I just realized that my mason, who supposedly has 18 years of experience, laid all the bricks for the first 4 courses of my oven DRY. From what I read, this was a critical error and the mortar may have dried instead of cured. Doesn't help too that it was over 80 degrees yesterday. And this was after he made a point of saying how the plans said the bricks needed to be soaked. I feel this is a critical error, and he should knock down the first courses and start over, but even if that is on his nickel, this has a to me in time and schedule conflicts. So here is my question community: has the integrity of my dome been compromised and should I insist that he start over?