Huntonit on a broken roof in a bathroom of about 4m2

[tyomka]

Hello,
We are considering replacing the ceiling in our bathroom which is about 4m2.
We are thinking of using Huntonit which is suitable for bathrooms. What I'm wondering is how to deal with the joint where the ceiling breaks.
It's not possible to click the panels together at that point. Do you use some kind of trim or what is commonly done?

Also, another consideration. Which format would be best, 300x1200 or 600x1200? Since the bathroom is not very big, it seems like 300x1200 might suit best (see also sketch).

Grateful for your tips and advice!

 

[sturnus]

In eg Byggmax https://www.byggmax.se/sockel-12x43-vit-p08612044
For me 30x120

 

[tyomka]

Thank you! Yes, that could be an option.
Maybe it can be split down to 5-7mm to get it as thin as possible.

 

[sturnus]

Jag minns inte, men jag tror de har tunnare på Karl Hedin.