We have recently had a lot of rain. It has taken a long time to heat up the oven. The floor of the oven had difficulty getting up to 550 degrees & holding it. Finally. I hooked up a battery operator blower to increase the temperature dramatically, kind of like a bellows. It worked fine & I noticed a LOT of water coming out from the bottom of the oven which is on an elevated slab of concrete. After that, the floor got up to 750 & maintained its heat like normal. The exterior of the oven is a ceramic blanket over the firebrick, covered in lath & 2 coats of exterior stucco. After rain storms, I notice the oven is dry inside ( maybe a little condensation.)I was thinking of keeping a tarp over the oven until I use it but will it actually trap moisture? Thoughts anyone?? Any suggestions with this.