On 17/05/2019 15:19, Darren Chapman wrote:

Got a couple of pics now of the issue:

https://tinyurl.com/wallinplace

Thats the front, where it's ok.

https://tinyurl.com/missingwall

shows the bit that's missing annoyingly :-/

It looks as if you have a outgoing roof apex to the right so that wall
might have to reach some distance with possibly not much load support
beneath.

Perhaps a firewall can be made of plasterboard?

https://www.british-gypsum.com/white...tions/firewall


--
Adrian C