The real difference is what the plank is made of. Rigid-core vinyl has a plastic core, so water that sits on it or seeps around it doesn't make the plank swell. Laminate has a core of wood fiber pressed into board, and "water-resistant" means its surface and joints keep water away from that core for a limited time. On the entry tier of Mohawk's RevWood laminate, that window is 30 minutes. If water does reach the core, the swelling stays after the floor dries.
At the top of the laminate range, the gap is small. Those laminates are sold as waterproof, with warranties that cover spills, pet accidents and even steam mopping, and full coverage depends on the edges of the floor being sealed when it's installed. And the fine print is the same on both sides: Mohawk's warranties for its waterproof laminate and its vinyl both exclude leaking appliances, floods and moisture coming up from under the floor. Those are the situations where vinyl and laminate still behave very differently, and they're what to plan around when you choose between them.
What's inside the plank: wood fiber vs. plastic
Laminate is a layered plank built on fiberboard. The North American Laminate Flooring Association (NALFA), whose LF-01 standard sets performance requirements for laminate flooring, defines the core as high- or medium-density fiberboard: cellulose fibers combined with synthetic resins under heat and pressure. A printed design layer sits on top of the core, covered by an overlay that provides the wear resistance, and a backing layer on the underside keeps the plank balanced.
Fiberboard is dense and stable when it's dry, but it's still wood fiber. The U.S. Forest Service's Wood Handbook explains that driving water-based liquids into fiber composites can cause swelling that permanently damages the bonds between the wood and its adhesive. On a floor, that shows up as raised, swollen plank edges, and drying the room out afterward doesn't undo it. Laminate's water protection works by keeping water out of the core in the first place; Mohawk describes its WetProtect laminates as having a waterproof surface and water-tight joints.
Rigid-core vinyl, labeled SPC or WPC depending on the core recipe, is layered too: a printed design under a clear wear layer, bonded to a stiff core. ASTM's specification for these floors describes them as resilient flooring with a polymeric rigid core, held together by a binder that is at least 60 percent vinyl chloride polymer by weight. There's no fiberboard in that core to swell, so manufacturers can warrant the plank itself as waterproof. Water can still travel through the seams and around the edges to whatever is underneath, and that's where the warranties get specific.
What "water-resistant" and "waterproof" mean on a laminate box
On laminate, those words usually name a warranty tier, and the tiers can be far apart within a single brand. Mohawk's RevWood laminate, one of the laminate lines in our catalog, shows how far. Its current wood products warranty brochure (January 2026) lists four tiers:
| RevWood tier | Wet warranty | Time limit on spills | Pet accidents | Mopping |
|---|---|---|---|---|
| Essentials | Wet Resistance (lifetime) | 30 minutes | Urine not covered | Damp mop only |
| Select | Waterproof (10 years) | None stated | Covered | Damp or wet, no steam |
| Plus and Premier | WetProtect (lifetime) | None stated | Covered | Damp, wet or steam |
Only the WetProtect tiers reach past the planks: Mohawk's warranty also covers damage to the subfloor, including mold, when spilled water leaks through a properly installed joint. Even on those tiers, Mohawk still asks that spills be wiped up promptly.
The waterproof tiers come with a condition that's easy to miss. Mohawk's installation instructions call for sealing the whole perimeter of the floor, either by filling the 3/8-inch expansion gap with foam backer rod and 100 percent silicone or by using its PerimeterSeal tape or waterproof quarter round. The warranty spells out why that matters: the Waterproof and WetProtect warranties don't apply to damage at an unsealed perimeter. If you're comparing installation quotes for a waterproof laminate, check that the sealing is in the quote.
Industry testing gives you a second way to judge a laminate. NALFA's LF-01 standard includes a thickness swell test in which a 6-inch square of laminate is submerged for 24 hours and its edges are measured. A residential laminate passes if it swells less than 18 percent. On a 12 mm plank, that still allows a little over 2 mm of swelling, so a laminate can meet the basic standard and still swell noticeably if water gets into its edges.
