DPC / Insulating

[Ryan Bazeley]

Hi,

 

I have a steel opening (pictures below). Originally it was to be fixed at DPC level but has been changed to be 250mm below DPC so am able to finish the cladding correctly due to the size of the concrete plinth. I am cladding with render board.

 

I will be covering the bottom of the steel with concrete up to DPC level, is there anything I should cover it in before pouring, wrap it in DPC?

 

What is the best way to insulate the beams, celotex?

 

thanks

 

 

[PeterW]

Paint with bitumen paint, build a cardboard “dam” about 2” around the steel and then fill with expanding foam then concrete it in. 

[Dudda]

You'll have to get more support under that steel first before you do anything. That steel is about an inch above the concrete and will have to be filled with structural concrete or grout. It's only resting on a few shims. If you can fit some structural insulation between the steel and concrete (compacfoam or similar) that would be good but really the structural insulation should have being fitted first, not trying to squeeze it in now.

 

Once that issue is resolved you can then do as PeterW suggested above by coating the steel in foam and then concrete.

 

 

EDIT:

sample image from Google to prevent cold bridge:

 

Edited June 23, 2021 by Dudda