C/U rear entry into Cavity wall.

[rugbyspark1]

Hi Folks, These new C/U's dont seem to have thought this out too well. Old cables in cavity wall in to C/U. Need to make fireproof. Whats your best bet ?.

 

[SparkyChick]

Intumescent expanding foam I would suggest. I wouldn't go made with it, maybe gradually layer it into the hole like icing a cake.

 

[Pete999]

Hi Folks, These new C/U's dont seem to have thought this out too well. Old cables in cavity wall in to C/U. Need to make fireproof. Whats your best bet ?.

Fire rated linings for sealing cable entries to metal consumer units - Envirograf - https://envirograf.com/product/fire-rated-linings-for-sealing-cable-entries-to-metal-consumer-units/

 

[rolyberkin]

That is the most expensive metal box I have ever seen!

If you feel the need then use one of the following.

Intumescent Sheet Material - https://www.firesealsdirect.co.uk/intumescent-sheet-material.html?gclid=CjwKCAiA15vTBRAHEiwA7Snfc0peJM_yBN8eIs2OBUyIiWCP1hWiTp1uJPtnCbwUcOtDT9Uq-aKN0BoCtDgQAvD_BwE

 

[rolyberkin]

The above is available in 2mm thick which may be better, speak to their sales office.

 

[davesparks]

Put a bit of plasterboard on the wall to cover the hole

 

[Jamie']

CP 617 - Firestop putties - Hilti United Kingdom - https://www.hilti.co.uk/firestop-and-fire-protection-systems/firestop-putties/r4673