New Solid Floor + UFH

[Nail_it]

Hi guys,

I have read many threads regarding the make-up and installation of a concrete floor. All seem to vary some what, due to installers preference.
So using that information as guidance I have had the make-up for my floor, only to change it again, then again and again and again....

Finally, I now think that I have the design suitable for my installation but would like for you guys to just sick your nose over it, thanks.

New extension, 2.7m x 5.2m open plan kitchen diner (meeting up to original timber joist and floor).
I have placed the insulation above my slab as insulation manufacturers specify that this will be more suitable short term heating cycles.

75mm sand/cement screed + UFH (wet)

? separation polysheet

100mm Xtratherm XT/UF insulation +
25mm Xtratherm insulation around perimeter

1200g radon dpm

25mm sand blinding

100mm GEN 1 concrete

150mm hardcore

What are your thoughts guys ?

 

[Paul348]

That is how i did mine, see photos

75mm sand/cement screed + UFH (wet)

as you can see by the photos i went for a liquid screed as i believe it offers the best thermal transfer due to 100% coverage of the pipes. It was all poured in around 15 minutes, it took them longer to clean out the pump ! The only thing with going with a liquid screed is you need to make the floor like a tank so lots of duct tape from around the edges.

? separation polysheet

yes you do need this to stop the screed attacking the foil on the insulation if you do get a leak.

Untitled

• Paul348
• 10 Mar 2011
• 1

Untitled

• Paul348
• 10 Mar 2011
• 1

Untitled

• Paul348
• 10 Mar 2011
• 1

 

[Nail_it]

Paul348, looks good.

What was your floor area ? and roughly what was the cost to have it liquid-screeded ?

Oh, one more thing please, how effective is the UFH...

does it nicely warm the room?
or,
does it just take the chill off ?

Thanks.