Card storage
Deck boxes, storage boxes and organisers — the difference between keeping cards and keeping them mint.
Storage is mostly an environment problem, not a product problem. Aim for the coolest, driest part of your home that stays that way year-round — institutions use roughly 65–70 °F and 35–50% relative humidity — and keep cards out of damp basements, hot attics and direct light.
The environment does most of the work
Preservation institutions hold collections at constant moderate or cool temperatures of about 65–70 °F with relative humidity around 35–50%. The National Archives acknowledges that homes rarely manage this and gives a practical substitute: the coolest and driest spot in the house that stays that way all year.
In most homes that means an above-ground interior closet, because interior rooms hold a steadier temperature across the seasons. Avoiding swings matters more than hitting an exact figure.
Damp basements are specifically discouraged — dampness makes items stick together and promotes mould. Attics and garages fail the same test from the opposite direction.
Boxes and capacity
Storage boxes are sold by card count — 400, 800, 3200 and similar — and those figures assume unsleeved cards. Sleeving reduces capacity substantially, and double-sleeving reduces it again.
A box that is only part full is worse than a full one, because cards slide and lean. Dividers or filler keep everything upright and stop the edge wear that comes from movement.
Deck boxes are sized by sleeved count
A deck box rated for 100 cards means 100 sleeved cards, not 100 bare ones. Double-sleeving a deck can push it past the box it previously fitted, which is the most common reason a deck suddenly will not close.
Forcing a lid shut on an over-full box presses on the card edges — exactly the pressure the box exists to prevent.
Sorting is protection
This sounds like organisation rather than preservation, but a collection you can search without handling every card is a collection that suffers less wear. Every search through an unsorted box is another round of contact.
Common questions
- Where should I store trading cards in my house?
- The coolest, driest place that stays that way year-round — usually an above-ground interior closet, since interior rooms hold a steadier temperature. Avoid damp basements, and avoid attics and garages that swing with the seasons.
- What temperature and humidity are best for storing cards?
- Institutions maintain roughly 65–70 °F and 35–50% relative humidity. At home the realistic goal is stability rather than a precise figure — avoiding large swings matters more than the exact number.
- Can I store cards in the basement?
- It is discouraged. Basements are usually too damp unless dehumidified, and dampness causes items to stick together and promotes mould growth.
- Does a 100-card deck box hold 100 sleeved cards?
- Yes — deck box capacities are quoted for sleeved cards. Double-sleeving adds enough bulk that a deck may no longer fit a box it previously did.