrane underneath, the sealing process during installation, and the silicone applied along edges and joints. These elements ensure that water does not travel beneath the surface or cause long-term damage. Only when all these parts work together can we say the system is waterproof.

With this distinction in mind, we can now return to laminate flooring.

At its core, laminate is made from compressed wood fibres bonded together with resin. This type of material is naturally porous. Once water penetrates it, the fibres expand, which leads to swelling, edge lifting, or even cracking. From a purely material perspective, laminate flooring is not waterproof — this is simply the nature of wood-based products.

The way laminate is installed further complicates the situation. It is typically laid as a floating floor, meaning the planks are connected to each other through click-lock joints and sit freely on an underlay without glue or nails. Around the perimeter, a gap is intentionally left to allow for natural expansion and contraction. This system works well for flexibility and efficiency, but it also creates pathways for water. If there is a leak or significant spill, water can travel through the joints or seep in from the edges, eventually becoming trapped underneath the flooring. Once that happens, it is difficult for the moisture to escape, and the damage continues over time, often accompanied by mould.

At this point, it becomes clear why many people insist that laminate is not waterproof. Both the material and the traditional installation system are vulnerable to water. Yet this is only part of the story, because modern laminate products have evolved significantly in response to these exact weaknesses.

Manufacturers have first improved the material itself by increasing the density of the core board. A denser structure reduces the rate at which water can penetrate, meaning that even when exposed to moisture for a period of time, the expansion can be minimal — sometimes so small that it is barely measurable. At the same time, the surface layers of laminate have been upgraded to be more resistant to water. These protective layers prevent water from easily reaching the core from above, which addresses one of the most common sources of damage.

The more interesting development, however, lies in the locking system. High-end laminate products now feature extremely tight joints, often treated with wax or similar sealing technologies. This significantly reduces the chance of water passing through the seams. In practical terms, some of these systems can hold water on the surface for days without allowing it to seep underneath. At this stage, laminate begins to behave less like a vulnerable material and more like a controlled system.

Even so, one weak point remains — the expansion gaps around the edges. Water can still enter from these areas if they are left untreated. This is where installation techniques become critical. In recent years, flexible waterproof sealants have been introduced to fill these gaps. These materials are designed to block water while still allowing the floor to expand and contract naturally. When this step is properly executed, it completes the system in a way that was not possible before.

Looking at all of this together, the answer becomes clearer. Traditional laminate flooring is not waterproof, neither in its material nor in its installation system. However, through a combination of denser cores, improved surface protection, advanced locking systems, and refined installation methods, modern laminate can achieve a very high level of water resistance — to the point where it is often described as “waterproof” in practical use.

Of course, this performance does not come without cost. In the Sydney market, standard laminate flooring might sit around $60 to $70 per square metre installed, while premium water-resistant laminate products, such as those from Quick-Step, can reach around $100 per square metre installed. The difference reflects not just the product itself, but also the higher demands on installation.

Ultimately, laminate flooring has always been a strong and versatile option. It offers a wide range of colours, excellent scratch resistance, good tolerance to temperature changes, and a relatively forgiving nature when it comes to subfloor conditions. With the introduction of modern water-resistant technologies, it has become even more competitive.

But the key is understanding what “waterproof” really means in this context. It is not an inherent property of laminate. Rather, it is the result of thoughtful design and careful installation working together. Once this is understood, the confusion around laminate flooring begins to disappear, and the product can be evaluated for what it truly is.