A Keller has two qualities the rest of the home lacks: it is out of sight, and it is often cooler and more humid. Both shape what belongs there. Out of sight means it suits things used a few times a year. Cooler and damper means moisture-sensitive items need protection.
Decide what the Keller is for
Reserve the basement for clearly defined categories rather than letting it become general overflow. Common, sensible uses include:
- Seasonal equipment — winter sports gear, garden tools, summer fans.
- Bicycles and their accessories.
- Bulk household supplies and preserved food in suitable conditions.
- Archived paperwork and keepsakes in sealed, raised containers.
Protect against moisture first
Before storing anything, address damp. Basements are prone to higher humidity, and condensation can damage cardboard, textiles, and paper. The German Environment Agency provides public guidance on indoor humidity and preventing mould, which applies directly to basement rooms.
- Keep boxes off the floor on shelving or pallets so air can circulate underneath.
- Prefer sealed plastic bins to cardboard for anything that must stay dry.
- Leave a gap between stored goods and exterior walls.
- Air the compartment as conditions allow, following general ventilation guidance.
Shelving and a labelling map
Open shelving along the walls turns a deep room into reachable layers. Assign each shelf a category and write a short index — even a sheet by the door listing what sits where — so the contents stay findable months later. The table is a workable default.
| Level | Store | Reason |
|---|---|---|
| Top shelves | Light, rarely used items | Out of the way, no lifting hazard |
| Middle shelves | Seasonal, moderate-weight goods | Easiest to reach and rotate |
| Lower shelves | Heavy sealed bins | Stable, kept off the floor |
Safety note
Keep walkways clear and do not block the route to building services such as meters or shut-off valves. Shared basements in apartment blocks often have house rules (Hausordnung) on what may be stored.
Review once a year
Because the Keller is out of sight, it needs a deliberate annual review or it silently fills. Pick a fixed date, open every box, and apply the same frequency test used elsewhere in the home: if a year passed without needing it, decide consciously whether it stays.