NALFA's Surface Swell test is much closer to what happens in a home. A 4-inch ring is sealed over a T-shaped joint where three pieces of plank lock together, filled with 100 milliliters of water (a little under half a cup) and left for 24 hours. The floor then dries for another day before the joint is measured again. To earn the certification, the swelling measured near the joint has to settle back to an average of 0.3 mm or less, with no more than slight visible swelling. The certification is optional, and a laminate has to pass LF-01 first, so it's worth asking whether the laminate you're considering carries it.
What "waterproof" means on a vinyl box
On rigid-core vinyl, "waterproof" is a promise about the plank. The warranty for Karastan's LuxeCraft vinyl (January 2025 edition), another line in our catalog, puts it this way: the floor is warranted as 100 percent waterproof, and its structural integrity won't be significantly diminished by exposure to water. The same document draws the limits. That promise covers the product itself, not the subfloor or the adhesives, and it covers topical water only: not water coming from underneath, and not flooding.
LuxeCraft collections also carry WetProtect coverage, which adds the subfloor directly under the planks when wet mopping or everyday spills get through properly installed joints. It comes with the same condition as the laminate version: the whole perimeter has to be sealed with the WetProtect molding system or 100 percent silicone over foam backer rod. Put the two warranty documents side by side and the top tiers of waterproof laminate and waterproof vinyl read almost alike.
How vinyl and laminate handle water, situation by situation
Where the water comes from, and how long it stays, decides how much the core matters. In the table below, "water-resistant laminate" means an entry tier like RevWood Essentials, "waterproof laminate" means a top tier like RevWood Plus or Premier with the perimeter sealed, and "waterproof vinyl" means a rigid-core plank like LuxeCraft or SolidTech.
| Situation | Waterproof vinyl | Water-resistant laminate | Waterproof laminate |
|---|---|---|---|
| Spill wiped up within minutes | No problem | No problem | No problem |
| Pet accident found after work | Plank unharmed | Past its 30-minute window | Covered |
| Mopping | Damp mop; don't flood it | Damp mop only | Damp, wet or steam |
| Burst supply line or leaking dishwasher | Not covered; planks survive, subfloor must dry | Not covered; planks that swell are replaced | Not covered; planks that swell are replaced |
| Moisture rising through a slab | Not covered; tolerates a damper slab | Not covered | Not covered |
| Humid air | Humidity limit applies around installation | Humidity range required for life | Humidity range required for life |
| Floodwater | Floating floors don't qualify as flood-resistant | Rated unacceptable by FEMA | Rated unacceptable by FEMA |
Leaks, floods and water from below: what the warranties exclude
Read the exclusions in both warranties and the same list appears. Mohawk's laminate brochure says the floor isn't designed to withstand flooding, plumbing accidents or leaking appliances such as icemakers, dishwashers and clothes washers. It also excludes moisture in or under the subfloor, and moisture that originates outside the room where the floor is installed. The LuxeCraft vinyl warranty rules out plumbing and appliance leaks, storms, floods and water rising from below the floor. On both floors, "waterproof" is a promise about water that lands on top.
When a lot of water does get underneath, the two floors part ways. Vinyl planks stay intact, but they sit over the subfloor like a lid, and the subfloor can't dry until they come up. Timing matters here: the EPA advises drying water-damaged materials within 24 to 48 hours, and says mold won't grow in most cases when they're dried in that window. FEMA makes the same point in its flood guidance, noting that vinyl over a plywood floor has to be removed so the plywood can dry.
Laminate planks whose cores took on water are a different story. Once the fiberboard has swollen, those planks get replaced. If you choose laminate, keep a spare carton from your installation. Mohawk recommends saving extra planks for repairs, and planks bought years later may not match: its warranty excludes color and gloss differences in material added to a floor at a later date.
Since appliance and plumbing leaks aren't covered by either floor's warranty, leak detection is worth considering whichever floor you choose. The Metropolitan Water District's SoCal Water$mart program offers a $100 base rebate on qualifying flow monitors, which watch a home's water use for signs of a leak, and some models can shut the water off automatically. It's a pilot with limited funding, and not every device qualifies in every area, so check with your water agency first.
If your home sits in a mapped flood zone, FEMA's technical bulletin on flood damage-resistant materials (January 2025) is the clearest guide. It rates laminate flooring unacceptable, along with engineered and solid wood. Among vinyl products sold today, only homogeneous sheet or tile glued down with chemical-set adhesives, such as epoxy, makes the acceptable list, and FEMA adds that even that combination qualifies over concrete but not over plywood. A floating vinyl plank doesn't fit that description, so "waterproof" on the box doesn't make it a flood floor.
