Store clay in a sealed bag, in a space that stays above freezing and maintains a reasonably stable temperature. Unheated studios, garages and outbuildings need particular attention during cold weather.
Clay contains water, so freezing can affect its texture, consistency and workability. Preparing your storage area before temperatures drop can help keep your clay ready for use throughout winter.
Keep Your Clay Above Freezing
If you store clay in an unheated space, monitor the temperature, particularly overnight. A garage or studio that feels suitable during the day may become much colder after dark.
Where possible, move your clay to a storage area that remains above freezing. A thermometer that records minimum temperatures can help you check how cold the space gets when you are not there.
Keep Clay Off Cold Floors and Away From Draughts
Avoid storing bags of clay directly on a cold concrete floor. Use suitable shelving or a pallet, and keep clay away from external walls, doors and draughts.
Insulation can help slow temperature changes, but it is not a substitute for storage that stays above freezing during prolonged cold weather.
Keep Clay Bags Sealed
Keep unopened clay in its original packaging until you are ready to use it. Reseal opened bags tightly to limit moisture loss.
If the packaging is damaged, place the clay inside another sealed plastic bag or an airtight container. Check seals regularly, particularly in heated studios where clay can dry out.
Avoid Direct Heat and Large Temperature Changes
Aim for a reasonably stable storage temperature. Keep clay away from radiators, fan heaters and other direct heat sources, which can encourage moisture loss.
If you bring clay into the studio from a cold storage area, allow it to reach a suitable working temperature before use. Do not use direct heat to warm it quickly.
Bring Clay Deliveries Indoors Promptly
During cold weather, bring clay deliveries into a suitable storage area as soon as possible. Avoid leaving bags outside for extended periods, particularly when temperatures are close to or below freezing.
If you collect clay yourself, unload it promptly rather than leaving it in a cold vehicle overnight.
Check Your Clay Regularly
Check stored clay during prolonged cold spells and after especially cold nights. Inspect the bags for damaged packaging and make sure they remain properly sealed.
If you keep a larger stock, check the storage conditions regularly rather than waiting until you need the clay.
What If My Clay Has Already Frozen?
Frozen clay can often be recovered, although it may need further preparation before use. Allow it to thaw slowly and completely, without applying direct heat.
For step-by-step advice, read My Clay Has Frozen – What Can I Do?
Winter Clay Storage: Key Points
Keep clay sealed, store it above freezing and avoid direct heat. Monitor unheated storage areas and bring deliveries indoors promptly.
For advice throughout the year, read our guide to storing clay effectively.