10 Reasons Laminate Floor is Buckling: Fix & Prevention

why is my laminate floor buckling

Laminate flooring has gained immense popularity recently for its aesthetic appeal, affordability, and durability. 

However, like all floorings, laminate has its challenges, one of the most common problems being buckling. 

Buckling refers to the warping or lifting of the flooring away from the subfloor, which not only mars the floor’s appearance but can also pose a trip hazard. 

Understanding the causes of this issue is crucial in preventing it and ensuring the longevity of your laminate floor. 

This blog post will delve into nine reasons your laminate floor might be buckling. We’ll also provide practical solutions to fix the problem and, importantly, measures to prevent future buckling. 

So, whether you’re a homeowner, a DIY enthusiast, or someone considering laminate flooring, you’ll find this guide insightful and useful.

Common Reasons Why Laminate Floors Buckle

1. Moisture and Water Damage

Laminate flooring is highly susceptible to moisture and water damage despite its durability and resilience. 

The layers that make up laminate flooring are not water-resistant, and prolonged exposure to moisture can lead to a host of problems.

How Moisture Affects Laminate 

When exposed to moisture over time, the core materials of laminate flooring—often made of high-density fiber—begin to swell. 

This swelling typically starts at the edges of the laminate planks, leading to buckling. The problem can worsen if the moisture seeps into the underlayer, leading to mold growth and further floor deterioration. 

Examples of Moisture-Related Issues

Some moisture-related issues are immediately noticeable, like buckling and warping. You might see visible deformation in the surface of the floor, and walking on it may feel uneven. 

In other cases, signs of damage might be subtler. For instance, you may notice a discolored area on the laminate or feel a soft spot underfoot. 

This could indicate a hidden water leak causing damage from beneath the floor. Mold and mildew growth is another serious consequence of prolonged moisture exposure, often indicated by a musty smell.

2. Improper Installation

As significant as moisture damage, improper installation can lead to buckling in laminate floors. 

The installation process’s quality can profoundly impact your flooring’s lifespan and performance. 

Importance of Correct Installation

Correct laminate flooring installation is paramount to the floor’s longevity and durability. The process requires meticulous planning, careful measurements, and adequate subfloor preparation. 

When installed properly, laminate flooring can withstand daily wear and tear and maintain its appearance for many years. 

It’s also more likely to withstand minor incidents of moisture exposure, temperature changes, and heavy foot traffic. 

Common Installation Mistakes and Their Consequences

Several common mistakes occur while installing laminate floors, each with its consequences. 

For instance, inadequate expansion gaps can lead to buckling as the floor has no space to expand during warm weather. 

Similarly, not acclimating the laminate to the room’s temperature and humidity levels before installation can cause warping or shrinkage later. 

Failing to prepare the subfloor correctly – not ensuring it is clean, dry, and level – can also result in an uneven floor and subsequent buckling. 

Lastly, using incorrect or insufficient underlayment can compromise the floor’s moisture barrier, leading to water damage and buckling over time. 

To avoid these issues, following the manufacturer’s installation instructions or hiring a professional installer with a proven track record and expertise in laminate flooring is crucial.

3. Subfloor Issues 

Identifying Subfloor Problems

Subfloor issues may not always be immediately apparent, but several signs can help you identify potential problems. 

These may include visible signs of mold or moisture, uneven surfaces, or loose areas under the existing flooring. 

Furthermore, if you notice any squeaking or movement when you walk across the floor, this can be a telltale sign of an unstable, damaged, or uneven subfloor. 

Using a long level or straight edge, any bumps or dips greater than 1/8” in a 6-foot radius may indicate subfloor problems. 

How Subfloor Issues Impact Laminate Flooring

Subfloor problems can have a significant impact on laminate flooring. For instance, moisture or mold in the subfloor can cause the laminate to warp or swell, compromising the integrity and lifespan of your flooring. 

Uneven subfloors can cause laminate planks to separate, crack, or even break under pressure, leading to an uneven floor surface and a potential trip hazard. 

On the other hand, a loose or unstable subfloor can lead to movement in the laminate flooring, which can cause squeaking, buckling, or damage to the locking system of the laminate planks. 

These issues underline the importance of thoroughly inspecting and preparing the subfloor before installing laminate flooring.

4. Insufficient Expansion Gaps

Expansion gaps are integral to any laminate flooring installation. Fundamentally, small spaces are left around the room’s perimeter, typically between the flooring and the wall. 

This gap allows for the natural expansion and contraction of the laminate material with changes in temperature and humidity. 

