Laminate is a layered material, and like most flooring products it responds to changes in temperature and humidity by expanding slightly when conditions get warmer and more humid, then contracting again as things cool and dry out. A stable indoor environment barely stresses the material at all. The habit of shutting off the AC while everyone is at work, then cranking it back on in the evening, creates a daily swing that many homeowners never connect to the small gaps or slight lifting they start noticing at the edges of their planks.
Why The Daily Swing Matters More Than People Expect
A single hot day does not damage a laminate floor. What causes wear over time is the repetition of expansion and contraction happening on a near daily basis throughout an entire Utah summer. Each cycle is small on its own, but the cumulative effect can show up as gapping between planks, slight lifting near walls, or a floor that feels less snug underfoot than it did when it was installed.
This is especially noticeable in homes where the AC gets shut off completely for eight or more hours a day rather than simply raised a few degrees. The bigger the swing between the daytime high and the evening cool down, the more the flooring material is working to expand and contract in response, and that repeated movement adds up differently than a stable, moderate temperature would.
A Smaller Setback Protects Your Floors Without Losing The Savings
You do not have to run your AC at full strength all day to protect your flooring. Raising the thermostat by a more moderate amount while you are away, rather than shutting the system off entirely, keeps the swing in temperature and humidity much smaller while still saving on cooling costs. Many programmable and smart thermostats are built specifically around this kind of moderate setback rather than a full shutoff, which tells you something about what actually works well for a home's materials, floors included.
This is a genuinely easy adjustment for most households, since it usually just means changing a thermostat schedule rather than any kind of renovation or repair. If your laminate floor has already developed some gapping from years of a full shutoff habit, a more moderate setback going forward can help slow further movement even if it does not reverse damage that has already occurred.
Expansion Gaps Exist For Exactly This Reason
Laminate installation always includes a small expansion gap along the perimeter of the room, tucked under the baseboard or a transition strip, specifically to give the flooring room to move with normal temperature and humidity changes. A properly installed floor with the correct gap can handle typical seasonal shifts without any visible problem at all.
Where trouble tends to show up is in homes with an undersized expansion gap, often from an installation that was done without accounting for how much the home's temperature actually swings day to day. If your laminate is gapping or lifting and your AC habits have not changed recently, it is worth having someone check whether the original installation left enough room for the floor to move the way it is designed to.
A Whole Home Humidity Monitor Takes The Guesswork Out
Most homeowners have a general sense of their thermostat setting but very little visibility into actual humidity swings happening throughout the day. A simple indoor humidity monitor, sold at most hardware stores, gives you a real read on how much your home's humidity is actually swinging rather than relying on a guess.
Keep indoor humidity in a moderate, stable range rather than letting it swing widely day to day
Use a moderate thermostat setback instead of a full shutoff during peak heat hours
Check that expansion gaps around your laminate are intact and not blocked by furniture or trim
If your laminate floor has started gapping or feels different than it did when it was installed, a quick look at your daily AC pattern is often more revealing than people expect. Our team can also take a look at your expansion gaps and installation if you want a second opinion. Contact us to talk through what you are seeing.
R-n-R Flooring and Design installs laminate with proper expansion clearance built in from the start, and our team throughout Weber, Davis, Morgan, and Salt Lake, UT and Southern Idaho, ID and Southwestern Wyoming, WY is happy to help you figure out whether what you are seeing is normal seasonal movement or something worth a closer look. Stop by our showroom at Ogden, UT to talk through it.
