Is 5cm cement render too thick and heavy?

[gooseodyssey]

I have a very wonky wall! Internal bedroom, wonky old Victorian bricks, 1st floor. I've done 3 scratch coats, about 2.5cm in some places, and the low areas look like they'll need about 3cm more depth to become level, so a total of at least 5cm of render in some areas. Is that too thick, too much weight on the wall? Do I need to look at battening out the wall instead? Cheers

 

[S a plastering]

Yes

 

[Smudger1]

Yes

 

[bobski]

Victorian.......

Cement......


Then...... yes

 

[Cockney]

Crikey.

 

[Stewie03]

Get some battens and some packers

 

[themucky1]

it’s a yes from me!

 

[Monkey Boy]

yes

 

[CeeVee]

Yes.
Forget that now and go over it in hardwall or something