I removed (very carefully) my form a few hrs after laying the shell (no chimney or back) It was on 3/16 shims and when removed the form dropped down and it slid out fine. I could then very easily remove any uncured mortar that made its way between the bricks and form. The structure was/is rock solid, I then built the back wall and chimney the next day. It was much easier to clean the mortar from the back wall bricks with the foam removed.
Hello Matthew, and welcome to the BrickWood forum.
You win first place in our ongoing discussion about how to set up the foam mold for easy removal! That’s the way a bricklaying rockstar would approach this problem, and this method is no muss, no fuss.
It’s also clear that you considered how much height could be added to the mold before it affected the arch structure. So:
Thank you for sharing your method with us, and I hope you’ll post here often. It’s really great to have another Matt here.
That hearth frame is gorgeous! Your elevating idea really paid off. Can’t wait to see the final results.