Concrete slabs: when the water comes from below
Slabs are the norm here. According to NAHB's analysis of Census construction data, 89.9 percent of new single-family homes started in the Pacific states in 2024 were built on concrete slabs, compared with 73 percent nationally, and a garage conversion sits on the garage's slab by definition. Concrete gives off water vapor, which neither floor's waterproof warranty covers, so the slab should be tested before either one goes down.
This is also where the two floors have measurably different limits. Mohawk's current laminate instructions accept a slab up to 80 percent relative humidity measured with in-slab probes (ASTM F2170), or up to 5 pounds of moisture vapor per 1,000 square feet per day by calcium chloride test (ASTM F1869). They also call for a vapor barrier over concrete every time, either 6-mil polyethylene or an underlayment with a moisture barrier built in. Mohawk's SolidTech rigid vinyl accepts a slab under 90 percent, or up to 8 pounds, and its instructions highly recommend the same 6-mil barrier under a floating installation. A slab that tests at 85 percent is too damp for that laminate and within range for that vinyl.
Neither barrier fixes a wet slab. The SolidTech instructions say a vapor barrier shouldn't be used to resolve moisture issues, and Mohawk's laminate instructions require acceptable subfloor moisture to be maintained for the life of the floor. If a slab tests high, the moisture has to be dealt with first, whichever floor you pick. For an ADU or garage conversion where you still want laminate, the choice between click-lock and glue-down laminate on an ADU slab also changes how the floor copes with that moisture.
Coastal humidity, sun and heat
Laminate also responds to moisture in the air. Mohawk's laminate instructions require indoor conditions between 35 and 65 percent relative humidity and 60 to 85°F for the life of the floor. Coastal San Diego air often runs above that range: NOAA's long-term averages for the airport weather station show relative humidity above 65 percent at 4 a.m. in every month of the year, and at 4 p.m. from June through September, with summer mornings averaging about 80 percent.
Air conditioning pulls humidity down indoors; windows left open to the ocean breeze let it in. If your house runs on open windows through the summer, a laminate floor will need a dehumidifier or regular air conditioning to stay inside its range. Vinyl isn't exempt from climate control; the LuxeCraft warranty applies only to dry, climate-controlled indoor installations. But Mohawk's SolidTech instructions set their humidity limit (below 65 percent) only for the 48 hours before, during and after installation, not for the life of the floor.
Vinyl's weak spot is heat and sun. The SolidTech instructions call for keeping rooms between 55 and 85°F after installation and warn that prolonged direct sunlight can discolor the floor, and the LuxeCraft warranty excludes damage from extreme heat or sunlight. RevWood laminate goes the other way here: every RevWood tier carries Mohawk's lifetime fade warranty against sunlight and artificial light. If vinyl is going next to a west-facing slider, plan on shades or blinds, for the floor's sake and the warranty's.
At that same door, laminate's risk is water: wet feet from the pool, rain blowing in and condensation on the door track all land on the first rows of planks. Mohawk's exclusion for moisture that originates outside the room deserves a close read if the floor runs out to a patio. If laminate is still the plan for that room, read up on why laminate swells at coastal sliding doors and how to prevent it first.
Which floor for which room
- Full bathrooms. Waterproof luxury vinyl is the safer pick. A failed supply line at the sink or toilet isn't covered by either floor's warranty, and vinyl planks come through that kind of leak, while laminate planks that soak it up have to be replaced. If you want laminate, choose a top tier and have every edge sealed, at the walls, the tub and the toilet. Mohawk's laminate instructions also rule out any room with a floor drain.
- Powder rooms. Either floor works. The water here is mostly splashes at the sink, which both floors' waterproof warranties cover.
- Kitchens. Both work at the waterproof level, and waterproof laminate in a San Diego kitchen is a realistic choice now. The bigger threat is the dishwasher and the refrigerator's water line, which neither warranty covers, so add leak sensors and keep the perimeter sealed along the cabinets.
