Wall with rounded part - formwork plywood or planks?

[BORNER]

We are going to cast an 80 cm high wall that has a rounded section in the middle. The wall should be 15 cm thick. But is it easiest to make the casting mold using formplywood or with planks to achieve the rounded part?

 

[slacker]

We are going to cast an 80 cm high wall that has a rounded part in the middle. The wall will be 15 cm thick. But is it easiest to make the mold in plywood or with planks for the rounded part?

[image]

I recall that someone on the forum used masonite to build a similar form. What is flexible apart from Masonite is groove-cut and thus bendable MDF.



He who seeks shall find;

https://www.byggahus.se/forum/threads/gjutform-med-radie.186238/

Note that I have never done anything like this myself...

 

[BORNER]

I recall someone on the forum used masonite to build a similar mold.
Apart from Masonite, what's available that is flexible is grooved and thus flexible MDF.

[image]

He who seeks shall find;

[link]

Note that I have never done anything like this myself...

Thanks, @slacker! I missed that one! It should turn out very round and nice if you also reinforce it with several layers of masonite as suggested in the thread.