Hardwood flooring, a significant investment for any homeowner, demands proper installation to ensure longevity and aesthetic appeal. One key entity, the National Wood Flooring Association (NWFA), establishes rigorous standards for hardwood installation; any deviation from these guidelines can indicate substandard work. Understanding the humidity levels within your home, a critical factor influencing wood expansion and contraction, is vital for preventing damage. The prevalence of cupping and crowning, telltale indications of moisture issues, often stems directly from inadequate subfloor preparation. Recognizing these distinct signs of bad hardwood installation, along with the potential need for expert consultation from a qualified flooring contractor, is essential for protecting your investment and avoiding costly repairs.

Image taken from the YouTube channel Gaylord Hardwood Flooring , from the video titled What not to do when installing hardwood flooring .
Is Your Floor Ruined? Spotting the Signs of a Botched Hardwood Installation
Hardwood flooring: a timeless choice. It brings warmth, elegance, and enduring value to any home. But this prized investment hinges on one crucial factor – proper installation. A flawlessly installed hardwood floor can last for generations, becoming a cherished feature of your home.
Conversely, a poorly executed installation can quickly turn your dream floor into a costly nightmare. It is a frustrating reality that many homeowners face.
Think of it: buckling boards, unsightly gaps, and irritating squeaks. These are just a few telltale signs that something went terribly wrong during the installation process. Beyond the aesthetic annoyances, a flawed installation can compromise the structural integrity of your floor. It can lead to expensive repairs down the road.
So, how can you tell if your beautiful new hardwood floor is actually a disaster waiting to happen?
This article will serve as your guide. We will explore the common, yet often subtle, indicators of subpar hardwood installation. From the unseen issues lurking beneath the surface to the glaring imperfections you can’t ignore. This guide will empower you to identify potential problems early on.
Recognizing the Red Flags: What to Look For
We will delve into the critical role of the subfloor, moisture control, and the often-overlooked process of acclimation. We will also examine the significance of expansion gaps and the telltale sounds of a poorly installed floor.
By understanding these key indicators, you’ll be equipped to assess the quality of your hardwood installation. More importantly, you will be empowered to take appropriate action.
Whether it’s addressing minor issues before they escalate or seeking professional help to rectify significant problems. Protecting your investment starts with knowledge and vigilance.
Foundation First: The Subfloor’s Unseen Influence
While the beauty of a hardwood floor lies in its visible surface, its success is deeply rooted in what lies beneath: the subfloor. Often overlooked, the subfloor is the unsung hero of any successful hardwood installation. It provides the crucial foundation upon which your investment rests. A stable, level, and properly prepared subfloor is not merely a suggestion; it is an absolute necessity. Failing to address subfloor issues before installation is akin to building a house on sand, ultimately leading to instability and a host of problems down the line.
The Subfloor’s Critical Role
The subfloor acts as the structural base for your hardwood flooring. It provides a flat, solid surface to which the hardwood is attached. This ensures the hardwood remains level, stable, and free from movement. A properly prepared subfloor will evenly distribute weight across the flooring, preventing stress points and minimizing the risk of future damage.
Problems Arising from an Inadequate Subfloor
An inadequate subfloor can manifest in various ways, each with its own set of detrimental effects on the finished hardwood floor.
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Unevenness: This is one of the most common and visually apparent problems. If the subfloor is not level, the hardwood flooring will mirror these imperfections. This results in an uneven surface that is both unsightly and uncomfortable to walk on.
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Instability: A weak or unstable subfloor will flex and move underfoot, causing the hardwood flooring to do the same. This movement can lead to squeaking, nail pops, and even separation of the planks over time.
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Moisture Issues: Subfloors that are not properly sealed or protected from moisture can transmit dampness to the hardwood flooring. This is a precursor to warping, cupping, and the growth of mold and mildew.
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Inadequate Fastening: A deteriorated subfloor might not properly hold fasteners, leading to loose boards and an unstable floor.
Connecting Subfloor Issues to Installation Failures
The consequences of ignoring subfloor inadequacies extend far beyond mere aesthetic flaws. Over time, these issues can lead to significant structural damage. The constant stress and movement caused by an unstable subfloor can weaken the hardwood flooring itself. This leads to cracking, splitting, and ultimately, the need for costly repairs or even complete replacement.
