[Versachi]

I did my 42 without a form and I was able to do about a course each evening I worked on the oven. The more care you take in laying each brick the longer it will take. By having the bricks cut already you will be able to go faster. Depending on how fast your mortar sets you may not want to do more than a course each day. If the prior course doesn't set you run the risk of shifting it while laying the next course. Also cleaning the mortar from the inside takes some time. I found that I was able to lay a course and sometimes a little less before I would lose patience and try to make bricks fit when they wouldn't. My advice would be to stop for a break (may be an hour or a day) when you have layed a brick that you think you may regret the next day. It may not be completed as fast as you would like but you will be much happier with a dome that has a tight look to it.


Cheers, Versachi