Joining/finishing corners between fermcaell and plasterboard

[andyscotland]

Hey, I am getting towards finishing (in one room at least 🤣).

 

I have fermcaell on two external walls (part of a fire resistant buildup) and plasterboard on two internal walls and the ceiling.

 

I'm planning to skim the plasterboard.

 

Wondering what's the best way to fill & join the joints between the fermcaell and the PB.

 

Should I use fermcaell joint filler and paper tape?

 

Or normal joint filler (Easifill/Knauf/etc) and paper tape?

 

Or...?

 

I understand the fermcaell Fine Surface Treatment is very thin - if I use tape on the joints will it be able to cover/hide it? Or would I be better off skimming the fermcaell as well to get a neat finish?

 

Questions questions! 🤣

 

Thanks!

[nod]

Tape all of it with fibre tape 

Paper tends to lift with plaster finish 

Use gypsum NOIt filler tgen joint cement Easifil is no good for taping 

[andyscotland]

Thanks @nod - and then Fine Surface Treatment over the filler & boards on the fermcaell sides? Will that hide the tape ok?