Furthermore, moisture issues originating from the subfloor can compromise the integrity of the hardwood. This promotes rot and decay, creating an unhealthy living environment. Ignoring the subfloor is not just a cosmetic oversight. It’s a gamble that can jeopardize the entire flooring investment and potentially your home’s structural health.
The Enemy Within: Moisture’s Destructive Force on Hardwood
Beyond the structural integrity provided by the subfloor, hardwood flooring faces another significant threat: moisture. Moisture is the single greatest enemy of hardwood, capable of inflicting a wide range of damage that can compromise both its aesthetic appeal and its structural integrity. From subtle discoloration to dramatic warping, the consequences of excessive moisture exposure can be devastating.
The Pernicious Effects of Excessive Moisture
Hardwood is a hygroscopic material, meaning it readily absorbs and releases moisture from its surrounding environment. This natural characteristic, while not inherently problematic, becomes a major concern when moisture levels are not properly managed. Excessive moisture absorption leads to expansion, while excessive dryness leads to contraction. When these fluctuations occur unevenly or excessively, problems inevitably arise.
Visible Signs of Moisture Damage
Recognizing the telltale signs of moisture damage is crucial for early detection and intervention. The longer moisture problems persist, the more extensive—and expensive—the repairs will be.
Cupping
Cupping is a common manifestation of moisture imbalance, where the edges of the hardwood planks rise higher than their centers, creating a concave or "cupped" appearance. This occurs when the bottom of the planks absorbs more moisture than the top, causing them to expand more on the underside.
Crowning
Conversely, crowning presents as the opposite of cupping. The center of the plank is higher than the edges, creating a convex or "crowned" appearance. This often happens after cupping has occurred and the moisture source has been removed. The edges dry out and shrink, while the center remains swollen.
Buckling
Buckling is perhaps the most dramatic and severe sign of moisture damage. It occurs when the hardwood planks lift completely off the subfloor, creating waves or humps across the floor surface. This indicates extreme expansion due to excessive moisture absorption, often resulting from flooding or leaks.
Staining and Mold Growth
Beyond warping, moisture can also lead to staining and the growth of mold or mildew. Water stains may appear as dark spots or discoloration on the surface of the wood. Mold and mildew thrive in damp environments and can cause further damage to the wood, as well as posing health risks to the occupants of the home. It’s crucial to address these issues promptly to prevent further spread and potential health complications.
Minimizing Moisture Exposure: A Proactive Approach
While completely eliminating moisture is impossible, taking proactive measures to minimize exposure is essential for preserving the longevity and beauty of your hardwood floors. These measures include:
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Ensuring proper ventilation in areas prone to moisture, such as bathrooms and kitchens.
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Promptly addressing any leaks or spills.
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Using dehumidifiers in damp basements or crawl spaces.
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Maintaining consistent humidity levels within the home.
By understanding the detrimental effects of moisture and implementing preventative strategies, homeowners can safeguard their hardwood flooring investment and enjoy its beauty for years to come.
Visible Flaws: Gaps, Unevenness, and Surface Imperfections
Beyond the unseen battles waged by moisture and improper subfloors, a poorly installed hardwood floor often betrays itself through readily observable flaws. These visible imperfections, ranging from unsightly gaps between planks to frustrating unevenness underfoot, not only detract from the floor’s aesthetic appeal, but also compromise its functionality and longevity.
The Anatomy of Gaps
Gaps in a hardwood floor are more than just cosmetic blemishes; they are often symptomatic of underlying installation errors or environmental control deficiencies. The appearance of gaps can vary, from hairline cracks to noticeable separations that can trap dirt and debris.
Causes of Gaps
Several factors contribute to the formation of gaps. Chief among them is improper acclimation. As previously discussed, hardwood needs to adjust to the ambient temperature and humidity of its installation environment before it is laid. Failure to do so results in the wood shrinking after installation, leading to gaps.
Substandard installation practices also play a significant role. If planks are not tightly fitted together during installation, even slight shrinkage can result in visible gaps. Furthermore, using inadequate fasteners or failing to properly secure the flooring can allow planks to shift and separate over time.
