Screed & wet UFH issues.

[Sean Kelly]

Many thanks Alan and lads, all I can do is report this discussion back to my Doctor. Shame we can't X-ray the floor!!

I would also like to know the outcome of this issue. So will request that she keeps me in the loop.

Cheers
Sean

 

[Chalker]

You can, well sort of.
I have a FLIR camera for my phone. Very handy to trace pipework in floors.

 

[Sean Kelly]

You can, well sort of.
I have a FLIR camera for my phone. Very handy to trace pipework in floors.

View attachment 95421

Wow !!
I just Googled that. Looks pretty smart.

 

[Ajax123]

Irrespective of the screed, the pipework needs controlling. Having no mixing set/manifold, will destroy anything that's laid on it.

Missed that....you're completely correct. Running an underfloor heating sysem too hot is also a health risk. It has been linked in some studies to thrombosis. Maximum surface temperature should be 27C with an anticipated surfacd temperature around 22 to 23C. This would require a flow temperature of around 40 to 45 in sand cement. Radiators tend to run at 60+. Running radiator temperature flows will yeild a temperature closer to 45 to 50C in sand cement. This can be dealt with in small areas using a Return temperature limit valve but these are not suitable for anything over about 15m2

 

[John Benton]

The top of the screed does looks very sandy, no way should you be able leave finger marks when scraping the surface. I wouldn't really be happy putting any type of floor covering over that screed combined with the heating system.

I'm also intrigued to know, when he called for an appointment, did you tell him there were no free times until 2 weeks on Thursday, and he would have to ring first thing in the morning?