- Laundry rooms. Vinyl. Washer leaks are excluded by both warranties, a vinyl plank survives a soaking in one piece, and Mohawk's laminate can't go in a room with a floor drain.
- Entries and rooms that open to a patio or pool. Vinyl copes better with wet shoes and pool traffic; plan window coverings if the glass gets afternoon sun. Laminate needs the threshold sealed carefully.
- Bedrooms, living rooms and hallways. Water rarely decides it here. Choose on look, feel and budget; even a water-resistant laminate is fine where spills are rare and get wiped up quickly.
- Homes with pets. An accident that happens while you're at work can sit for hours, which rules out a 30-minute window. Mohawk's Waterproof and WetProtect laminate warranties cover pet accidents, and its All Pet Gold warranty adds pet stains and scratches on RevWood Select, Plus and Premier as well as on Karastan LuxeCraft vinyl.
- Garage conversions and ADUs on a slab. Test the slab first. If the reading falls between the laminate and vinyl limits above, vinyl is the one that fits.
If laminate is your choice for a kitchen, powder room or entry, stick to waterproof laminate and make the perimeter sealing part of the job.
Beyond water: pets, dents, sun and warranty length
At the top of each range, the other differences are smaller than the water story. Comparing the two lines used as examples above:
| Feature | Karastan LuxeCraft vinyl | Mohawk RevWood Plus or Premier laminate |
|---|---|---|
| Residential warranty | Lifetime | Lifetime |
| Pet stains and scratches | All Pet Gold | All Pet Gold |
| Dents | Dent Proof warranty on most collections | No dent warranty listed |
| Sun and fading | Damage from sunlight excluded | Lifetime fade warranty |
LuxeCraft's Dent Proof warranty covers dents deeper than 2 mm (0.08 inch) from everyday household drops of up to 72 inches. Both floors put a printed design under a protective top layer, so looks and feel depend on the specific product more than the category. Bring samples of each home and compare them in the rooms they're for, because sample boards can look different under your own lighting. When you compare prices, compare like with like: a waterproof laminate against a vinyl with similar warranty coverage, both with installation and perimeter sealing included.
Questions to ask before you buy either one
- What is the wet warranty called, and does it set a time limit for standing water?
- Does it cover pet accidents, and wet or steam mopping?
- Does it cover the subfloor, or only the planks?
- Does full coverage require a sealed perimeter, and is the sealing in the installation quote?
- For laminate: has it passed NALFA's Surface Swell test?
- On concrete: what slab moisture limit does the product allow, and what did the slab test show?
- Are any rooms excluded, such as rooms with a floor drain?
- What indoor humidity and temperature does the floor need, and can your home hold that range year-round?
Other questions about vinyl, laminate and water
Is SPC flooring the same thing as waterproof laminate?
No, although product names sometimes blur the two. SPC is rigid-core vinyl, which ASTM classifies as resilient flooring, and NALFA's definition of laminate excludes products with a resilient top surface. The quickest check is the spec sheet: a fiberboard (HDF) core means laminate, and a vinyl-based core means vinyl. It matters because the core decides whether a plank swells when water gets in.
Can water-damaged laminate be repaired?
Swollen planks don't flatten back out, so the repair is replacement. With a click-together floor, the damaged rows can be taken up and new planks locked in, which goes smoothest with spare planks from the original installation. If water got underneath, the subfloor has to dry before anything goes back down. We handle flooring repairs as well as new installations.
Can I put vinyl in the wet rooms and laminate everywhere else?
Yes, and in many homes that split makes sense. Floating laminate needs transitions at a lot of doorways anyway: Mohawk's instructions require a T-molding in doorways narrower than 32 inches or wherever the plank direction changes, so a switch to vinyl at a bathroom or laundry door can fall where a transition would sit regardless. Choose the two colors together, in the same light, so the change at the doorway looks planned.
Pricing vinyl and laminate for your wet rooms
The answer often isn't one floor everywhere. It's vinyl where leaks, standing water or a damp slab are likely, and laminate, in the right tier and sealed at the edges, where water is occasional and gets wiped up fast. When you request a free estimate, we'll measure the rooms, talk through where water comes from in each one, and price vinyl and laminate options for each room with installation included, so you can compare them on paper before you decide.