Under normal conditions, laminate flooring can expand and contract slightly. Without these gaps, the flooring has no space to move, which can lead to various problems.

Consequences of Inadequate Gaps

If the expansion gaps are inadequate or absent, significant issues can ensue. For instance, the laminate flooring can buckle or warp, creating an uneven floor surface that poses a trip hazard. 

Moreover, if the flooring expands too much without enough space, it can lead to pressure being applied on the laminate joints, causing them to weaken or even break. 

This can result in visible damage to the flooring, such as cracked or separated planks, and will likely necessitate repairs or replacement. 

Furthermore, inadequate expansion gaps can compromise the longevity and aesthetic appeal of your laminate flooring, undermining the investment made in your home’s interior.

5. Inadequate Underlayment

Underlayment plays a crucial role in a successful laminate flooring installation. It is a thin, soft pad made from foam, cork, or felt laid down on the subfloor before installing the laminate planks. 

The underlayment serves several purposes, including providing extra cushioning, noise reduction, and, most importantly, leveling out minor subfloor imperfections. 

It creates a smooth, stable base for the laminate material, ensuring a flat surface for the flooring installation.

Underlayment in Laminate Flooring

The underlayment is a barrier when installing laminate flooring, providing essential protection against moisture that could seep upwards from the subfloor. 

Moisture can cause laminate planks to swell, warp, or buckle, leading to noticeable damage and a reduction in the lifespan of the flooring. 

Moreover, a suitable underlayment can also provide thermal insulation, helping to keep the room comfortable in various weather conditions. 

Additionally, it can help reduce the sound of footsteps and other noise transmitted through the floor, offering a quieter, more peaceful home environment.

How Improper Underlayment Can Lead to Buckling

If the underlayment is not appropriately chosen and installed, it can lead to a series of issues, including the laminate flooring buckling. 

An inadequate underlayment may not provide sufficient leveling, leading to an uneven surface for the laminate planks. 

This can result in stress points where the flooring is not fully supported, causing the planks to buckle or warp over time. 

Similarly, if the underlayment does not provide adequate moisture protection, it can allow moisture to reach the laminate material, causing it to expand and buckle. 

Therefore, selecting the right underlayment and installing it correctly is crucial for preserving the integrity, appearance, and longevity of your laminate flooring.

6. Poor Quality Laminate

Choosing high-quality laminate flooring is essential for ensuring your floors’ longevity, durability, and overall appearance. 

High-quality laminate offers superior resistance to wear and tear, stains, and fading and is designed to closely replicate the appearance of natural materials such as wood or stone. 

Moreover, top-tier laminate flooring often comes with enhanced moisture resistance and a more substantial warranty, offering greater peace of mind for homeowners. 

In contrast, low-cost, low-quality options may appear appealing initially but likely disappoint in the long term. 

How Low-Quality Laminate Can Lead to Problems

Opting for low-quality laminate can lead to a multitude of issues. Inferior-quality laminate flooring is typically thinner, less durable, and more susceptible to damage, including scratching, staining, and fading. 

It also tends to have a less effective locking system, making it more prone to problems like gaps and buckling. 

Furthermore, low-quality laminate is often less moisture-resistant, increasing the risk of water damage, swelling, and warping. 

In worst-case scenarios, it can even result in the growth of mold and mildew. Investing in quality laminate flooring from the outset not only improves the aesthetic appeal of your space but also saves you from potential repair and replacement costs down the line.

7. Heavy Furniture or Objects

Regarding laminate flooring, heavy furniture or objects can cause significant damage if not managed properly. 

This is especially true if these items are frequently moved or have rough, sharp, or uneven bases. 

Without adequate protection, such elements can result in scratches, dents, or even cracks on the surface of your laminate flooring. 

The Impact of Heavy Objects on Laminate Flooring

Heavy furniture and objects exert substantial pressure on laminate flooring. Over time, this weight can cause indentations or depressions in the laminate material, leading to an uneven surface. 

Additionally, moving heavy objects across the floor without proper protection can lead to scratches, gouges, or tears in the surface layer of the laminate. 

The damage is not only unsightly but can also compromise the lifespan and functionality of your flooring. 

How to Protect Your Laminate from Heavy Loads

You can implement several effective measures to protect your laminate floors from heavy loads. 

Firstly, use furniture pads or coasters under the legs of heavy furniture to distribute the weight more evenly and prevent indentations. 

Secondly, lift rather than drag when moving heavy furniture to prevent disfiguring scratches. 

