Why Waterproof Laminate Still Swells at the Joints What Every Buyer Should Know
Waterproof laminate is advertised as waterproof. But many homeowners find that water damage still occurs at the joints between planks. This is not a lie from manufacturers. It is a limitation of the product design that every buyer should understand before purchasing.
How Water Reaches the Core
The surface of waterproof laminate is sealed. Water sitting on top of the plank does not penetrate. The problem is the joint between two planks. The locking mechanism has a small gap where water can enter. Capillary action pulls water into this gap.
Once water enters the locking joint, it reaches the edge of the HDF core. The HDF core contains compressed wood fiber. Wood fiber absorbs water. The core swells at the edges. The swelling pushes the planks apart and creates a visible ridge.
This happens with all laminate products. The difference is the speed. Standard laminate swells within hours. Water resistant laminate lasts 48 to 100 hours. Premium waterproof laminate can last 500 hours. But all will eventually swell if water sits in the joints.
Manufacturer Testing vs Real World
Manufacturers test waterproof laminate by placing water on the surface. The surface repels water. This is the basis for the waterproof claim. But in real world conditions, water finds the joints. Spills spread across the surface and pool at the lowest point. The lowest point is usually a joint between planks.
The EN 317 test submerges the entire plank in water. This measures how much the core material swells. But it does not test the joint performance. A product can pass EN 317 with 5 percent swell and still fail at the joints in real world conditions.
Reducing the Risk
Choose a product with sealed joint technology. Some manufacturers apply wax or sealant to the locking edges. This helps slow water penetration. No sealant makes the joint fully waterproof.
Install with glue in the locking mechanism. Some waterproof laminate products allow gluing the joints. The glue creates a water barrier. Check the manufacturer instructions before using glue.
Use silicone caulk at the perimeter of the room. This prevents water from reaching the edges of the floor. In kitchens and bathrooms, caulk all edges thoroughly.
Wipe spills promptly. Even with premium waterproof laminate, do not let water sit on the floor for extended periods.
About PROLEADER
PROLEADER offers waterproof laminate with sealed joint technology. The swell rate under EN 317 is 5 to 8 percent depending on the product line. Contact us for product specifications.
