Making your flooring dreams come true!

If you’ve lived through a Pennsylvania summer, you already know the feeling: step outside in July and the air practically sticks to you. That same humidity that makes summer afternoons feel heavy can also have a major impact inside your home especially on your hardwood floors.

At Nolt’s Floor Covering, we’ve spent more than 25 years helping homeowners and business owners throughout Lancaster County and Lebanon County protect and upgrade their flooring. One of the most common seasonal concerns we hear every summer is:

“Why do my hardwood floors suddenly look different?”

The short answer? Humidity.

Whether you own a historic farmhouse near Ephrata, a suburban home in Lancaster, or a Main Street commercial property in Myerstown, summer moisture can affect your flooring in ways you might not expect.

In this guide, we’ll explain how summer humidity affects hardwood floors, the warning signs to watch for, and how to protect your investment during humid Pennsylvania summers.

Why Humidity Impacts Hardwood Flooring

Wood Naturally Expands and Contracts

Hardwood flooring is a natural product, which means it constantly reacts to moisture in the air. Wood absorbs humidity when moisture levels rise and releases moisture when the air becomes dry.

That’s why hardwood floor expansion is so common during Pennsylvania summers.

Think of hardwood like a sponge not in appearance, but in behavior. Even professionally finished flooring still “breathes” with the seasons. During the winter, boards often shrink slightly. In the summer, they expand.

We’ve had customers call us in a panic after noticing their floors suddenly feel tighter or slightly uneven in July. In most cases, it’s simply seasonal movement caused by humidity.

The key is understanding what’s normal and what’s a sign of damage.

How Pennsylvania Summers Create Flooring Problems

Pennsylvania humidity and hardwood floors are a challenging combination because our region experiences dramatic seasonal swings.

Lancaster and Lebanon County summers often bring:

• High outdoor humidity
• Frequent thunderstorms
• Moisture-heavy basements and crawl spaces
• Temperature fluctuations
• Increased indoor condensation

Homes without proper climate control are especially vulnerable.

Commercial spaces can experience similar issues too. Restaurants, retail storefronts, and office buildings with constantly opening doors often struggle to maintain stable humidity levels, which puts additional stress on hardwood flooring.

This is one reason hardwood flooring maintenance matters so much in our area.

Common Signs of Humidity Damage in Hardwood Floors

If you’re wondering, “Can humidity damage hardwood floors?” the answer is yes.

Here are the most common hardwood floor humidity problems we see every summer.

Cupping

Cupping happens when the edges of hardwood planks rise higher than the center, creating a slight “wave” shape.

This typically occurs when moisture builds underneath the flooring or humidity levels become too high inside the home.

You may notice:

• Boards feel uneven under bare feet
• Light reflects differently across the floor
• Edges appear raised

We often see cupping in older homes around Lancaster County where basements have poor moisture control.

Buckling

Buckling is more severe than cupping and occurs when flooring lifts completely away from the subfloor.

This usually means excessive moisture exposure.

Common causes include:

• Flooding
• Long-term humidity buildup
• Plumbing leaks
• Poor installation practices

Buckling should be addressed quickly because it can lead to permanent damage.

Gapping

Homeowners often ask, “Does humidity cause hardwood floor gaps?”

Ironically, gaps are usually more noticeable during dry winter months, but improper seasonal expansion can also create irregular spacing issues year-round.

If flooring wasn’t installed with proper expansion allowances, summer swelling can force boards against each other and create stress throughout the floor system.

Squeaking Floors

Humidity can also cause squeaks and movement.

As boards expand and contract, nails and fasteners loosen slightly over time. That movement creates the familiar creaking sounds many homeowners notice during seasonal transitions.

Older homes throughout Ephrata and Lancaster are especially prone to this issue.

Which Hardwood Floors Handle Humidity Best

If you’re considering new flooring for your Pennsylvania home, choosing the right product can make a huge difference. Not all hardwood flooring reacts the same way to moisture.

Engineered Hardwood vs Solid Hardwood

The debate between engineered hardwood vs solid hardwood has become increasingly important in humid climates.

Solid hardwood is made from one solid piece of wood. While beautiful and long-lasting, it’s more sensitive to moisture changes.

Engineered hardwood uses multiple layered materials beneath a real hardwood surface. This layered construction helps reduce movement caused by humidity.

Benefits of engineered hardwood include:

• Better dimensional stability
• Reduced expansion and contraction
• Improved moisture resistance
• Easier installation in basements or concrete slab homes

Many homeowners in Lancaster PA hardwood flooring projects are now choosing engineered products for this exact reason.

