LVP vs. Hardwood Near Lake Lanier: 7 Things Humidity Does to Each
By Christos Metallinos, owner of Glaze Flooring & Tile
If you live near Lake Lanier, you already know the air gets heavy in summer. The numbers bear it out. Weather records for Gainesville's Lee Gilmer Memorial Airport (1992–2021, via timeanddate.com) show average relative humidity around 66% for the year, rising to roughly 69–71% from June through August, with average summer dew points near 68°F. Winter heating then dries indoor air out.
Those swings matter far more to some floors than others. Here is what humidity actually does to LVP and to hardwood, and what you can do about it.
1. Hardwood moves with the air. LVP mostly doesn't.
Wood absorbs and releases moisture from the air around it, swelling when it's humid and shrinking when it's dry. The National Wood Flooring Association (NWFA) says that, with geographic exceptions, wood floors do best when the home is held between 30% and 50% relative humidity and 60–80°F. Outdoor summer air here runs well above that range, so your HVAC system does the real work.
LVP is made mostly of vinyl or a stone-polymer core, so it doesn't swell from humidity the way wood does. It does expand and contract with temperature, which is why it needs an expansion gap at the walls (more on that below).
2. Summer humidity causes cupping. Winter dryness causes gaps.
When hardwood takes on moisture from below or from the air, board edges rise above the centers. That's called cupping. In a dry heating season the same boards shrink, and you see thin gaps between them. Some seasonal gapping is normal. Severe cupping usually points to a moisture source: a damp crawlspace, a slab without a vapor barrier, or an HVAC system that isn't running.
3. "Waterproof" LVP still cares about what's underneath it.
Glaze's own LVP page describes the product as having a waterproof wear layer, and that's true of the plank. But the planks sit on a subfloor. If a crawlspace or slab is wet, moisture can get trapped under the floor and cause mold or odor problems even though the vinyl itself is fine.
That's why manufacturers set subfloor rules. Provenza's MaxCore LVP guidelines, for example, call for crawlspaces at least 18 inches high with a 6-mil ground-cover vapor barrier, and for a 6-mil poly moisture barrier between concrete and the ground under slabs. Glaze's site lists "moisture-test and level the subfloor" as the first step of its LVP process.
4. Lake houses with the AC off are a special case.
Many lake homes sit closed up for weeks. That's hard on hardwood, which can cup during a humid stretch with no air conditioning. But it isn't automatically fine for LVP either. The same Provenza guideline asks for HVAC keeping the room at 65–85°F and 35–55% humidity "before the flooring is delivered or installed, and throughout the lifetime of the flooring installation." Read your product's warranty. Some exclude damage from unconditioned spaces.
If you plan to leave a lake home unconditioned, ask your installer which products allow that, and get the answer in writing.
5. Both floors need acclimation, but for different reasons.
Hardwood is acclimated so the wood's moisture content gets close to what it will be in your home. NWFA guidance calls for checking moisture in both the flooring and the subfloor, and keeping the difference within limits that depend on board width. LVP is acclimated mainly for temperature. Provenza, for instance, requires at least 72 hours with cartons in the installation room.
Glaze's hardwood page says this directly: "Around Lake Lanier, humidity swings matter. We take moisture readings on the slab or crawlspace and acclimate material on site before install."
6. Engineered hardwood is a middle path.
Engineered hardwood has a real wood top layer bonded to a cross-layered core. NWFA's guidelines note that engineered construction is more dimensionally stable than solid wood. If you want real wood in a basement-level room or over a slab near the lake, engineered is usually the first thing an installer will suggest. Glaze installs both solid and engineered hardwood, per its services page.
7. Sun and heat matter more to LVP than humidity does.
Lake-facing rooms often have big windows. Vinyl expands in heat, and manufacturers specify perimeter expansion gaps (Provenza calls for 3/8 inch, increased to 1/2 inch for rooms longer than 50 feet). Floors pinned under heavy built-ins or trimmed too tight can buckle on a hot afternoon. Blinds or UV-filtering window film help both floors. Hardwood fades in sun, and LVP can move.
So which one should you choose?
LVP tends to make sense in kitchens, basements, laundry rooms, rentals, homes with big dogs, and lake houses that see spills and wet feet. Glaze's FAQ calls it ideal for "kitchens, basements and busy homes."
Hardwood tends to make sense in main living areas of a home that's conditioned year-round, especially if resale matters. Glaze's FAQ describes it as "warmer underfoot, refinishable for decades and a stronger resale feature, but it doesn't like standing water."
Many homes near the lake end up with both: hardwood or engineered wood in the main living area, LVP or tile in wet areas and the basement.
Typical installed cost in this area: Glaze charges $2.29 to $2.99 per sq ft to install LVP and $3.99 to $5.99 per sq ft to install hardwood. Both are installation prices; materials are not included.
FAQ
Do I need a dehumidifier for hardwood near Lake Lanier? Not always. A properly sized, running HVAC system often keeps a home in range. A basement or crawlspace that stays damp may need a dehumidifier. An inexpensive hygrometer will tell you where your home actually sits.
Can LVP go directly on a basement slab? Usually yes, provided the slab passes the manufacturer's moisture test and any required vapor barrier is in place. Check the specific product's installation guide, since limits vary by brand.
Will hardwood near the lake void the warranty? Location alone usually doesn't. Failing to maintain the humidity and temperature range in the manufacturer's guidelines often does. Keep your HVAC records and a hygrometer log if you're worried.
Is laminate a good compromise? Laminate is more scratch-resistant than many floors and costs less, but most laminate has a wood-fiber core that is more sensitive to standing water than LVP. Glaze's laminate page suggests comparing samples next to LVP in your own light.