Why Hardwood Floors Gap in Summer and When You Need Hardwood Floor Repair
Hardwood floor repair is not the first step every time boards open up in August. In McKinney and Keller, the AC can dry indoor air so much that solid wood shrinks. Small gaps are often normal. Wide gaps, raised edges, or spaces that never close are not.
Most national guides say wood gaps in winter and closes in summer. That is true in many climates. North Texas is different. Outside it is hot and humid. Inside, the air conditioner runs for months. That indoor air can get dry. Dry air pulls moisture out of the wood. The planks get a little narrower. You see lines between boards.
This guide explains why that happens, when to leave the floor alone, and when to call a pro.
Why Does the AC Open Gaps in a Texas Summer?
Wood is a natural material. It takes on moisture. It lets moisture go. Indoor humidity is what the floor “feels,” not the weather app on your phone.
In a DFW summer:
- Outdoor air is often damp
- The AC cools the house and strips moisture from that air
- Solid hardwood can shrink a bit
- Tiny gaps show up, especially on wide planks and square edges
Engineered hardwood usually moves less. It still can show hairline lines if the house is very dry. A slab home with the AC set very cold can dry out faster than you think. Not every DFW home dries out in August. Some stay damp and cup instead of gap.
A small gap you can see but not drop a coin into is often seasonal. It is not proof the install failed.
Use the humidity range your flooring brand specifies, often around 35% to 55%. If your home sits well below that all summer, gaps are more likely. A cheap humidity gauge tells you more than guessing.
When Gaps Are Normal vs When You Need Hardwood Floor Repair
This is the question that saves people from a bad DIY fix.
Leave it alone (for now)
Seasonal gaps usually:
- Show up when the AC runs hard
- Stay fairly even across the room
- Stay narrow (about the thickness of a credit card or less)
- Close or shrink when humidity rises in fall
Do not fill those gaps with hard wood putty in August. When the boards swell later, the filler can crush the edges or pop out. That turns a normal cycle into real damage.
First fix: humidity. A whole-house humidifier on the HVAC, or a quality portable unit, can close small lines without touching the floor.
Call for hardwood flooring repair
Book a visit if you see:
- Gaps around 1/8 inch or wider that are uneven, sit in one area only, or stay open when humidity is back in range
- Cupping (edges higher than the center of the board)
- Crowning (center higher than the edges)
- Boards that rock, squeak in a new way, or feel loose
- Dark stains, buckling, or a musty smell (moisture from below, not dry AC air)
A gap near 1/8 inch is a warning to look closer, not a universal repair line. Wide boards can open that much in dry air and still close later. Those other signs can mean a slab moisture issue, a skipped acclimation, or damage that filler will not fix. Filling is not the same as repair.
How to Repair Hardwood Floors Without Making Summer Gaps Worse
Search “how to repair hardwood floors” and you will find kits, wax sticks, and rope filler. Some of those tools help a tiny scratch. They are the wrong tool for seasonal gapping.
Here is the order we use in North Texas.
1. Measure humidity, not just the gap
Check indoor relative humidity in the same rooms as the floor. Check it in the afternoon, when the AC has been running. If the air is very dry, fix that first and take photos. Compare the same spots in a few weeks.
2. Decide if it is movement or damage
Movement looks like even lines between boards. Damage looks like chips, broken tongues, stained edges, or a floor that no longer sits flat. Movement needs climate control. Damage needs a technician.
3. Repair only what will not fight the wood later
A pro may:
- Replace a few damaged boards
- Glue or reset a loose plank
- Address slab moisture before any cosmetic work
- Sand and refinish when the finish is worn, not when the only issue is a winter-style gap in August
Full refinishing is a different job. If the floor is dull, scratched deep, or you want a new color, see our guide on how to refinish hardwood floors. Do not refinish just to hide seasonal lines that will return next year.
4. Skip the “permanent” filler on a dry floor
If someone fills gaps at the driest moment of the year, the wood has nowhere to go when moisture returns. Edges crush. Filler fails. You pay twice.
What About Engineered Hardwood?
Engineered floors still need steady indoor air. They often gap less than solid oak or hickory on a slab. If an engineered floor shows large openings in one area only, that is more likely an install or moisture issue than “August weather.”
We install and service both. The right next step depends on the product in your house, not a generic internet chart.
Hardwood Floor Repair Near Me in McKinney and Keller
If you are searching hardwood floor repair near me, you want someone who understands DFW slabs and summer AC, not a winter-only advice page written for the Midwest.
Elegant Floors & Remodeling is a licensed local team. We work on solid and engineered hardwood. We do not outsource the install crew. You can see products in our McKinney showroom at 4900 Eldorado Pkwy or our Keller showroom at 2041 Rufe Snow Dr.
We offer free measurements and a clear opinion: leave it, humidify it, spot-repair it, or plan a larger floor project. Labor is backed by a 2-year warranty on the work we perform.
We also serve Allen, Plano, Richardson, Frisco, The Colony, Southlake, and North Richland Hills.
Frequently Asked Questions
Why do my hardwood floors gap in summer, not winter?
In many states, winter heat dries the air. In North Texas, summer AC often does that job. The wood still shrinks when it is dry inside. The season on the calendar is not the same as the climate in your living room.
Will the gaps go away on their own?
Small, even gaps often ease when indoor humidity rises. Wide or uneven gaps may not. Photos two months apart help. Guessing does not.
Should I use a humidifier in August?
If your indoor humidity is consistently low, yes. Keep it in the range your flooring brand specifies, often around 35% to 55%. Too much moisture can cup the boards. More is not always better.
Can you repair one room without doing the whole house?
Often yes, if the issue is a few boards or a clear moisture spot. If the whole floor has moved the same amount, climate control is usually the first move.
Is this covered by a wood warranty?
Many maker warranties exclude damage from indoor humidity that is too high or too low. That is another reason to measure before you file a claim or sand the floor.
Get an Honest Look at Those Summer Gaps
Hardwood floor repair should match the cause. If the AC dried the house, the first tool is humidity, not a tube of filler. If boards are damaged, loose, or the slab is wet, a local crew should see it in person.
Elegant Floors & Remodeling can check the floor, explain what is normal for Texas, and quote only the work you need.
McKinney: (469) 972-8806
Keller: (817) 993-4443
Schedule a free in-home estimate or stop by the showroom. Bring photos of the gaps if you like. We will tell you whether to wait, humidify, or repair.