Best Wood Species for Humid Climates

Some wood species naturally perform better in humid environments.

Popular options include:

• White Oak
• Hickory
• Maple
• Engineered European Oak

These species tend to be more stable and durable during seasonal humidity changes.

If you’re searching for the best hardwood flooring for humid climates, product construction matters just as much as wood species.

Why Matte Finishes Are Trending

Matte and low-sheen finishes continue to grow in popularity across Pennsylvania homes and commercial spaces.

Why?

Because they:

• Hide small imperfections better
• Reduce the appearance of scratches
• Minimize visible seasonal movement
• Create a modern, natural look

Many homeowners also love how matte finishes pair with today’s open-concept kitchens and rustic-modern interiors.

How to Protect Hardwood Floors During Summer

The good news is that most humidity-related flooring problems are preventable.

Here’s how to protect hardwood floors from humidity during Pennsylvania summers.

Maintain Indoor Humidity Levels

The ideal indoor humidity level for hardwood flooring is typically between 35% and 55%.

A simple hygrometer can help monitor indoor conditions.

If humidity consistently climbs above that range, your floors become more vulnerable to expansion and moisture damage.

Use Air Conditioning and Dehumidifiers

Air conditioning does more than cool your home it removes moisture from the air.

Dehumidifiers are especially important for:

• Basements
• Older homes
• Crawl spaces
• Commercial buildings

One customer in Lebanon County told us they thought their flooring was failing, but the real issue was a damp unfinished basement causing moisture buildup underneath the floor.

After adding a dehumidifier, the problem stabilized significantly.

Proper Cleaning Methods

Summer cleaning habits matter more than many people realize.

Avoid:

• Excess water when mopping
• Steam cleaners
• Harsh chemical cleaners

Instead:

• Use microfiber dust mops
• Clean spills immediately
• Use manufacturer-approved hardwood cleaners

Too much water during cleaning can worsen hardwood floor humidity problems.

Seasonal Maintenance Tips

A few small maintenance habits can make a big difference:

• Use entry mats during rainy weather
• Trim pet nails to prevent scratches
• Inspect around windows and doors for leaks
• Keep furniture pads under heavy items
• Schedule periodic professional inspections

Routine hardwood flooring maintenance extends the life of your floors and helps prevent costly repairs.

Why Many Pennsylvania Homeowners

Are Switching to Engineered Hardwood

We’ve seen a noticeable shift over the past several years toward engineered hardwood flooring for Pennsylvania homes.

Improved Moisture Resistance

Today’s engineered hardwood products are designed specifically to handle changing indoor conditions more effectively.

That added stability makes them ideal for:

• Busy family homes
• Open-concept layouts
• Finished basements
• Commercial spaces

Better Stability for Seasonal Changes

Pennsylvania weather changes dramatically throughout the year.

Engineered hardwood adapts better to:

• Humid summers
• Dry winters
• Temperature fluctuations
• Indoor climate inconsistencies

For many homeowners, the reduced seasonal movement alone makes engineered hardwood worth considering.

Professional Hardwood Flooring Installation Matters

Even the best flooring products can fail if installed improperly.

That’s why professional installation is critical.

Proper Acclimation Before Installation

Before installation, hardwood flooring should acclimate to the indoor environment for several days.

Skipping this step is one of the biggest causes of future hardwood floor expansion issues.

At Nolt’s Floor Covering, we carefully monitor moisture levels before installation to help ensure long-term performance.

Subfloor Moisture Testing

Subfloors play a huge role in flooring stability.

Professional installers should always:

• Test subfloor moisture levels
• Check crawl spaces and basements
• Verify humidity conditions
• Allow proper expansion gaps

Unfortunately, we’ve repaired many floors installed by contractors who skipped these steps entirely.

Proper installation helps protect your investment for decades.

Trust Nolt’s Floor Covering for Hardwood Flooring in Lancaster & Lebanon County

For more than 25 years, Nolt’s Floor Covering has helped homeowners and businesses throughout Ephrata, Myerstown, Lancaster County, and Lebanon County choose flooring that stands up to Pennsylvania’s changing seasons.

Whether you’re replacing damaged floors, upgrading your home, or planning a large commercial renovation, our experienced team can help you find the right solution for your space and lifestyle.

From engineered hardwood to waterproof flooring options, we’re here to help you make informed decisions with honest guidance and professional installation.

Schedule a Free Hardwood Flooring Consultation

If your floors are showing signs of summer humidity damage or you’re planning a new flooring project, contact Nolt’s Floor Covering today.

We’re your trusted local flooring experts, dedicated to:

“Making your flooring dreams come true!”