 

 The oven at the end of its second winter without a weather canopy.
The oven at the end of its second winter without a weather canopy. 
 The owners had underestimated the destructive power of the freeze-thaw cycle.
The owners had underestimated the destructive power of the freeze-thaw cycle. 
 Besides superficial damage to the outside, the inner surfaces of the refractory brick vault had spalled.
Besides superficial damage to the outside, the inner surfaces of the refractory brick vault had spalled. 
 The oven would probably not resist another winter unprotected.
The oven would probably not resist another winter unprotected.