Finally, seasonal changes in humidity can exacerbate existing gaps or create new ones. During dry winter months, hardwood tends to lose moisture and shrink, widening any existing gaps. Conversely, during humid summer months, the wood expands, potentially closing or minimizing these gaps, only for them to reappear when the humidity decreases.
The Uneven Terrain: Lippage and General Unevenness
An even, consistent surface is a hallmark of a well-installed hardwood floor. Unevenness, on the other hand, is a sign of trouble.
Lippage: The Tell-Tale Sign
Lippage refers to height differences between adjacent planks, where one plank sits slightly higher or lower than its neighbor. This not only creates an uneven surface that is uncomfortable to walk on, but also poses a tripping hazard.
Lippage is commonly caused by inconsistencies in the subfloor. If the subfloor is not perfectly level, the hardwood planks will mirror these imperfections, resulting in lippage. Poor installation techniques, such as using inconsistent amounts of adhesive or failing to properly seat the planks, can also contribute to this problem.
General Unevenness: A Wavy Landscape
Beyond lippage, a floor may exhibit general unevenness across its entire surface. This can manifest as a wavy or undulating texture that is noticeable both visually and tactilely.
Such unevenness is almost always a direct consequence of an improperly prepared subfloor. If the subfloor has dips, humps, or other irregularities, these will translate directly to the finished hardwood floor. Additionally, using the wrong type of underlayment or failing to properly secure it can also contribute to overall unevenness.
The impact of these imperfections extends beyond aesthetics. Uneven surfaces can accelerate wear and tear on the flooring, making the hardwood more prone to scratches, dents, and other damage. Furthermore, they can create an uncomfortable and potentially unsafe walking surface. Addressing these visible flaws promptly is crucial for preserving the beauty and integrity of your hardwood floor.
Visible imperfections are undeniably frustrating, but the problems with a shoddy hardwood installation aren’t always visible. Sometimes, your ears will tell you everything you need to know.
The Soundtrack of Bad Install: Squeaks and Nail Pops
A beautiful hardwood floor should be a joy to walk upon, providing a solid, quiet surface underfoot. But when that surface starts talking back – with squeaks, creaks, and the occasional "pop" – it’s a clear indication of trouble lurking beneath. These audible cues aren’t just annoying; they’re often symptoms of deeper installation flaws or underlying structural problems demanding attention.
The Case of the Squeaky Floor
Squeaking floors are a common complaint, and while they might seem minor, they signal a more significant issue. The squeak itself is the sound of friction – wood rubbing against wood, or wood rubbing against a nail or screw.
More specifically, here are common causes of squeaky floors:
- Improper Nailing: The planks might not be securely fastened to the subfloor.
- Subfloor Issues: An uneven or inadequately secured subfloor allows the hardwood to move and rub. This is especially problematic if the subfloor wasn’t properly leveled before installation.
- Loose Tongue-and-Groove Joints: If the tongue-and-groove joints between planks aren’t tight, they can rub together and create noise.
- Environmental Factors: Changes in humidity can cause wood to expand and contract, leading to movement and squeaks, especially if the wood wasn’t properly acclimated.
Basically, squeaks mean something is moving when it shouldn’t be. Ignoring these sounds can lead to more significant problems down the line, including loosened planks, damaged fasteners, and even structural instability.
Nail Pops: A Surface Blemish with a Deeper Meaning
Nail pops are another common audible and visible sign of poor hardwood installation. They occur when the nails used to secure the hardwood floor begin to lift out of the wood, creating small bumps on the surface. These are more than cosmetic issues that diminish the beauty of the floor; they’re indicators of underlying problems.
The primary reasons for nail pops are:
- Incorrect Nailing Techniques: Using the wrong type of nails, or failing to drive them in at the correct angle and depth, can lead to them working their way loose over time.
- Subfloor Movement: If the subfloor is unstable or experiences excessive movement, it can push the nails upwards.
- Moisture Fluctuations: As wood expands and contracts due to moisture changes, it can exert pressure on the nails, causing them to pop.
Nail pops are not just unsightly. They can also pose a tripping hazard and damage the surrounding wood. Moreover, they create entry points for dirt and moisture, potentially leading to further problems.