Lastly, consider using rugs or mats under extremely heavy objects or high-traffic areas to provide additional protection. 

By taking these steps, you can preserve the appearance and extend the life of your laminate flooring.

8. Temperature Fluctuations 

Like many other materials, laminate flooring is prone to the effects of temperature fluctuations. 

How Extreme Temperatures Affect Laminate 

High heat can cause the laminate to expand beyond its installation boundaries, leading to warping and buckling. 

These deformities can be unsightly, but more importantly, they can lead to lasting damage, increasing the likelihood of the laminate becoming unsecured and ultimately shortening its lifespan. 

Conversely, in very cold conditions, laminate can contract. If there’s a significant drop in temperature, the contraction can result in gaps and separations between the laminate boards, accumulating dirt and water causing further damage over time. 

Preventive Measures for Temperature-Related Buckling 

Maintaining a consistent indoor climate is crucial to prevent temperature-related buckling. 

Keep the temperature within the recommended range by the manufacturer, typically between 60 and 80 degrees Fahrenheit, and the relative humidity between 30% and 60%. 

Using a thermostat and a humidifier or dehumidifier can help control these conditions. 

Additionally, to reduce the impact of direct sunlight, which can heat certain floor areas, use curtains, blinds, or UV-protective window film. 

Undertaking these preventive measures will go a long way in maintaining the integrity and prolonging the life of your laminate flooring.

9. Temperature Fluctuations 

Temperature fluctuations significantly impact the longevity and appearance of laminate flooring. 

Understanding how extreme temperatures affect this material and implementing preventive measures can help maintain its integrity. 

How Extreme Temperatures Affect Laminate

Extreme temperatures can have adverse effects on laminate flooring. Laminate can expand beyond its installation boundaries when exposed to high heat, causing warping and buckling. 

This disrupts the aesthetics of your floor and can lead to lasting damage by unsecuring the laminate, thereby shortening its lifespan. 

On the other hand, in cold conditions, laminate contracts, which may lead to gaps and separations between the boards. These gaps can collect dirt and water, causing additional damage over time.

Preventive Measures for Temperature-Related Buckling

  • Maintaining a consistent indoor climate is crucial to prevent temperature-related buckling. 
  • Keep your indoor temperature and humidity levels to keep sudden changes to a minimum. Make sure your indoor climate remains- As much as possible, avoid direct contact with sunlight and other heat sources.
  • Use a rubber floor mat to insulate the laminate from cold surfaces such as concrete subfloor. 
  • Utilize area rugs in high-traffic areas of your home, as they can provide additional protection against extreme temperatures.
  • Regarding laminate flooring, taking preventive measures against extreme temperatures can help maintain its integrity and extend its longevity. 
  • Keep the indoor temperature and humidity levels within the recommended range by the manufacturer, typically between 60 and 80 degrees Fahrenheit, with relative humidity between 30 and 50%. 
  • Additionally, sudden temperature changes should be avoided, as they cause the laminate to expand or contract at an accelerated rate. 
  • Finally, proper ventilation also plays a role in maintaining a consistent indoor climate. Open windows when possible to ensure that your home is well-ventilated. 
  • This will help keep temperatures balanced and reduce the chance of buckling due to extreme

10. Lack of Maintenance 

Lack of maintenance can significantly contribute to the buckling of laminate flooring. Regular upkeep keeps your flooring looking its best and plays a pivotal role in preventing damage and ensuring longevity. 

The Role of Maintenance in Preventing Buckling

Maintaining your laminate flooring is crucial in preventing buckling. Regular cleaning can prevent dirt and debris buildup that could get stuck in the gaps and cause the boards to lift. 

Similarly, immediate attention to spills prevents water from seeping into the seams, which could cause the laminate to swell and buckle. 

Timely maintenance and repairs of minor damages can prevent them from escalating into major issues, such as buckling.

Simple Maintenance Tips to Prolong Laminate Life

Implementing a few simple maintenance habits can go a long way in extending the life of your laminate flooring and preventing buckling. 

Regularly sweep or vacuum your floor to remove dirt and debris. Use a damp mop instead of a wet one for deeper cleaning, as too much water can damage the laminate. 

Ideally, any spills should be wiped up immediately to prevent water damage. Using furniture pads under heavy items is also advisable to distribute weight evenly and reduce the risk of denting or buckling. 

Regularly inspect your floors for signs of damage and address issues as they arise to prevent further deterioration. 

Remember, preventive measures are always better than reactive ones regarding laminate flooring maintenance.

