Casting soles for a support wall, when is it safe to remove the form?

[cederbusch]

Gonna cast foundations that the retaining wall on the chimney will stand on and have built forms. It might be unnecessary, but to avoid the risk of the concrete shrinking a bit and leaving a gap between the foundation and the brick, I thought of casting a little up onto the brick and then trimming the excess away.

Overkill? And when can I remove the form to get access to cut?

 

[BSOD]

If you remove the mold about 18-24 hours after casting, the concrete is fairly easy to shape. For example, you can scrape a bit with a morakniv. Or easily with an angle grinder with diamond blade.

I don't know if I'm misunderstanding your mold, but it doesn't seem to be much support?

 

[cederbusch]

If you remove the mold about 18-24 hours after casting, the concrete is fairly easy to shape. For example, you can scrape a little with a Morakniv. Or simply use an angle grinder with a diamond blade.

I don't know if I'm misunderstanding your mold, but it doesn't seem to be much of a support?

I have changed it since that picture, because I also thought it wasn't much of a support 😁