Cold bridge to RHS lintel with bottom plate

[philnic]

I have the below detail for the 6m wide lintel above some new bifolds in my extension.  The RHS goal post sits in line with the internal blockwork and has a continuous 6mm plate welded to the bottom to support the outer brickwork skin above the doors.  I'm worried that this plate will permit cold bridging.  I intend to dot and dab plasterboard down the wall and return in to the door head, but is this enough to prevent cold bridging through the plate?  

 

Do you have any suggestions or products to help avoid this, or am i worrying about nothing?

 

       

 

Edited July 18, 2022 by philnic

[Dan F]

Not sure how/where it would apply here, but we solved our steel thermal bridging issues with https://www.armatherm.co.uk/

[PeterW]

37 minutes ago, philnic said:

I have the below detail for the 6m wide lintel above some new bifolds in my extension.  The RHS goal post sits in line with the internal blockwork and has a continuous 6mm plate welded to the bottom to support the outer brickwork skin above the doors.  I'm worried that this plate will permit cold bridging.  I intend to dot and dab plasterboard down the wall and return in to the door head, but is this enough to prevent cold bridging through the plate?  

 

Do you have any suggestions or products to help avoid this, or am i worrying about nothing?

 

       

 

Why can’t people make things simple ..? Looks like your architect wants about 100mm of blockwork on top of the steel which will be a proper b***h for the brickies. Get them to amend the drawing to put a  wall plate on top of the steel with welded restraint tabs on the steel and then put ceiling joists straight on top. Also - what’s with the roof build up as you appear to have multiple joist layers ..??

[philnic]

48 minutes ago, PeterW said:

Why can’t people make things simple ..? Looks like your architect wants about 100mm of blockwork on top of the steel which will be a proper b***h for the brickies. Get them to amend the drawing to put a  wall plate on top of the steel with welded restraint tabs on the steel and then put ceiling joists straight on top. Also - what’s with the roof build up as you appear to have multiple joist layers ..??

 

The detail is now slightly different as i'm hanging the joist with hangers rather than sitting on a wall plate.  The bottom joist is a 47 x 200 joist, with furring's, then 150mm insulation, not another joist.  Any suggestions on the cold bridge, if there is one??

[Canski]

https://downloads.halfen.com/catalogues/de/media/catalogues/brickworksupportsystems/FM_HALFEN_20-1_E.pdf
 

I’ve not used these before but have used other Halfen products. They were pretty good. Not sure what the payback time over your design would be and I’m not qualified to comment on that. Just an idea.