How to Fix Buckled Laminate Flooring

Properly addressing buckled laminate flooring involves identifying the cause, implementing minor repairs, replacing damaged boards, assessing subfloor issues, and recognizing when professional help is needed. 

A. Identifying the cause of the buckling

The initial step in addressing buckled laminate flooring is to identify the cause. This could be due to prolonged exposure to moisture, improper installation, or extreme temperature changes. 

Understanding the underlying cause not only helps in effective repair but also aids in preventing future occurrences.

B. Steps to repair minor buckling issues

First, remove the moldings around the area for minor buckling, then disassemble the flooring up to the affected plank. 

Replace the buckled plank and put the disassembled planks back. Finish by replacing the molding. 

Always maintain a 1/4-inch gap from the wall to allow for the natural expansion of the laminate.

C. When and how to replace damaged boards

Severe buckling often requires the replacement of damaged boards. To replace a board, remove the surrounding boards carefully, replace the damaged one with a new one, and then reassemble the flooring. 

It’s advisable to keep a few extra boards during the initial installation for such replacements.

D. Addressing subfloor problems

Subfloor issues like uneven surfaces or excessive moisture can cause laminate buckling. To fix these issues, the subfloor needs to be made even, and any sources of excessive moisture must be addressed. This could involve using a leveling compound or installing a vapor barrier.

E. The importance of professional help

While homeowners can address minor issues, extensive damages often need professional intervention. 

Professionals have the tools and experience to identify problems accurately, suggest effective solutions, and ensure the job is done correctly. 

Hiring a professional can help save time, avoid further damage, and ensure the longevity of your laminate flooring.

Preventing Laminate Floor Buckling

Preventing buckling should be a priority to maintain the integrity and aesthetic of your laminate flooring. Here are some strategies to avoid this common problem:

Maintaining a Stable Indoor Environment

  1. Managing Humidity Levels: Keep indoor humidity levels between 35% and 65% to prevent the expansion and contraction that leads to buckling. To maintain these levels, use dehumidifiers in damp weather and humidifiers in dry conditions.
  2. Avoiding Extreme Temperature Changes: Dramatic temperature changes can cause your laminate flooring to expand and contract, leading to buckling. Maintain a consistent room temperature as much as possible.

Proper Installation Techniques

  1. Ensuring Expansion Gaps: Leaving an expansion gap of at least 1/4 inch around the room’s perimeter allows the flooring to expand without buckling.
  2. Choosing the Right Underlayment: The correct underlayment can help with moisture barrier and noise reduction. It can also provide a smooth surface for laminate installation, reducing the chances of buckling.

Regular Maintenance Practices

  1. Cleaning Up Spills Promptly: Any standing water can seep into the seams of the laminate flooring, leading to damage and buckling. Clean up any spills immediately to prevent this.
  2. Protecting Against Heavy Furniture: Use pads under heavy furniture to distribute the weight evenly and avoid pressure points that might cause buckling.

Quality Laminate Selection

  1. Tips for Selecting High-Quality Laminate: Look for laminate flooring with a thicker surface layer, as it tends to be more resilient. Additionally, check for warranties that cover buckling and other damage.
  2. Recognizing Reputable Brands: Purchase from reputable flooring brands. They are more likely to offer high-quality, durable products that resist buckling.


In conclusion, several factors contribute to laminate floor buckling, including improper humidity and temperature, poor installation techniques, lack of regular maintenance, and choosing inferior laminate flooring. 

By understanding these potential pitfalls, you can proactively safeguard your flooring investment. 

Prevention is indeed better than cure. Adopting preventive measures such as maintaining appropriate humidity levels, avoiding extreme temperature changes, ensuring proper installation techniques, carrying out regular maintenance practices, and selecting high-quality laminate can significantly minimize the risk of laminate floor buckling. 

It will help protect your laminate flooring and maintain its beauty for many years.

Finally, it’s essential to address any buckling issues promptly. The faster you act, the more likely your flooring can be restored without needing replacement. 

This prompt action saves you time and money and extends the life of your laminate flooring. 

Ignoring a buckling problem can lead to more severe damage and ultimately shorten the lifespan of your flooring. 

Therefore, act swiftly and responsibly to ensure the longevity of your laminate flooring.


Hi! I’m Kobby, one of the co-owners of favoredstoneguides.com and the newest house owner in town. I’m a huge fan of most things natural. Over here on this site, I'm happy to share all the exciting hacks, tricks, and tips I have learned and continue to learn each day about taking care of natural stones.

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