In conclusion, don’t dismiss those squeaks and pops! They may seem like minor annoyances, but they are often early warning signs of more significant installation issues. Investigating and addressing these problems promptly can save you from costly repairs and ensure the longevity and beauty of your hardwood floor.
Squeaks and pops are certainly unwelcome additions to your home’s soundscape, serving as acoustic red flags signaling potential installation woes beneath the surface. But before you start diagnosing the noises emanating from your floor, let’s delve into another crucial aspect often overlooked: the all-important acclimation process.
Acclimation: Letting Your Wood Breathe Before Installation
Before a single nail is hammered or a drop of adhesive applied, hardwood flooring requires a period of acclimation – a crucial stage where the wood adjusts to the environment it will inhabit for years to come. Understanding and executing this step correctly is paramount to the long-term stability and appearance of your investment.
What is Acclimation?
Acclimation is the process of allowing hardwood flooring to adjust to the temperature and humidity levels of the room where it will be installed. Wood is a hygroscopic material, meaning it readily absorbs and releases moisture from the surrounding air. This exchange causes the wood to expand and contract.
The goal of acclimation is to bring the moisture content of the wood as close as possible to the average moisture content it will experience in your home. This minimizes dimensional changes after installation, preventing many common problems.
The Perils of Rushing Acclimation
Skipping or shortchanging the acclimation period is a recipe for disaster. Installing wood that hasn’t properly adjusted to its environment is essentially setting a time bomb. The consequences can manifest in various frustrating and costly ways:
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Gaps: As the wood dries out after installation, it shrinks, leaving unsightly gaps between planks.
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Cupping: The edges of the planks rise higher than the center, creating a concave, "cupped" appearance.
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Crowning: The opposite of cupping; the center of the plank is higher than the edges, forming a convex shape.
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Buckling: In extreme cases, the wood may expand so much that it buckles upwards, creating a tripping hazard and significant damage.
These problems are not merely cosmetic; they can compromise the structural integrity of your floor and require costly repairs or even complete replacement.
Signs of Improper Acclimation
How can you tell if your installer skipped or rushed the acclimation process? Here are some telltale signs to watch out for:
Immediately After Installation:
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Lack of Acclimation Period: Question the installer if they begin installing the flooring immediately upon delivery. A proper acclimation period can range from a few days to a week or more.
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Sealed Packaging: The wood should be removed from its packaging to allow for proper air circulation. If the installer leaves the wood bundled tightly in plastic, it won’t acclimate effectively.
Weeks or Months Later:
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Excessive Gapping: While some minimal gapping can occur with seasonal changes, large or rapidly developing gaps are a clear indication of improper acclimation.
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Cupping or Crowning: As mentioned earlier, these distortions are a direct result of moisture imbalances that could have been prevented with proper acclimation.
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Buckling: This is a severe symptom that often requires immediate attention to prevent further damage.
By recognizing these warning signs, homeowners can proactively address potential problems early on, safeguarding their investment and ensuring the long-term beauty and performance of their hardwood floors.
Squeaks and pops are certainly unwelcome additions to your home’s soundscape, serving as acoustic red flags signaling potential installation woes beneath the surface. But before you start diagnosing the noises emanating from your floor, let’s delve into another crucial aspect often overlooked: the all-important acclimation process.
Acclimation: Letting Your Wood Breathe Before Installation
Before a single nail is hammered or a drop of adhesive applied, hardwood flooring requires a period of acclimation – a crucial stage where the wood adjusts to the environment it will inhabit for years to come. Understanding and executing this step correctly is paramount to the long-term stability and appearance of your investment.
What is Acclimation?
Acclimation is the process of allowing hardwood flooring to adjust to the temperature and humidity levels of the room where it will be installed. Wood is a hygroscopic material, meaning it readily absorbs and releases moisture from the surrounding air. This exchange causes the wood to expand and contract.
The goal of acclimation is to bring the moisture content of the wood as close as possible to the average moisture content it will experience in your home. This minimizes dimensional changes after installation, preventing many common problems.
