Baking Stone Pre-heat lag time
My wife bought me an infrared remote thermometer for Christmas, and I've been using it much more than I expected. One thing I've noted: my baking stone, a Fibrament, lags behind my oven announcing it has reached temperature. At 500°F it lags by 25 minutes. Other make stones' lagtime will vary, but I suggest 30 min. from the time the oven air temperature has reached the set temperature is a reasonable rule of thumb. The guidance, "about 1 hour before loading preheat your oven and baking stone..." may or may not be quite enough. My oven, with the stone in, takes 40 mins. to reach 500°F.