Why Hotels Use Key Cards Instead of Metal Keys
Metal keys cost hotels more every time one goes missing. See why key cards win on security, branding, cost control, and everyday guest convenience.
Key Card Basics
What Are Hotel Key Cards Made Of?
Guests rarely think twice about the card in their wallet, but hotel key cards are built from a surprisingly small set of base materials — and the choice between them affects everything from print quality to how the card holds up in a beach-town gift shop's worth of humidity.
Three materials cover the overwhelming majority of key cards in circulation today: PVC plastic, wood, and specialty coated paper. A fourth, degradable PVC, has become common enough to count as its own category. Here's how each one is actually constructed.
PVC key cards — the industry standard
PVC remains the default material for hotel key cards because it's stable, prints cleanly, and costs the least to produce at volume. A standard card isn't one solid slab of plastic — it's a laminated sandwich, typically three layers pressed together under heat.
The face and back layers are usually a light-blocking PVC sheet, chosen so printed graphics and colors don't show through from one side to the other. The middle layer carries whatever makes the card functional: a magnetic stripe, or an RFID inlay — the small chip-and-antenna assembly that gives the card its proximity read. Some properties add a thin transparent overlay film, roughly 0.04–0.08 mm, laminated over the printed face to protect the artwork from scuffing; when that's added, the inner layer is thinned slightly so the finished card still comes out at the standard thickness.
Wood key cards
Wood cards follow a similar layered logic — face, core, back — but wood can't go through PVC's high-heat, high-pressure lamination process without warping. Instead, the layers are bonded with adhesive, which is why wood cards feel and flex slightly differently than plastic ones.
Bamboo, maple, walnut, and cherry are the species you'll see most often, each with its own grain and tone, which is part of the appeal for boutique and eco-positioned properties. The trade-off: wood is not waterproof. Extended exposure to moisture or high humidity can cause the card to warp or shrink, so wood stock needs drier handling and storage than plastic. See wooden card options for species and finish choices.
Paper key cards
Paper key cards use two layers of coated paper stock for the face and back, with an RFID inlay bonded between them using adhesive rather than heat — the same lamination approach as wood, for the same reason. What's often marketed as waterproof paper (wood-free) card stock is built this way: a coated paper base engineered to resist moisture far better than uncoated paper would, without relying on a tree-based wood veneer. Available thickness varies with the weight of paper stock used, giving properties some flexibility in how the finished card feels. Explore paper card specifications for the available weights and finishes.
Degradable PVC
Degradable PVC is built and laminated the same way as standard PVC — same layers, same heat-press process, same compatibility with any lock that reads a standard card. The difference is in the plastic formulation itself, which includes additives designed to help the material break down faster once it reaches a landfill, compared to conventional PVC. For properties that want plastic's durability without fully committing to wood or paper, it's a middle path worth knowing about. See degradable PVC for the technical detail.
Comparing the four materials
| Material | Lamination method | Water resistance | Best fit |
|---|---|---|---|
| Standard PVC | Heat and pressure | Excellent | Any property prioritizing cost and durability |
| Degradable PVC | Heat and pressure | Excellent | Properties wanting PVC's durability with a lighter footprint |
| Wood | Adhesive bonding | Poor — avoid prolonged moisture | Boutique and eco-branded properties |
| Waterproof paper (wood-free) | Adhesive bonding | Good, coated-stock dependent | Eco-focused properties wanting a lighter card |
What actually determines a card's final thickness
- The gauge of the face and back sheets or paper stock
- Whether the middle layer holds a magnetic stripe, an RFID inlay, or both
- Whether an overlay film has been added over the printed face
- The species and cut of wood, for wood card stock specifically
Key takeaways
- PVC, wood, paper, and degradable PVC cover nearly all hotel key cards in circulation
- PVC and degradable PVC use heat lamination; wood and paper use adhesive bonding instead
- Wood cards look and feel premium but need drier storage and handling than plastic
- Waterproof paper stock trades some water resistance for a lighter environmental footprint
- Any of the four materials can carry either an RFID inlay or a magnetic stripe
Frequently asked questions
Is one material more durable than the others?
Standard and degradable PVC hold up best under repeated handling and moisture exposure. Wood and paper stock are sturdy under normal use but shouldn't be treated as waterproof — keep them away from pool decks and prolonged humidity.
Can wood and paper cards use RFID chips?
Yes. The inlay sits in the middle layer exactly as it would in a PVC card; only the lamination method and outer material differ.
Will an eco-material card work with our existing door locks?
In almost every case, yes. Locks read the chip or stripe inside the card, not the material around it, so switching from PVC to wood, paper, or degradable PVC typically requires no lock hardware changes at all.
How do I decide which material fits our brand?
Cost-sensitive, high-volume properties usually default to standard PVC. Boutique and eco-positioned properties often lean toward wood or waterproof paper for the tactile brand statement, while degradable PVC suits properties wanting a lower-impact option without changing how the card looks or feels.
Want to feel the difference between PVC, wood, paper, and degradable PVC yourself? Request free samples from Cardotel before you commit to a material.