The Perils of Rushing Acclimation
Skipping or shortchanging the acclimation period is a recipe for disaster. Installing wood that hasn’t properly adjusted to its environment is essentially setting a time bomb. The consequences can manifest in various frustrating and costly ways:
Gaps: As the wood dries out after installation, it shrinks, leaving unsightly…
The Expansion Gap: A Safety Valve for Your Hardwood
Beyond acclimation, another critical factor in a successful hardwood floor installation is the often-unseen, yet vitally important, expansion gap.
This seemingly small detail plays a significant role in preventing major flooring problems down the line.
Understanding the Expansion Gap
The expansion gap is a small space left around the perimeter of the room, where the hardwood flooring meets the walls, cabinets, pipes, or other fixed structures.
Think of it as a safety valve, designed to accommodate the natural expansion and contraction of the wood due to changes in humidity and temperature.
Wood, as a natural material, is constantly reacting to its environment. It absorbs moisture from the air during humid periods, causing it to expand, and releases moisture during dry periods, causing it to contract.
Without an expansion gap, this natural movement can create immense pressure on the flooring system.
Why is the Expansion Gap Necessary?
The expansion gap provides the necessary space for the wood to move freely without being constrained. This is crucial for several reasons:
- Prevents Buckling: When wood expands and has nowhere to go, it can buckle upwards, creating an uneven and potentially dangerous surface. Buckling is a severe issue that often necessitates costly repairs or even full floor replacement.
- Avoids Cracking: Similarly, if the expansion is restricted, the wood can crack under the pressure. Cracks not only detract from the aesthetic appeal but also weaken the floor’s structural integrity.
- Protects Walls and Structures: Without an expansion gap, the expanding wood can exert force against the walls and other fixed structures. This can lead to damage to the drywall, trim, or even the foundation of the building in extreme cases.
Problems with Insufficient or Improperly Placed Expansion Gaps
When the expansion gap is either too small or completely absent, a host of problems can arise:
- Buckling: As mentioned earlier, this is one of the most common and visible consequences. The floor can heave upwards, particularly in areas with high humidity or temperature fluctuations.
- Cupping or Crowning: While often associated with moisture issues, insufficient expansion space can exacerbate these problems. Restricted expansion can lead to individual planks pushing against each other, causing them to cup (edges higher than the center) or crown (center higher than the edges).
- Squeaking: The pressure from restricted movement can also cause the floorboards to rub against each other or the subfloor, resulting in annoying squeaks.
Ensuring Adequate Expansion Space
The industry standard for the expansion gap is typically around ¼ to ½ inch, but it’s crucial to consult the manufacturer’s recommendations for your specific flooring product.
The size of the gap may vary depending on the width of the room, the type of wood, and the anticipated humidity levels.
Here are a few key things to keep in mind:
- Proper Installation: A qualified and experienced flooring installer will be well-versed in the importance of the expansion gap and ensure that it is correctly implemented.
- Avoid Obstructions: Make sure that the expansion gap is free from obstructions, such as debris or excessive adhesive.
- Consider Climate: In areas with significant humidity fluctuations, a slightly larger expansion gap may be necessary.
- Check After Installation: Periodically inspect the perimeter of the floor to ensure that the expansion gap remains adequate and unobstructed.
By understanding the vital role of the expansion gap, homeowners can take proactive steps to protect their hardwood flooring investment and ensure its long-term beauty and performance.
Squeaks and pops are certainly unwelcome additions to your home’s soundscape, serving as acoustic red flags signaling potential installation woes beneath the surface. But before you start diagnosing the noises emanating from your floor, let’s delve into another crucial aspect often overlooked: the all-important acclimation process.
Acclimation: Letting Your Wood Breathe Before Installation
Before a single nail is hammered or a drop of adhesive applied, hardwood flooring requires a period of acclimation – a crucial stage where the wood adjusts to the environment it will inhabit for years to come. Understanding and executing this step correctly is paramount to the long-term stability and appearance of your investment.
What is Acclimation?
Acclimation is the process of allowing hardwood flooring to adjust to the temperature and humidity levels of the room where it will be installed. Wood is a hygroscopic material, meaning it readily absorbs and releases moisture from the surrounding air. This exchange causes the wood to expand and contract.
The goal of acclimation is to bring the moisture content of the wood as close as possible to the average moisture content it will experience in your home. This minimizes dimensional changes after installation, preventing many common problems.
