How should this gap be filled?

[AmKal]

Hi, the builder has suggested filling gaps in the corner (where the steel and wall meet) with rockwool and then boarding up with plasterboard. 

 

Will this be okay, or should some sort of foam be used or even it should all be bricked up first and then plastered?

[AmKal]

Just now, AmKal said:

Hi, the builder has suggested filling gaps in the corner (where the steel and wall meet) with rockwool and then boarding up with plasterboard. 

 

Will this be okay, or should some sort of foam be used or even it should all be bricked up first and then plastered?

 

[Conor]

First priority is making sure you're compliant with the 30min fire resistance regs... Painting the steels with intumescent paint or fully boarding with pink board - so all surfaces of the steel are covered. Your builder's suggestion doesn't achieve this.

 

 

There a quite a few things in your various pics that just don't look "right". Get your SE and architect out for a look over and word with the builder. They'll probably charge you a couple hundred quid each, but will be be worth it 

Edited February 12, 2023 by Conor

[markc]

As above and wool or foam are good for gap filling. Boarding over is easier than intumescent paint … unless you are making the steels a feature of course.

[AmKal]

1 hour ago, markc said:

As above and wool or foam are good for gap filling. Boarding over is easier than intumescent paint … unless you are making the steels a feature of course.

Hi, the plan is for fire resistant boards thankfully!  The plan is for rockwool of somekind to be stuffed in to gaps... I feel it'll be a cold bridge though as the elements are pretty much on the other side.

 

I've had so many issues with the build and just want it done.