Preventing Warping in Laminate Flooring: Everything You Need to Know

Will Laminate Flooring Warp?

Laminate flooring is a durable, affordable, and stylish flooring option, but it is not entirely immune to damage. One of the most common concerns homeowners face is whether laminate flooring can warp. The short answer is yes, but it typically happens due to moisture, temperature changes, or improper installation.

Understanding what causes warping and how to prevent it will help keep your laminate flooring in top condition for years.

What Causes Laminate Flooring to Warp?

1. Moisture and Water Damage

Laminate flooring is made with a fibreboard core, which is highly absorbent. If exposed to excessive moisture, the planks can swell, expand, or buckle.

• Spills left on the surface too long
• Water seeping through the seams
• High humidity or damp conditions
• Flooding or leaks from appliances

How to Prevent It:

• Wipe up spills immediately
• Use a water-resistant underlay in moisture-prone areas
• Consider waterproof laminate for kitchens and bathrooms

2. High Humidity and Temperature Changes

Laminate flooring expands and contracts with changes in temperature and humidity. If the air is too damp, the planks can absorb moisture and warp.

• Humid summers can cause expansion
• Dry winters can lead to contraction and gaps
• Poor ventilation increases moisture retention

How to Prevent It:

• Keep indoor humidity between 40-60%
• Use a dehumidifier in summer and a humidifier in winter
• Ensure proper ventilation, especially in humid rooms

3. Poor Installation

Incorrect installation can increase the risk of warping over time. The most common mistakes include:

• Not leaving an expansion gap around the edges of the room
• Installing laminate over an uneven subfloor
• Failing to use a moisture barrier on concrete subfloors

How to Prevent It:

• Leave a 10mm expansion gap around the edges
• Ensure the subfloor is level before installation
• Use a moisture barrier on concrete or in humid areas

4. Excessive Direct Sunlight

Prolonged exposure to direct sunlight can cause laminate flooring to dry out, fade, or warp.

How to Prevent It:

• Use curtains or blinds to reduce UV exposure
• Consider using a UV-protective laminate finish

5. Heavy Furniture or Impact Damage

Placing heavy furniture on laminate flooring without protection can cause denting or bending, leading to long-term warping.

How to Prevent It:

• Use felt pads under furniture legs
• Avoid dragging furniture across the floor
• Distribute weight evenly with area rugs

Signs That Laminate Flooring Is Warping

• Buckling – Planks lift or curve upward
• Cupping – Edges of the planks are higher than the centre
• Gapping – Separation between planks
• Swelling – Planks appear bloated or raised

If you notice these signs, it’s essential to identify the cause quickly to prevent further damage.

How to Fix Warped Laminate Flooring

1. Minor Warping (Small Lifts or Bends)

• Place a heavy object over the affected area to flatten it
• Use a dehumidifier to reduce moisture and see if the planks settle
• If the planks don’t return to normal, replacement may be needed

2. Warping Due to Water Damage

• Remove affected planks immediately to prevent mould growth
• Let the subfloor fully dry before installing replacements
• Use a moisture barrier to prevent future damage

3. Fixing Buckled or Lifted Laminate

• If caused by lack of an expansion gap, trim the flooring at the edges
• Reinstall planks with proper spacing
• If buckling is severe, replace damaged planks

Is Waterproof Laminate a Solution?

Many newer laminate products are labelled waterproof, meaning they have an enhanced core material and sealed edges that resist moisture better. While not 100% waterproof like vinyl flooring, they provide superior water resistance compared to standard laminate.

Best for:

• Kitchens
• Utility rooms
• High-traffic areas where spills are common

Conclusion

Laminate flooring can warp, but it is preventable with proper installation, moisture control, and regular maintenance.

• Avoid excessive moisture and clean spills immediately
• Control indoor humidity to prevent expansion and contraction
• Ensure proper installation with expansion gaps and a level subfloor
• Use protective measures like rugs, felt pads, and UV protection

With the right care, laminate flooring can last for many years without warping or damage.