The Perils of Rushing Acclimation
Skipping or shortchanging the acclimation period is a recipe for disaster. Installing wood that hasn’t properly adjusted to its environment is essentially setting a time bomb. The consequences can manifest in various frustrating and costly ways:
Gaps: As the wood dries out after installation, it shrinks, leaving unsightly……
Calling in the Experts: When to Seek Professional Help
While diligent observation and a keen ear can help you identify potential problems with your hardwood floor, diagnosing the root cause and implementing effective solutions often requires the expertise of a seasoned professional. Hardwood flooring installation is a complex undertaking, and sometimes, even the most discerning homeowner needs a second opinion.
The Value of a Qualified Contractor
Selecting the right contractor for your hardwood flooring project is arguably one of the most crucial decisions you’ll make. A qualified and experienced contractor brings more to the table than just installation skills. They possess in-depth knowledge of wood species, subfloor preparation, moisture control, and industry best practices.
Proper installation is an investment, and choosing an amateur to save a few dollars upfront can lead to significant expenses and headaches down the road. Look for contractors with:
- Valid licenses and insurance.
- A proven track record of successful hardwood installations.
- Positive reviews and testimonials from previous clients.
- A clear and comprehensive contract outlining the scope of work, materials, and warranty.
When to Call for a Professional Inspection
Even if you believe you have identified the source of your flooring issues, a professional inspection is highly recommended. A trained eye can uncover hidden problems, assess the extent of the damage, and recommend the most appropriate course of action.
Here are some scenarios where a professional inspection is essential:
- Widespread Issues: If you’re noticing multiple problems, such as cupping, buckling, excessive gaps, or persistent squeaking, a professional assessment is crucial.
- Uncertainty: If you’re unsure about the cause of your flooring problems or how to address them effectively, seeking expert advice is always wise.
- Warranty Claims: If you suspect a defect in the flooring material or workmanship, a professional inspection can provide valuable documentation to support your warranty claim.
A professional inspection will typically involve:
- A thorough visual examination of the floor.
- Moisture testing of the wood and subfloor.
- An assessment of the subfloor’s levelness and stability.
- A written report outlining the findings and recommendations.
Understanding Your Warranty Coverage
Before taking any action to repair or replace your hardwood floor, it’s imperative to review your flooring warranty. Familiarize yourself with the terms and conditions, including what is covered, what is excluded, and the procedures for filing a claim.
Keep in mind that most warranties have specific requirements regarding installation, maintenance, and environmental conditions. Failure to comply with these requirements may void your warranty.
A professional flooring contractor can also assist you in understanding your warranty coverage and navigating the claims process. They can provide documentation and expert opinions to support your claim and ensure that you receive the compensation you are entitled to.
Frequently Asked Questions: Bad Hardwood Installation
If you’re concerned about the quality of your recent hardwood floor installation, these frequently asked questions can help you determine if you have a problem. We’ll cover common issues and help you understand if you’re seeing signs of bad hardwood installation.
What are some immediate red flags after a hardwood floor install?
Gaps between boards, uneven surfaces, and squeaking sounds are immediate signs of bad hardwood installation. Also look for visible damage like scratches, dents, or chipped edges, especially if the flooring was supposed to be new.
How can I tell if the installer acclimated the wood properly?
Improper acclimation leads to warping, cupping, or crowning later on. If your floorboards are buckling or lifting after installation, it’s a strong indicator the wood wasn’t properly acclimated to your home’s humidity before installation.
What constitutes an unacceptable amount of squeaking?
Occasional, minor squeaks are normal, especially with natural wood. However, widespread and loud squeaking across large areas indicates improper subfloor preparation or incorrect fastening techniques, both clear signs of bad hardwood installation.
What can I do if I suspect a bad hardwood installation?
Document everything with photos and videos. Review your contract with the installer, and communicate your concerns in writing. If the installer is unresponsive or unwilling to correct the issues, consider seeking a professional opinion from another flooring expert and exploring your legal options.
So, keep an eye out for those signs of bad hardwood installation! If anything seems off, don’t hesitate to get a second opinion from a pro. Hopefully, this helps you keep your floors looking beautiful for time to come!