Tile backing board

[Ubi]

Hi all,

Can anyone help with question. I am laying some new insulation and electric UFH and need to minimise the floor build up. So far I am laying a layer of DPM, 50mm PIR cut to fit and then was planning on placing a 6 mm cement backed tile back board the UFH mat and then tile on that. I am trying to figure out if there is anyway to securely fix insulated cement lined tile back board (ProWarm) to PIR insulation? I don't want to lay a level of self leveling screed on the PIRas it'll need be roughly 12mm to avoid cracking and this will affect the overall head height. I'm concerned that the 6mm back board won't be held in place well enough of I just lay them down. Can I use an adhesive to glue them to the PIR? Any suggestions would be great.

 

[JohnD]

No, but, OOI, do you know the cost of running electric UFH?

From what I can see, most of the people who install it use it for one winter, then, after seeing the bill, turn it off and never use it again.

My apologies if you are very rich and not concerned.

 

[Ubi]

Hey,

Not rich and I am concerned hence why I'm trying to increase the level of insulation and mitigate any cold bridging. The whole building complex is electric only and it currently with no access to gas plus it already has electric UFH which we are replacing. In doing this we are adding additional insulation below the tiles on the slab because currently, non exists. This will reduce it head height and means we need to cut the for and step up into the flat I am trying to balance will the out.

 

[JohnD]

The whole building complex is electric only and it currently with no access to gas

Sorry to hear that.

What is under this floor?

How old is the building?

 

[Ubi]

Car park. It's an old converted retail space and it's not been converted well. It's 20 + and wouldn't pass building regs now. So much exposed steel that cold bridges to the outside. Nightmare to keep warm.