How to preheat a baking stone: first use and warm-up

Why cold-start matters: shock is a rate problem

Thermal shock is a rate problem, not a temperature problem. A stone that rises with the oven never experiences a steep gradient across its body. A cold stone placed into an already-hot oven takes the entire temperature differential at once — and that is what cracks stone. Starting cold costs nothing and prevents the most common failure in the field.

The first heat

On the first heat only, hold the oven at approximately 200–250°F for the first 30 minutes before continuing up to full operating temperature. This drives off any moisture the stone picked up in shipping or storage and gives it extra margin on its first cycle.

The same applies later: if a stone has been removed and stored unused for an extended period, treat its next warm-up as a first heat.

Every warm-up after that

Allow 30 to 45 minutes for the stone to reach full operating temperature before loading food. The oven thermometer reads the air, not the stone — the air gets there first, the stone follows.

Cooling down

Let the stone cool gradually inside the oven. Do not remove it hot, and do not cool it with forced air, cold surfaces, or liquid. Most operators simply leave the stone in the oven permanently — which is also the recommended practice, and means the cold-start rule takes care of itself.

This procedure is what the guarantee stands on

These steps are not fine print — they are the operating practice that prevents a stone from ever cracking in the first place, printed in full with every kit:

Last updated July 23, 2026