Preparing a steel in block wall for plasterboarding over

[crispy_wafer]

I have this steel above a window, what should I do to prepare for plasterboard, plasterboard will be dot/dabbed on this wall.  Should I set timbers into the web and screw cement board flush to the block?

 

[Conor]

Our guys just used a single board to span our steel heads entirely. Nothing done apart from some wool insulation.

[Iceverge]

Airtight paint. I love to see it!!

 

Use something capable of taking a screw. Our builder just put in plaster board and it struggles with curtain rails. 

[Super_Paulie]

I filled in with slim PIR, then hammered in timber wedges just proud along the length. Then filled in-between with thicker PIR, foamed and screwed the board on. Insulated board underneath attached with Sika EBT. Seems to work!

Edited October 12, 2024 by Super_Paulie

[nod]

Don’t forget to drop a baton in the face to take a curtain rail 

[crispy_wafer]

1 hour ago, Iceverge said:

Airtight paint. I love to see it!!

 

Use something capable of taking a screw. Our builder just put in plaster board and it struggles with curtain rails. 

Haha, you want to see the mess I’ve made with the parge coat.

 

[crispy_wafer]

Done!

 

Cut out some of the PIR and Knocked in timbers, and tekscrewed though the steel.  Some more of mine and missus rough arse parge on show too! 

 

[Super_Paulie]

Wont the screws be a cold bridge though, if they are through the beam?

Miniscule in the scheme of things I'd have thought, but I kept away from going through the beam just incase. I didn't have access to the outside face as it had already been bricked in order to insulate from that side.

[crispy_wafer]

Possibly, The steel is on the warm side of the cavity insulation and if the screws are an issue then I think the steel flanges top and bottom are probably more of an issue...  I think I can live with it.